# Patent

## Title
Bisphenol ether derivatives and methods for using the same

## Abstract

Compounds having a structure of Formula I:




or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein R1, R2, L1, L2, L3, X, a, b, c, n, and m are as defined herein, are provided. Uses of such compounds for modulating androgen receptor activity and uses as therapeutics as well as methods for treatment of subjects in need thereof, including prostate cancer are also provided.

## Background
CROSS-REFERENCE TO RELATED APPLICATION
This application is a divisional application of U.S. application Ser. No. 16/589,853, filed Oct. 1, 2019, which is a continuation application of U.S. application Ser. No. 15/557,726, filed Sep. 12, 2017, which is a U.S. National Stage Application under 35 U.S.C. § 371 of International Patent Application No. PCT/CA2016/000070, filed Mar. 11, 2016, which claims priority to U.S. Provisional Application No. 62/131,969 filed Mar. 12, 2015, the disclosures of each of which is herein incorporated by reference in its entirety for all purposes.


STATEMENT OF GOVERNMENT INTEREST
This invention was made with government support under R01 CA105304 awarded by the National Institutes of Health. The government has certain rights in the invention.


BACKGROUND
Technical Field
This invention generally relates to bisphenol-related compounds and their use for treatment of various indications. In particular the invention relates to bisphenol ether compounds having a chlorohydrin or a protected chlorohydrin moiety and their use for treatment of various cancers, for example all stages of prostate cancer, including androgen dependent, androgen sensitive and castration-resistant prostate cancers. This invention also relates to bisphenol-related compounds and their use for modulating androgen receptor (AR) activity.
Description of the Related Art
Androgens mediate their effects through the androgen receptor (AR). Androgens play a role in a wide range of developmental and physiological responses and are involved in male sexual differentiation, maintenance of spermatogenesis, and male gonadotropin regulation (R. K. Ross, G. A. Coetzee, C. L. Pearce, J. K. Reichardt, P. Bretsky, L. N. Kolonel, B. E. Henderson, E. Lander, D. Altshuler & G. Daley, Eur Urol 35, 355-361 (1999); A. A. Thomson, Reproduction 121, 187-195 (2001); N. Tanji, K. Aoki & M. Yokoyama, Arch Androl 47, 1-7 (2001)). Several lines of evidence show that androgens are associated with the development of prostate carcinogenesis. Firstly, androgens induce prostatic carcinogenesis in rodent models (R. L. Noble, Cancer Res 37, 1929-1933 (1977); R. L. Noble, Oncology 34, 138-141 (1977)) and men receiving androgens in the form of anabolic steroids have a higher incidence of prostate cancer (J. T. Roberts & D. M. Essenhigh, Lancet 2, 742 (1986); J. A. Jackson, J. Waxman & A. M. Spiekerman, Arch Intern Med 149, 2365-2366 (1989); P. D. Guinan, W. Sadoughi, H. Alsheik, R. J. Ablin, D. Alrenga & I. M. Bush, Am J Surg 131, 599-600 (1976)). Secondly, prostate cancer does not develop if humans or dogs are castrated before puberty (J. D. Wilson & C. Roehrborn, J Clin Endocrinol Metab 84, 4324-4331 (1999); G. Wilding, Cancer Surv 14, 113-130 (1992)). Castration of adult males causes involution of the prostate and apoptosis of prostatic epithelium while eliciting no effect on other male external genitalia (E. M. Bruckheimer & N. Kyprianou, Cell Tissue Res 301, 153-162 (2000); J. T. Isaacs, Prostate 5, 545-557 (1984)). This dependency on androgens provides the underlying rationale for treating prostate cancer with chemical or surgical castration (androgen ablation).
Androgens also play a role in female diseases such as polycystic ovary syndrome as well as cancers. One example is ovarian cancer where elevated levels of androgens are associated with an increased risk of developing ovarian cancer (K. J. Helzlsouer, A. J. Alberg, G. B. Gordon, C. Longcope, T. L. Bush, S. C. Hoffman & G. W. Comstock, JAMA 274, 1926-1930 (1995); R. J. Edmondson, J. M. Monaghan & B. R. Davies, Br J Cancer 86, 879-885 (2002)). The AR has been detected in a majority of ovarian cancers (H. A. Risch, J Natl Cancer Inst 90, 1774-1786 (1998); B. R. Rao & B. J. Slotman, Endocr Rev 12, 14-26 (1991); G. M. Clinton & W. Hua, Crit Rev Oncol Hematol 25, 1-9 (1997)), whereas estrogen receptor-alpha (ERa) and the progesterone receptor are detected in less than 50% of ovarian tumors.
The only effective treatment available for advanced prostate cancer is the withdrawal of androgens which are essential for the survival of prostate epithelial cells. Androgen ablation therapy causes a temporary reduction in tumor burden concomitant with a decrease in serum prostate-specific antigen (PSA). Unfortunately prostate cancer can eventually grow again in the absence of testicular androgens (castration-resistant disease) (Huber et al 1987 Scand J Urol Nephrol. 104, 33-39). Castration-resistant prostate cancer is biochemically characterized before the onset of symptoms by a rising titre of serum PSA (Miller et al 1992 J. Urol. 147, 956-961). Once the disease becomes castration-resistant most patients succumb to their disease within two years.
The AR has distinct functional domains that include the carboxy-terminal ligand-binding domain (LBD), a DNA-binding domain (DBD) comprising two zinc finger motifs, and an N-terminus domain (NTD) that contains one or more transcriptional activation domains. Binding of androgen (ligand) to the LBD of the AR results in its activation such that the receptor can effectively bind to its specific DNA consensus site, termed the androgen response element (ARE), on the promoter and enhancer regions of “normally” androgen regulated genes, such as PSA, to initiate transcription. The AR can be activated in the absence of androgen by stimulation of the cAMP-dependent protein kinase (PKA) pathway, with interleukin-6 (IL-6) and by various growth factors (Culig et al 1994 Cancer Res. 54, 5474-5478; Nazareth et al 1996 J Biol. Chem. 271, 19900-19907; Sadar 1999 J Biol. Chem. 274, 7777-7783; Ueda et al 2002 A J. Biol. Chem. 277, 7076-7085; and Ueda et al 2002 B J Biol. Chem. 277, 38087-38094). The mechanism of ligand-independent transformation of the AR has been shown to involve: 1) increased nuclear AR protein suggesting nuclear translocation; 2) increased AR/ARE complex formation; and 3) the AR-NTD (Sadar 1999 J Biol. Chem. 274, 7777-7783; Ueda et al 2002 A J. Biol. Chem. 277, 7076-7085; and Ueda et al 2002 B J Biol. Chem. 277, 38087-38094). The AR may be activated in the absence of testicular androgens by alternative signal transduction pathways in castration-resistant disease, which is consistent with the finding that nuclear AR protein is present in secondary prostate cancer tumors (Kim et al 2002 Am. J. Pathol. 160, 219-226; and van der Kwast et al 1991 Inter. J. Cancer 48, 189-193).
Available inhibitors of the AR include nonsteroidal antiandrogens such as bicalutamide (CasodexTM), nilutamide, flutamide, enzulutamide and investigational drug ARN-509 and steroidal antiandrogens, such as cyproterone acetate. These antiandrogens target the LBD of the AR and predominantly fail presumably due to poor affinity and mutations that lead to activation of the AR by these same antiandrogens (Taplin, M. E., Bubley, G. J., Kom Y. J., Small E. J., Uptonm M., Rajeshkumarm B., Balkm S. P., Cancer Res., 59, 2511-2515 (1999)). These antiandrogens would also have no effect on the recently discovered AR splice variants that lack the ligand-binding domain (LBD) to result in a constitutively active receptor which promotes progression of castration recurrent prostate cancer (Dehm S M, Schmidt L J, Heemers H V, Vessella R L, Tindall D J., Cancer Res 68, 5469-77, 2008; Guo Z, Yang X, Sun F, Jiang R, Linn D E, Chen H, Chen H, Kong X, Melamed J, Tepper C G, Kung H J, Brodie A M, Edwards J, Qiu Y., Cancer Res. 69, 2305-13, 2009; Hu et al 2009 Cancer Res. 69, 16-22; Sun et al 2010 J Clin Invest. 2010 120, 2715-30).
Conventional therapy has concentrated on androgen-dependent activation of the AR through its C-terminal domain. Studies developing antagonists to the AR have concentrated on the C-terminus and specifically: 1) the allosteric pocket and AF-2 activity (Estébanez-Perpiñá et al 2007, PNAS 104, 16074-16079); 2) in silico “drug repurposing” procedure for identification of nonsteroidal antagonists (Bisson et al 2007, PNAS 104, 11927-11932); and coactivator or corepressor interactions (Chang et al 2005, Mol Endocrinology 19, 2478-2490; Hur et al 2004, PLoS Biol 2, E274; Estébanez-Perpiñá et al 2005, JBC 280, 8060-8068; He et al 2004, Mol Cell 16, 425-438).
The AR-NTD is also a target for drug development (e.g. WO 2000/001813), since the NTD contains Activation-Function-1 (AF-1) which is the essential region required for AR transcriptional activity (Jenster et al 1991. Mol Endocrinol. 5, 1396-404). The AR-NTD importantly plays a role in activation of the AR in the absence of androgens (Sadar, M. D. 1999 J. Biol. Chem. 274, 7777-7783; Sadar M D et al 1999 Endocr Relat Cancer. 6, 487-502; Ueda et al 2002 J. Biol. Chem. 277, 7076-7085; Ueda 2002 J. Biol. Chem. 277, 38087-38094; Blaszczyk et al 2004 Clin Cancer Res. 10, 1860-9; Dehm et al 2006 J Biol Chem. 28, 27882-93; Gregory et al 2004 J Biol Chem. 279, 7119-30). The AR-NTD is important in hormonal progression of prostate cancer as shown by application of decoy molecules (Quayle et al 2007, Proc Natl Acad Sci USA. 104,1331-1336).
While the crystal structure has been resolved for the AR C-terminus LBD, this has not been the case for the NTD due to its high flexibility and intrinsic disorder in solution (Reid et al 2002 J. Biol. Chem. 277, 20079-20086) thereby hampering virtual docking drug discovery approaches. Compounds that modulate AR include the bis-phenol compounds disclosed in published PCT Nos: WO 2010/000066, WO 2011/082487; WO 2011/082488; WO 2012/145330; WO 2012/139039; WO 2012/145328; WO 2013/028572; WO 2013/028791; WO 2014/179867 and WO 2015/031984,which are hereby incorporated by reference in their entireties, to the British Columbia Cancer Agency Branch and The University of British Columbia.
BRIEF SUMMARY
The present disclosure is based in part on the discovery that the compounds described herein, may be used to modulate AR activity either in vivo or in vitro for both research and therapeutic uses. In accordance with one embodiment, there is provided a compound having a structure of Formula I:




or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein R1, R2, L1, L2, L3, X, a, b, c, n, and m are as defined herein, are provided.

In other embodiments pharmaceutical compositions comprising a compound of Formula I are provided. Methods for modulating AR activity employing the present compounds and pharmaceutical compositions are also provided.
These and other aspects of the invention will be apparent upon reference to the following detailed description. To this end, various references are set forth herein which describe in more detail certain background information, procedures, compounds and/or compositions, and are each hereby incorporated by reference in their entirety.



BRIEF DESCRIPTION OF THE DRAWINGS
In the figures, identical reference numbers identify similar elements. The sizes and relative positions of elements in the figures are not necessarily drawn to scale and some of these elements are arbitrarily enlarged and positioned to improve figure legibility. Further, the particular shapes of the elements as drawn are not intended to convey any information regarding the actual shape of the particular elements, and have been solely selected for ease of recognition in the figures.
FIGS. 1A and 1B shows the 1H NMR (nuclear magnetic resonance spectroscopy) and the 13C NMR spectra for Compound 1a, respectively.
FIG. 2 shows the 13C NMR spectrum for (S)-4-((4-(2-(4-((S)-2-chloro-3-(triphenyl-14-oxidanyl)propoxy)phenyl)propan-2-yl)phenoxy)methyl)-2,2-dimethyl-1,3-dioxolane.
FIGS. 3A and 3B shows the 1H NMR and the 13C NMR spectra for (S)-1-(4-(2-(4-(((S)-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)propan-2-yl)phenoxy)-3-(triphenyl-14-oxidanyl)propan-2-ol, respectively.
FIGS. 4A and 4B shows the 1H NMR and the 13C NMR spectra for (R)-3-(4-(2-(4-(((S)-2,2-dimethyl -1,3-dioxolan-4-yl)methoxy)phenyl)propan-2-yl)phenoxy)propane-1,2-diol, respectively.
FIGS. 5A and 5B shows the 1H NMR and the 13C NMR spectra for Compound 1c, respectively.



DETAILED DESCRIPTION
I. Definitions
In the following description, certain specific details are set forth in order to provide a thorough understanding of various embodiments. However, one skilled in the art will understand that the invention may be practiced without these details. In other instances, well-known structures have not been shown or described in detail to avoid unnecessarily obscuring descriptions of the embodiments. Unless the context requires otherwise, throughout the specification and claims which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense, that is, as “including, but not limited to.” Further, headings provided herein are for convenience only and do not interpret the scope or meaning of the claimed invention.
Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Also, as used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the content clearly dictates otherwise. It should also be noted that the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise.
The terms below, as used herein, have the following meanings, unless indicated otherwise:
“Amino” refers to the —NH2 radical.
“Cyano” refers to the —CN radical.
“Halo” or “halogen” refers to bromo, chloro, fluoro or iodo radical. “Halo” or “halogen” can also refer to radioactive isotopes of the elements listed above, e.g., 123I and 18F.
“Hydroxy” or “hydroxyl” refers to the —OH radical.
“Imino” refers to the ═NH substituent.
“Nitro” refers to the —NO2 radical.
“Oxo” refers to the ═O substituent.
“Thioxo” refers to the ═S substituent.
“Alkyl” or “alkyl group” refers to a fully saturated, straight or branched hydrocarbon chain radical having from one to twelve carbon atoms, and which is attached to the rest of the molecule by a single bond. Alkyls comprising any number of carbon atoms from 1 to 12 are included. An alkyl comprising up to 12 carbon atoms is a C1-C12 alkyl, an alkyl comprising up to 10 carbon atoms is a C1-C10 alkyl, an alkyl comprising up to 6 carbon atoms is a C1-C6 alkyl and an alkyl comprising up to 5 carbon atoms is a C1-C5 alkyl. A C1-C5 alkyl includes C5 alkyls, C4 alkyls, C3 alkyls, C2 alkyls and C1 alkyl (i.e., methyl). A C1-C6 alkyl includes all moieties described above for C1-C5 alkyls but also includes C6 alkyls. A C1-C10 alkyl includes all moieties described above for C1-C5 alkyls and C1-C6 alkyls, but also includes C7, C8, C9 and C10 alkyls. Similarly, a C1-C12 alkyl includes all the foregoing moieties, but also includes C11 and C12 alkyls. Non-limiting examples of C1-C12 alkyl include methyl, ethyl, n-propyl, sec-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, and n-dodecyl. Unless stated otherwise specifically in the specification, an alkyl group can be optionally substituted.
“Alkylene” or “alkylene chain” refers to a fully saturated, straight or branched divalent hydrocarbon chain radical, and having from one to twelve carbon atoms. Non-limiting examples of C1-C12 alkylene include methylene, ethylene, propylene, n-butylene, ethenylene, propenylene, n-butenylene, propynylene, n-butynylene, and the like. The alkylene chain is attached to the rest of the molecule through a single bond and to the radical group through a single bond. The points of attachment of the alkylene chain to the rest of the molecule and to the radical group can be through one carbon or any two carbons within the chain. Unless stated otherwise specifically in the specification, an alkylene chain can be optionally substituted.
“Alkenyl” or “alkenyl group” refers to a straight or branched hydrocarbon chain radical having from two to twelve carbon atoms, and having one or more carbon-carbon double bonds. Each alkenyl group is attached to the rest of the molecule by a single bond. Alkenyl group comprising any number of carbon atoms from 2 to 12 are included. An alkenyl group comprising up to 12 carbon atoms is a C2-C12 alkenyl, an alkenyl comprising up to 10 carbon atoms is a C2-C10 alkenyl, an alkenyl group comprising up to 6 carbon atoms is a C2-C6 alkenyl and an alkenyl comprising up to 5 carbon atoms is a C2-C5 alkenyl. A C2-C5 alkenyl includes C5 alkenyls, C4 alkenyls, C3 alkenyls, and C2 alkenyls. A C2-C6 alkenyl includes all moieties described above for C2-C5 alkenyls but also includes C6 alkenyls. A C2-C10 alkenyl includes all moieties described above for C2-C5 alkenyls and C2-C6 alkenyls, but also includes C7, C8, C9 and C10 alkenyls. Similarly, a C2-C12 alkenyl includes all the foregoing moieties, but also includes C11 and C12 alkenyls. Non-limiting examples of C2-C12 alkenyl include ethenyl (vinyl), 1-propenyl, 2-propenyl (allyl), iso-propenyl, 2-methyl-1-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, 5-hexenyl, 1-heptenyl, 2-heptenyl, 3-heptenyl, 4-heptenyl, 5-heptenyl, 6-heptenyl, 1-octenyl, 2-octenyl, 3-octenyl, 4-octenyl, 5-octenyl, 6-octenyl, 7-octenyl, 1-nonenyl, 2-nonenyl, 3-nonenyl, 4-nonenyl, 5-nonenyl, 6-nonenyl, 7-nonenyl, 8-nonenyl, 1-decenyl, 2-decenyl, 3-decenyl, 4-decenyl, 5-decenyl, 6-decenyl, 7-decenyl, 8-decenyl, 9-decenyl, 1-undecenyl, 2-undecenyl, 3-undecenyl, 4-undecenyl, 5-undecenyl, 6-undecenyl, 7-undecenyl, 8-undecenyl, 9-undecenyl, 10-undecenyl, 1-dodecenyl, 2-dodecenyl, 3-dodecenyl, 4-dodecenyl, 5-dodecenyl, 6-dodecenyl, 7-dodecenyl, 8-dodecenyl, 9-dodecenyl, 10-dodecenyl, and 11-dodecenyl. Unless stated otherwise specifically in the specification, an alkyl group can be optionally substituted.
“Alkenylene” or “alkenylene chain” refers to a straight or branched divalent hydrocarbon chain radical, having from two to twelve carbon atoms, and having one or more carbon-carbon double bonds. Non-limiting examples of C2-C12 alkenylene include ethene, propene, butene, and the like. The alkenylene chain is attached to the rest of the molecule through a single bond and to the radical group through a single bond. The points of attachment of the alkenylene chain to the rest of the molecule and to the radical group can be through one carbon or any two carbons within the chain. Unless stated otherwise specifically in the specification, an alkenylene chain can be optionally substituted.
“Alkynyl” or “alkynyl group” refers to a straight or branched hydrocarbon chain radical having from two to twelve carbon atoms, and having one or more carbon-carbon triple bonds. Each alkynyl group is attached to the rest of the molecule by a single bond. Alkynyl group comprising any number of carbon atoms from 2 to 12 are included. An alkynyl group comprising up to 12 carbon atoms is a C2-C12 alkynyl, an alkynyl comprising up to 10 carbon atoms is a C2-C10 alkynyl, an alkynyl group comprising up to 6 carbon atoms is a C2-C6 alkynyl and an alkynyl comprising up to 5 carbon atoms is a C2-C5 alkynyl. A C2-C5 alkynyl includes C5 alkynyls, C4 alkynyls, C3 alkynyls, and C2 alkynyls. A C2-C6 alkynyl includes all moieties described above for C2-C5 alkynyls but also includes C6 alkynyls. A C2-C10 alkynyl includes all moieties described above for C2-C5 alkynyls and C2-C6 alkynyls, but also includes C7, C8, C9 and C10 alkynyls. Similarly, a C2-C12 alkynyl includes all the foregoing moieties, but also includes C11 and C12 alkynyls. Non-limiting examples of C2-C12 alkenyl include ethynyl, propynyl, butynyl, pentynyl and the like. Unless stated otherwise specifically in the specification, an alkyl group can be optionally substituted.
“Alkynylene” or “alkynylene chain” refers to a straight or branched divalent hydrocarbon chain radical, having from two to twelve carbon atoms, and having one or more carbon-carbon triple bonds. Non-limiting examples of C2-C12 alkynylene include ethynylene, propargylene and the like. The alkynylene chain is attached to the rest of the molecule through a single bond and to the radical group through a single bond. The points of attachment of the alkynylene chain to the rest of the molecule and to the radical group can be through one carbon or any two carbons within the chain. Unless stated otherwise specifically in the specification, an alkynylene chain can be optionally substituted.
“Alkoxy” refers to a radical of the formula —ORa where Ra is an alkyl, alkenyl or alknyl radical as defined above containing one to twelve carbon atoms. Unless stated otherwise specifically in the specification, an alkoxy group can be optionally substituted.
“Alkylamino” refers to a radical of the formula —NHRa or —NRaRa where each Ra is, independently, an alkyl, alkenyl or alkynyl radical as defined above containing one to twelve carbon atoms. Unless stated otherwise specifically in the specification, an alkylamino group can be optionally substituted.
“Alkylcarbonyl” refers to the —C(═O)Ra moiety, wherein Ra is an alkyl, alkenyl or alkynyl radical as defined above. A non-limiting example of an alkyl carbonyl is the methyl carbonyl (“acetal”) moiety. Alkylcarbonyl groups can also be referred to as “Cw-Cz acyl” where w and z depicts the range of the number of carbon in Ra, as defined above. For example, “C1-C10 acyl” refers to alkylcarbonyl group as defined above, where Ra is C1-C10 alkyl, C1-C10 alkenyl, or C1-C10 alkynyl radical as defined above. Unless stated otherwise specifically in the specification, an alkyl carbonyl group can be optionally substituted.
“Aryl” refers to a hydrocarbon ring system radical comprising hydrogen, 6 to 18 carbon atoms and at least one aromatic ring. For purposes of this invention, the aryl radical can be a monocyclic, bicyclic, tricyclic or tetracyclic ring system, which can include fused or bridged ring systems. Aryl radicals include, but are not limited to, aryl radicals derived from aceanthrylene, acenaphthylene, acephenanthrylene, anthracene, azulene, benzene, chrysene, fluoranthene, fluorene, as-indacene, s-indacene, indane, indene, naphthalene, phenalene, phenanthrene, pleiadene, pyrene, and triphenylene. Unless stated otherwise specifically in the specification, the term “aryl” is meant to include aryl radicals that are optionally substituted.
“Aralkyl” refers to a radical of the formula —Rb-Rc where Rb is an alkylene, alkenylene or alkynylene group as defined above and Rc is one or more aryl radicals as defined above, for example, benzyl, diphenylmethyl and the like. Unless stated otherwise specifically in the specification, an aralkyl group can be optionally substituted.
“Carbocyclyl,” “carbocyclic ring” or “carbocycle” refers to a rings structure, wherein the atoms which form the ring are each carbon. Carbocyclic rings can comprise from 3 to 20 carbon atoms in the ring. Carbocyclic rings include aryls and cycloalkyl. cycloalkenyl and cycloalkynyl as defined herein. Unless stated otherwise specifically in the specification, a carbocyclyl group can be optionally substituted.
“Cycloalkyl” refers to a stable non-aromatic monocyclic or polycyclic fully saturated hydrocarbon radical consisting solely of carbon and hydrogen atoms, which can include fused or bridged ring systems, having from three to twenty carbon atoms, preferably having from three to ten carbon atoms, and which is attached to the rest of the molecule by a single bond. Monocyclic cycloalkyl radicals include, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl. Polycyclic cycloalkyl radicals include, for example, adamantyl, norbornyl, decalinyl, 7,7-dimethyl-bicyclo[2.2.1]heptanyl, and the like. Unless otherwise stated specifically in the specification, a cycloalkyl group can be optionally substituted.
“Cycloalkenyl” refers to a stable non-aromatic monocyclic or polycyclic hydrocarbon radical consisting solely of carbon and hydrogen atoms, having one or more carbon-carbon double bonds, which can include fused or bridged ring systems, having from three to twenty carbon atoms, preferably having from three to ten carbon atoms, and which is attached to the rest of the molecule by a single bond. Monocyclic cycloalkenyl radicals include, for example, cyclopentenyl, cyclohexenyl, cycloheptenyl, cycloctenyl, and the like. Polycyclic cycloalkenyl radicals include, for example, bicyclo[2.2.1]hept-2-enyl and the like. Unless otherwise stated specifically in the specification, a cycloalkenyl group can be optionally substituted.
“Cycloalkynyl” refers to a stable non-aromatic monocyclic or polycyclic hydrocarbon radical consisting solely of carbon and hydrogen atoms, having one or more carbon-carbon triple bonds, which can include fused or bridged ring systems, having from three to twenty carbon atoms, preferably having from three to ten carbon atoms, and which is attached to the rest of the molecule by a single bond. Monocyclic cycloalkynyl radicals include, for example, cycloheptynyl, cyclooctynyl, and the like. Unless otherwise stated specifically in the specification, a cycloalkynyl group can be optionally substituted.
“Cycloalkylalkyl” refers to a radical of the formula —Rb-Rd where Rb is an alkylene, alkenylene, or alkynylene group as defined above and Rd is a cycloalkyl, cycloalkenyl, cycloalkynyl radical as defined above. Unless stated otherwise specifically in the specification, a cycloalkylalkyl group can be optionally substituted.
“Chlorohydrin” refers to a radical having one of the following formulae:




“Protected chlorohydrin” refers to the above radical wherein the hydroxyl group is protected by a protecting group commonly known in the art to form, e.g., acetic acid ester (acetate), pivalic acid ester (pivalate) benzoid acid ester (benzoate), t-butyl ether, methoxymethyl ether, tetrahydropyranyl ether, allyl ether, benzyl ether, t-butyldimethylsilyl ether, t-butylphenylsilyl ether; (PG=protecting group):





“Haloalkyl” refers to an alkyl radical, as defined above, that is substituted by one or more halo radicals, as defined above, e.g., trifluoromethyl, difluoromethyl, trichloromethyl, 2,2,2-trifluoroethyl, 1,2-difluoroethyl, 3-bromo-2-fluoropropyl, 1,2-dibromoethyl, and the like. Unless stated otherwise specifically in the specification, a haloalkyl group can be optionally substituted.
“Haloalkenyl” refers to an alkenyl radical, as defined above, that is substituted by one or more halo radicals, as defined above, e.g., 1-fluoropropenyl, 1,1-difluorobutenyl, and the like. Unless stated otherwise specifically in the specification, a haloalkenyl group can be optionally substituted.
“Haloalkynyl” refers to an alkynyl radical, as defined above, that is substituted by one or more halo radicals, as defined above, e.g., 1-fluoropropynyl, 1-fluorobutynyl, and the like. Unless stated otherwise specifically in the specification, a haloalkenyl group can be optionally substituted.
“Heterocyclyl,” “heterocyclic ring” or “heterocycle” refers to a stable 3- to 20-membered non-aromatic ring radical which consists of two to twelve carbon atoms and from one to six heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur. Heterocyclycl or heterocyclic rings include heteroaryls as defined below. Unless stated otherwise specifically in the specification, the heterocyclyl radical can be a monocyclic, bicyclic, tricyclic or tetracyclic ring system, which can include fused or bridged ring systems; and the nitrogen, carbon or sulfur atoms in the heterocyclyl radical can be optionally oxidized; the nitrogen atom can be optionally quaternized; and the heterocyclyl radical can be partially or fully saturated. Examples of such heterocyclyl radicals include, but are not limited to, dioxolanyl, thienyl[1,3]dithianyl, decahydroisoquinolyl, imidazolinyl, imidazolidinyl, isothiazolidinyl, isoxazolidinyl, morpholinyl, octahydroindolyl, octahydroisoindolyl, 2-oxopiperazinyl, 2-oxopiperidinyl, 2-oxopyrrolidinyl, oxazolidinyl, piperidinyl, piperazinyl, 4-piperidonyl, pyrrolidinyl, pyrazolidinyl, quinuclidinyl, thiazolidinyl, tetrahydrofuryl, trithianyl, tetrahydropyranyl, thiomorpholinyl, thiamorpholinyl, 1-oxo-thiomorpholinyl, and 1,1-dioxo-thiomorpholinyl. Unless stated otherwise specifically in the specification, a heterocyclyl group can be optionally substituted.
“N-heterocyclyl” refers to a heterocyclyl radical as defined above containing at least one nitrogen and where the point of attachment of the heterocyclyl radical to the rest of the molecule is through a nitrogen atom in the heterocyclyl radical. Unless stated otherwise specifically in the specification, a N-heterocyclyl group can be optionally substituted.
“Heterocyclylalkyl” refers to a radical of the formula —Rb-Re where Rb is an alkylene, alkenylene, or alkynylene chain as defined above and Re is a heterocyclyl radical as defined above, and if the heterocyclyl is a nitrogen-containing heterocyclyl, the heterocyclyl can be attached to the alkyl, alkenyl, alkynyl radical at the nitrogen atom. Unless stated otherwise specifically in the specification, a heterocyclylalkyl group can be optionally substituted.
“Heteroaryl” refers to a 5- to 20-membered ring system radical comprising hydrogen atoms, one to thirteen carbon atoms, one to six heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur, and at least one aromatic ring. For purposes of this invention, the heteroaryl radical can be a monocyclic, bicyclic, tricyclic or tetracyclic ring system, which can include fused or bridged ring systems; and the nitrogen, carbon or sulfur atoms in the heteroaryl radical can be optionally oxidized; the nitrogen atom can be optionally quaternized. Examples include, but are not limited to, azepinyl, acridinyl, benzimidazolyl, benzothiazolyl, benzindolyl, benzodioxolyl, benzofuranyl, benzooxazolyl, benzothiazolyl, benzothiadiazolyl, benzo[b][1,4]dioxepinyl, 1,4-benzodioxanyl, benzonaphthofuranyl, benzoxazolyl, benzodioxolyl, benzodioxinyl, benzopyranyl, benzopyranonyl, benzofuranyl, benzofuranonyl, benzothienyl (benzothiophenyl), benzotriazolyl, benzo[4,6]imidazo[1,2-a]pyridinyl, carbazolyl, cinnolinyl, dibenzofuranyl, dibenzothiophenyl, furanyl, furanonyl, isothiazolyl, imidazolyl, indazolyl, indolyl, indazolyl, isoindolyl, indolinyl, isoindolinyl, isoquinolyl, indolizinyl, isoxazolyl, naphthyridinyl, oxadiazolyl, 2-oxoazepinyl, oxazolyl, oxiranyl, 1-oxidopyridinyl, 1-oxidopyrimidinyl, 1-oxidopyrazinyl, 1-oxidopyridazinyl, 1-phenyl-1H-pyrrolyl, phenazinyl, phenothiazinyl, phenoxazinyl, phthalazinyl, pteridinyl, purinyl, pyrrolyl, pyrazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, quinazolinyl, quinoxalinyl, quinolinyl, quinuclidinyl, isoquinolinyl, tetrahydroquinolinyl, thiazolyl, thiadiazolyl, triazolyl, tetrazolyl, triazinyl, and thiophenyl (i.e. thienyl). Unless stated otherwise specifically in the specification, a heteroaryl group can be optionally substituted.
“N-heteroaryl” refers to a heteroaryl radical as defined above containing at least one nitrogen and where the point of attachment of the heteroaryl radical to the rest of the molecule is through a nitrogen atom in the heteroaryl radical. Unless stated otherwise specifically in the specification, an N-heteroaryl group can be optionally substituted.
“Heteroarylalkyl” refers to a radical of the formula —Rb-Rf where Rb is an alkylene, alkenylene, or alkynylene chain as defined above and Rf is a heteroaryl radical as defined above. Unless stated otherwise specifically in the specification, a heteroarylalkyl group can be optionally substituted.
“Thioalkyl” refers to a radical of the formula —SRa where Ra is an alkyl, alkenyl, or alkynyl radical as defined above containing one to twelve carbon atoms. Unless stated otherwise specifically in the specification, a thioalkyl group can be optionally substituted.
The term “substituted” used herein means any of the above groups (i.e., alkyl, alkylene, alkenyl, alkenylene, alkynyl, alkynylene, alkoxy, alkylamino, alkylcarbonyl, thioalkyl, aryl, aralkyl, carbocyclyl, cycloalkyl, cycloalkenyl, cycloalkynyl, cycloalkylalkyl, haloalkyl, heterocyclyl, N-heterocyclyl, heterocyclylalkyl, heteroaryl, N-heteroaryl and/or heteroarylalkyl) wherein at least one hydrogen atom is replaced by a bond to a non-hydrogen atoms such as, but not limited to: a halogen atom such as F, Cl, Br, and I; an oxygen atom in groups such as hydroxyl groups, alkoxy groups, and ester groups; a sulfur atom in groups such as thiol groups, thioalkyl groups, sulfone groups, sulfonyl groups, and sulfoxide groups; a nitrogen atom in groups such as amines, amides, alkylamines, dialkylamines, arylamines, alkylarylamines, diarylamines, N-oxides, imides, and enamines; a silicon atom in groups such as trialkylsilyl groups, dialkylarylsilyl groups, alkyldiarylsilyl groups, and triarylsilyl groups; and other heteroatoms in various other groups. “Substituted” also means any of the above groups in which one or more hydrogen atoms are replaced by a higher-order bond (e.g., a double- or triple-bond) to a heteroatom such as oxygen in oxo, carbonyl, carboxyl, and ester groups; and nitrogen in groups such as imines, oximes, hydrazones, and nitriles. For example, “substituted” includes any of the above groups in which one or more hydrogen atoms are replaced with NRgRh, NRgC(═O)Rh, NRgC(═O )NRgRh, NRgC(═O)ORh, NRgSO2Rh, OC(═O)NRgRh, ORg, SRg, SORg, SO2Rg, OSO2Rg, SO2ORg, ═NSO2Rg, and SO2NRgRh. “Substituted also means any of the above groups in which one or more hydrogen atoms are replaced with C(═O)Rg, C(═O)ORg, C(═O)NRgRh, CH2SO2Rg, CH2SO2NRgRh. In the foregoing, Rg and Rh are the same or different and independently hydrogen, alkyl, alkenyl, alkynyl, alkoxy, alkylamino, thioalkyl, aryl, aralkyl, cycloalkyl, cycloalkenyl, cycloalkynyl, cycloalkylalkyl, haloalkyl, haloalkenyl, haloalkynyl, heterocyclyl, N-heterocyclyl, heterocyclylalkyl, heteroaryl, N-heteroaryl and/or heteroarylalkyl. “Substituted” further means any of the above groups in which one or more hydrogen atoms are replaced by a bond to an amino, cyano, hydroxyl, imino, nitro, oxo, thioxo, halo, alkyl, alkenyl, alkynyl, alkoxy, alkylamino, thioalkyl, aryl, aralkyl, cycloalkyl, cycloalkenyl, cycloalkynyl, cycloalkylalkyl, haloalkyl, haloalkenyl, haloalkynyl, heterocyclyl, N-heterocyclyl, heterocyclylalkyl, heteroaryl, N-heteroaryl and/or heteroarylalkyl group. In addition, each of the foregoing substituents can also be optionally substituted with one or more of the above substituents.
As used herein, the symbol




(hereinafter may be referred to as “a point of attachment bond”) denotes a bond that is a point of attachment between two chemical entities, one of which is depicted as being attached to the point of attachment bond and the other of which is not depicted as being attached to the point of attachment bond. For example,





indicates that the chemical entity “XY” is bonded to another chemical entity via the point of attachment bond. Furthermore, the specific point of attachment to the non-depicted chemical entity may be specified by inference. For example, the compound CH3-Rj, wherein Rj is H or





infers that when Rj is “XY”, the point of attachment bond is the same bond as the bond by which Rj is depicted as being bonded to CH3.

“Fused” refers to any ring structure described herein which is fused to an existing ring structure in the compounds of the invention. When the fused ring is a heterocyclyl ring or a heteroaryl ring, any carbon atom on the existing ring structure which becomes part of the fused heterocyclyl ring or the fused heteroaryl ring may be replaced with a nitrogen atom.
The invention disclosed herein is also meant to encompass the in vivo metabolic products of the disclosed compounds. Such products may result from, for example, the oxidation, reduction, hydrolysis, amidation, esterification, and the like of the administered compound, primarily due to enzymatic processes. Accordingly, the invention includes compounds produced by a process comprising administering a compound of this invention to a mammal for a period of time sufficient to yield a metabolic product thereof. Such products are typically identified by administering a radiolabelled compound of the invention in a detectable dose to an animal, such as rat, mouse, guinea pig, monkey, or to human, allowing sufficient time for metabolism to occur, and isolating its conversion products from the urine, blood or other biological samples.
“Stable compound” and “stable structure” are meant to indicate a compound that is sufficiently robust to survive isolation to a useful degree of purity from a reaction mixture, and formulation into an efficacious therapeutic agent.
As used herein, a “subject” may be a human, non-human primate, mammal, rat, mouse, cow, horse, pig, sheep, goat, dog, cat and the like. The subject may be suspected of having or at risk for having a cancer, such as prostate cancer, breast cancer, ovarian cancer, salivary gland carcinoma, or endometrial cancer, or suspected of having or at risk for having acne, hirsutism, alopecia, benign prostatic hyperplasia, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, or age-related macular degeneration. Diagnostic methods for various cancers, such as prostate cancer, breast cancer, ovarian cancer, salivary gland carcinoma, or endometrial cancer, and diagnostic methods for acne, hirsutism, alopecia, benign prostatic hyperplasia, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, or age-related macular degeneration and the clinical delineation of cancer, such as prostate cancer, breast cancer, ovarian cancer, salivary gland carcinoma, or endometrial cancer, diagnoses and the clinical delineation of acne, hirsutism, alopecia, benign prostatic hyperplasia, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, or age-related macular degeneration are known to those of ordinary skill in the art.
“Mammal” includes humans and both domestic animals such as laboratory animals and household pets (e.g., cats, dogs, swine, cattle, sheep, goats, horses, rabbits), and non-domestic animals such as wildlife and the like.
“Optional” or “optionally” means that the subsequently described event of circumstances may or may not occur, and that the description includes instances where said event or circumstance occurs and instances in which it does not. For example, “optionally substituted aryl” means that the aryl radical may or may not be substituted and that the description includes both substituted aryl radicals and aryl radicals having no substitution.
“Pharmaceutically acceptable carrier, diluent or excipient” includes without limitation any adjuvant, carrier, excipient, glidant, sweetening agent, diluent, preservative, dye/colorant, flavor enhancer, surfactant, wetting agent, dispersing agent, suspending agent, stabilizer, isotonic agent, solvent, or emulsifier which has been approved by the United States Food and Drug Administration as being acceptable for use in humans or domestic animals.
“Pharmaceutically acceptable salt” includes both acid and base addition salts. “Pharmaceutically acceptable acid addition salt” refers to those salts which retain the biological effectiveness and properties of the free bases, which are not biologically or otherwise undesirable, and which are formed with inorganic acids such as, but are not limited to, hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like, and organic acids such as, but not limited to, acetic acid, 2,2-dichloroacetic acid, adipic acid, alginic acid, ascorbic acid, aspartic acid, benzenesulfonic acid, benzoic acid, 4-acetamidobenzoic acid, camphoric acid, camphor-10-sulfonic acid, capric acid, caproic acid, caprylic acid, carbonic acid, cinnamic acid, citric acid, cyclamic acid, dodecylsulfuric acid, ethane-1,2-disulfonic acid, ethanesulfonic acid, 2-hydroxyethanesulfonic acid, formic acid, fumaric acid, galactaric acid, gentisic acid, glucoheptonic acid, gluconic acid, glucuronic acid, glutamic acid, glutaric acid, 2-oxo-glutaric acid, glycerophosphoric acid, glycolic acid, hippuric acid, isobutyric acid, lactic acid, lactobionic acid, lauric acid, maleic acid, malic acid, malonic acid, mandelic acid, methanesulfonic acid, mucic acid, naphthalene-1,5-disulfonic acid, naphthalene-2-sulfonic acid, 1-hydroxy-2-naphthoic acid, nicotinic acid, oleic acid, orotic acid, oxalic acid, palmitic acid, pamoic acid, propionic acid, pyroglutamic acid, pyruvic acid, salicylic acid, 4-aminosalicylic acid, sebacic acid, stearic acid, succinic acid, tartaric acid, thiocyanic acid, p-toluenesulfonic acid, trifluoroacetic acid, undecylenic acid, and the like.
“Pharmaceutically acceptable base addition salt” refers to those salts which retain the biological effectiveness and properties of the free acids, which are not biologically or otherwise undesirable. These salts are prepared from addition of an inorganic base or an organic base to the free acid. Salts derived from inorganic bases include, but are not limited to, the sodium, potassium, lithium, ammonium, calcium, magnesium, iron, zinc, copper, manganese, aluminum salts and the like. Preferred inorganic salts are the ammonium, sodium, potassium, calcium, and magnesium salts. Salts derived from organic bases include, but are not limited to, salts of primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines and basic ion exchange resins, such as ammonia, isopropylamine, trimethylamine, diethylamine, triethylamine, tripropylamine, diethanolamine, ethanolamine, deanol, 2-dimethylaminoethanol, 2-diethylaminoethanol, dicyclohexylamine, lysine, arginine, histidine, caffeine, procaine, hydrabamine, choline, betaine, benethamine, benzathine, ethylenediamine, glucosamine, methylglucamine, theobromine, triethanolamine, tromethamine, purines, piperazine, piperidine, N-ethylpiperidine, polyamine resins and the like. Particularly preferred organic bases are isopropylamine, diethylamine, ethanolamine, trimethylamine, dicyclohexylamine, choline and caffeine.
Often crystallizations produce a solvate of the compound of the invention. As used herein, the term “solvate” refers to an aggregate that comprises one or more molecules of a compound of the invention with one or more molecules of solvent. The solvent may be water, in which case the solvate may be a hydrate. Alternatively, the solvent may be an organic solvent. Thus, the compounds of the present invention may exist as a hydrate, including a monohydrate, dihydrate, hemihydrate, sesquihydrate, trihydrate, tetrahydrate and the like, as well as the corresponding solvated forms. The compound of the invention may be true solvates, while in other cases, the compound of the invention may merely retain adventitious water or be a mixture of water plus some adventitious solvent.
A “pharmaceutical composition” refers to a formulation of a compound of the invention and a medium generally accepted in the art for the delivery of the biologically active compound to mammals, e.g., humans. Such a medium includes all pharmaceutically acceptable carriers, diluents or excipients therefor.
“An “effective amount” refers to a therapeutically effective amount or a prophylactically effective amount. A “therapeutically effective amount” refers to an amount effective, at dosages and for periods of time necessary, to achieve the desired therapeutic result, such as reduced tumor size, increased life span or increased life expectancy. A therapeutically effective amount of a compound may vary according to factors such as the disease state, age, sex, and weight of the subject, and the ability of the compound to elicit a desired response in the subject. Dosage regimens may be adjusted to provide the optimum therapeutic response. A therapeutically effective amount is also one in which any toxic or detrimental effects of the compound are outweighed by the therapeutically beneficial effects. A “prophylactically effective amount” refers to an amount effective, at dosages and for periods of time necessary, to achieve the desired prophylactic result, such as smaller tumors, increased life span, increased life expectancy or prevention of the progression of prostate cancer to a castration-resistant form. Typically, a prophylactic dose is used in subjects prior to or at an earlier stage of disease, so that a prophylactically effective amount may be less than a therapeutically effective amount.
“Treating” or “treatment” as used herein covers the treatment of the disease or condition of interest in a mammal, preferably a human, having the disease or condition of interest, and includes:
(i) preventing the disease or condition from occurring in a mammal, in particular, when such mammal is predisposed to the condition but has not yet been diagnosed as having it;
(ii) inhibiting the disease or condition, i.e., arresting its development;
(iii) relieving the disease or condition, i.e., causing regression of the disease or condition; or
(iv) relieving the symptoms resulting from the disease or condition, i.e., relieving pain without addressing the underlying disease or condition. As used herein, the terms “disease” and “condition” may be used interchangeably or may be different in that the particular malady or condition may not have a known causative agent (so that etiology has not yet been worked out) and it is therefore not yet recognized as a disease but only as an undesirable condition or syndrome, wherein a more or less specific set of symptoms have been identified by clinicians.
The compounds of the invention, or their pharmaceutically acceptable salts may contain one or more asymmetric centers and may thus give rise to enantiomers, diastereomers, and other stereoisomeric forms that may be defined, in terms of absolute stereochemistry, as (R)- or (S)- or, as (D)- or (L)- for amino acids. The present invention is meant to include all such possible isomers, as well as their racemic and optically pure forms whether or not they are specifically depicted herein. Optically active (+) and (−), (R)- and (S)-, or (D)- and (L)-isomers may be prepared using chiral synthons or chiral reagents, or resolved using conventional techniques, for example, chromatography and fractional crystallization. Conventional techniques for the preparation/isolation of individual enantiomers include chiral synthesis from a suitable optically pure precursor or resolution of the racemate (or the racemate of a salt or derivative) using, for example, chiral high pressure liquid chromatography (HPLC). When the compounds described herein contain olefinic double bonds or other centers of geometric asymmetry, and unless specified otherwise, it is intended that the compounds include both E and Z geometric isomers. Likewise, all tautomeric forms are also intended to be included.
A “stereoisomer” refers to a compound made up of the same atoms bonded by the same bonds but having different three-dimensional structures, which are not interchangeable. The present invention contemplates various stereoisomers and mixtures thereof and includes “enantiomers”, which refers to two stereoisomers whose molecules are nonsuperimposable mirror images of one another.
A “tautomer” refers to a proton shift from one atom of a molecule to another atom of the same molecule. The present invention includes tautomers of any said compounds.
The chemical naming protocol and structure diagrams used herein are a modified form of the I.U.P.A.C. nomenclature system, using the ACD/Name Version 9.07 software program, ChemDraw Ultra Version 11.0.1 and/or ChemDraw Ultra Version 14.0 software naming program (CambridgeSoft). For complex chemical names employed herein, a substituent group is named before the group to which it attaches. For example, cyclopropylethyl comprises an ethyl backbone with cyclopropyl substituent. Except as described below, all bonds are identified in the chemical structure diagrams herein, except for some carbon atoms, which are assumed to be bonded to sufficient hydrogen atoms to complete the valency.
II. Compounds and Pharmaceutical Compositions
As noted above, certain embodiments of the present invention are directed to compounds useful for treatment of various cancers, including various types of prostate cancers. While not wishing to be bound by theory, it is believed that binding of the compounds to the androgen receptor (for example at the N-terminal domain) may contribute to the activity of the disclosed compounds. The compounds of the present invention relates to bisphenol ether compounds having a chlorohydrin or a protected chlorohydrin moiety which can impart improved properties to the compounds compared to compounds lacking the chlorohydrin or a protected chlorohydrin moiety (e.g., the right hand portion of a compound of Formula I). For example, the improved properties include improved drug-like properties such as improved activity (e.g., androgen receptor (AR) modulation), longer half-life (e.g., in vivo); decreased toxicity; better solubility, improved formulation, better bioavailability, better pharmacokinetic profile; reduction in unwanted metabolites and the like.
In one embodiment the invention includes compounds which can form covalent bonds with the androgen receptor (AR) (e.g., at the N-terminal domain), thus resulting in irreversible (or substantially irreversible) inhibition of the same. In this regard, the certain compounds of the present invention can be designed to include functional groups capable of forming covalent bonds with a nucleophile under certain in vivo conditions. For example, in some embodiments the reactivity of compounds of the present invention is such that they will not substantially react with various nucleophiles (e.g., glutathione) when the compounds are free in solution. However, when the free mobility of the compounds is restricted, and an appropriate nucleophile is brought into close proximity to the compound, for example when the compounds associate with, or bind to, the androgen receptor, the compounds can be capable of forming covalent bonds with certain nucleophiles (e.g., thiols).
The present invention includes all compounds which can have the above described properties (i.e., binding to androgen receptor (AR)). In one embodiment, the present invention is directed to a compound having a structure of Formula I:




or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein:

X is —O—, —S(O)0-2—, —C(═O)—, —C(OR5)2—, —C(OR5)(OC(═O)R13)—, —C(R3R4)—, —C(═CR3R4)—, —N(R5)—, —N(COR4)—, —CHNR5R6—, —C(═NR5)—, —C(═NOR5)—, —C(═N—NHR7)—;
R1 and R2 are each independently H, halogen, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, —OH, —OR5, —O(C1-C6)alkyl, —OC(═O)R13, C1-C10 acyl, —S(O)0-2R5, —NO2, —CN, —NH2, —NHR5, —N(R5R6), —CO2H, —CO2R14, or —CONR5R6;
R3 and R4 are each independently H, halogen, —S(O)0-2R14, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, aralkyl, C1-C10 acyl, or —NR5R6, or R3 and R4 may join to form a unsubstituted or substituted mono-, bi-, or tri-cyclic carbocycle or heterocycle containing from 3 to 20 carbon atoms;
R5 and R6 are each independently H, C1-C10 alkyl, C2-C10 alkenyl, or C2-C10 alkynyl;
R7 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, aminocarbonyl, C1-C10 alkylcarbonyl, C2-C10 alkenylcarbonyl, C2-C10 alkynylcarbonyl, C1-C10 alkylaminocarbonyl, C2-C10 alkenylaminocarbonyl, or C2-C10 alkynylaminocarbonyl;
R13 is each independently C1-C10 alkyl, C2-C10 alkenyl, or C2-C10 alkynyl;
R14 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or aryl;
L1 is hydroxyl or —OC(═O)R13;
L2 and L3 are each independently H, halogen, hydroxyl, —OC(═O)R13, —OC1-C10 alkyl, —OC2-C10 alkenyl, —OC2-C10 alkynyl, —OR15, —SR5, —NR5R6, —O(C1-C10 acyl), —OC1-C10 alkylene-(—O—C1-C10 alkyl)p, —OC1-C10 alkylene-(—O—C2-C10 alkynyl)p, —OC1-C10 alkylene-(—O—C2-C10 alkenyl)p, —OC2-C10 alkenylene-(—O—C1-C10 alkyl)p, —OC2-C10 alkenylene-(—O—C2-C10 alkenyl)p, —OC2-C10 alkenylene-(—O—C2-C10 alkynyl)p, —OC2-C10 alkynylene-(—O—C1-C10 alkyl)p, —OC2-C10 alkynylene-(—O—C1-C10 alkenyl)p, —OC2-C10 alkynylene-(—O—C2-C10 alkynyl)p, carbocyclyl, aryl, heterocyclyl, or heteroaryl;
R15 is each independently selected from the group consisting of













wherein aa is a naturally occurring amino acid side chain and n is an integer from 1 to 200; and
wherein each L2 and L3 is optionally substituted with one or more of halogen, hydroxyl, C1-C6 alkoxy, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkenyl, C1-C6 alkylene-C1-C6 alkoxy, C2-C6 alkenylene-C1-C6 alkoxy, C2-C6 alkynylene-C1-C6 alkoxy, C1-C6 alkylene-OH, C2-C6 alkenylene-OH, or C2-C6 alkynylene-OH;
a, b and c, are each independently 0, 1, 2, 3, 4, 5, or 6;
m and n are each independently 0,1, 2, 3, or 4; and
p is 1, 2, 3, or 4.
Accordingly, certain embodiments of the present invention are directed to compounds that bind to the AR NTD. In some embodiment, compounds of the present invention can be useful for imaging of tumors with splice variants using SPECT and/or methods of modulating AR NTD activity.
In various embodiments, different stereoisomers of the compound of structure (I) are provided, for example in some embodiments the compound has one of the following structures (Ia), (Ib), (Ic) or (Id):




In some embodiments, X is —O—. In other embodiments, X is —S(O)0.2—. In some embodiments, X is —C(═O)—. In one embodiment, X is —C(OR5)2—. In one embodiment, X is —C(OR5)(OC(═O)R13)—. In some embodiments, X is —C(R3R4)—. In some embodiments, X is —C(═CR3R4)—. In other embodiments, X is —N(R5)—. In one embodiment, X is —N(COR4)—. In one embodiment, X is —CHNR5R6—. In another embodiment, X is —C(═NR5)—. In some embodiments, X is —C(═NOR5)—. In other embodiments, X is —C(═N—NHR7)—.
In some embodiments, X is —C(R3R4)— wherein R3 and R4 are each independently H or C1-C10 alkyl. In other embodiments, X is —C(R3R4)— wherein R3 and R4 are each independently C1-C10 alkyl. In some embodiments, X is —C(R3R4)— wherein R3 and R4 are each independently C1-C6 alkyl. In some embodiments, X is —C(R3R4)— wherein R3 and R4 are each independently C1-C5 alkyl. In one embodiment, X is —C(R3R4)— wherein R3 and R4 are each independently C1 alkyl. In another embodiment, X is —C(R3R4)— wherein R3 and R4 are each independently a methyl. In another embodiment, X is —C(R3R4)— wherein R3 and R4 are each C1 alkyl, wherein R3 and R4 are joined together to form a cyclopropyl ring.
In certain embodiments, R1 is each independently H, halogen, —O(C1-C6)alkyl, —O(C2-C6)alkenyl, —O(C2-C6)alkynyl, -C1-C10 alkyl, -C2-C10 alkenyl, -C2-C10 alkynyl, —OR5—CO2H, —CO2R14, or —CONR5R6. In certain embodiments, R1 is each independently H, halogen, —O(C1-C6)alkyl, —O(C2-C6)alkenyl, —O(C2-C6)alkynyl, -C1-C10 alkyl, -C2-C10 alkenyl, -C2-C10 alkynyl, or —OR5. In another embodiment, R1 is each independently H or halogen.
In certain embodiments, R2 is each independently H, halogen, —O(C1-C6)alkyl, —O(C2-C6)alkenyl, —O(C2-C6)alkynyl, -C1-C10 alkyl, -C2-C10 alkenyl, -C2-C10 alkynyl, —OR5—CO2H, —CO2R14, or —CONR5R6. In certain embodiments, R2 is each independently H, halogen, H, halogen, —O(C1-C6)alkyl, —O(C2-C6)alkenyl, —O(C2-C6)alkynyl, -C1-C10 alkyl, -C2-C10 alkenyl, -C2-C10 alkynyl, or —OR5. In another embodiment, R2 is each independently H or halogen.
In certain embodiments, R3 and R4 are each independently H, halogen, —S(O)0-2R14, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, or aralkyl, C1-C10 acyl, or R3 and R4 may join to form a unsubstituted or substituted mono-, bi-, or tri-cyclic carbocycle or heterocycle containing from 3 to 20 carbon atoms.
In certain embodiments, R5 and R6 are each independently H, C1-C6 alkyl, C2-C6 alkenyl, or C2-C6 alkynyl. In some embodiments, when both R5 and R6 are present, R5 is H and R6 is C1-C6 alkyl, C2-C6 alkenyl, or C2-C6 alkynyl.
In certain embodiments, R7 is each independently H, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, or aryl.
In certain embodiments, R14 is each independently H, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, or aryl.
In certain embodiments, R15 is each independently




In another embodiment, R15 is each independently




In some embodiments, R15 is each independently




In certain of the foregoing embodiments, L1 is hydroxyl or —OC(═O)R13, wherein R13 is -C1-C10 alkyl, -C2-C10 alkenyl or -C2-C10 alkynyl. In some embodiments, L1 is hydroxyl. In another embodiment, L1 is —OC(═O)C1-C6 alkyl. In one embodiment, L1 is —OC(═O)C1-C3 alkyl. In some embodiments, L1 is —OC(═O)CH3.
In certain embodiments, L2 and L3 are each independently H, halogen, hydroxyl, —OC(═O)R13, —OC1-C10 alkyl, —OC2-C10 alkenyl, —OC2-C10 alkynyl, —OR15, —SR5, —NR5R6, —O(C1-C10 acyl), carbocyclyl, aryl, heterocyclyl, or heteroaryl. In some embodiments, L2 and L3 are each independently H, halogen, hydroxyl, —OC(═O)R13, —OC1-C10 alkyl, —OC2-C10 alkenyl, —OC2-C10 alkynyl, —OR15, —SR5, —NR5R6, or —O(C1-C10 acyl).
In certain of the foregoing embodiments, L2 and L3 are each independently H, hydroxyl, —OC1-C10 alkyl, -C2-C10 alkenyl, -C2-C10 alkynyl, or —OC(═O)R13, wherein R13 is -C1-C10 alkyl, -C2-C10 alkenyl or -C2-C10 alkynyl. In some embodiments, at least one of L2 and L3 is a hydroxyl. In another embodiment, at least one of L2 and L3 is a —OC1-C10 alkyl or —OC(═O)C1-C10 alkyl. In a further embodiment, L2 or L3 is a hydroxyl and the remainder is —OC1-C10 alkyl or —OC(═O)C1-C10 alkyl.
In another embodiment, at least one of L2 and L3 is a carbocyclyl, aryl, heterocyclyl, or heteroaryl. In one embodiment, at least one of L2 and L3 is heterocyclyl or heteroaryl. In some embodiment, at least one of L2 and L3 is 3-7 membered heterocylyl, wherein said heteroaryl or said heterocyclyl comprises at least one N atom in the ring.
In another embodiment, at least one of L2 and L3 is selected from a group consisting of pyrrole, furan, thiophene, pyrazole, pyridine, pyridazine, pyrimidine, imidazole, thiazole, isoxazole, oxadiazole, thiadiazole, oxazole, triazole, isothiazole, oxazine, triazine, azepine, pyrrolidine, pyrroline, imidazoline, imidazolidine, pyrazoline, pyrazolidine, piperidine, dioxane, morpholine, dithiane, thiomorpholine, piperazine, and tetrazine.
In one embodiment, n is 0, 1, or 2. In another embodiment, n is 0 or 1.
In one embodiment, m is 0, 1, or 2. In another embodiment, m is 0 or 1.
In some embodiment, a is 0, 1, 2, or 3. In another embodiment, a is 0, 1, or 2. In one embodiment, a is 1.
In some embodiment, b is 0, 1, 2, or 3. In another embodiment, b is 0, 1, or 2. In one embodiment, b is 1.
In some embodiment, c is 0, 1, 2, or 3. In another embodiment, c is 0, 1, or 2. In one embodiment, c is 1.
In one embodiment, the compound of Formula I comprising one or more halogens which can be radioactive isotopes of said halogens.
In some more specific embodiments of the compound of Formula I, the compound has one of the following structures from Table 1, or a pharmaceutically acceptable salt, tautomer, or stereoisomer thereof:







TABLE 1







Representative Compounds









No.
Structure
Name





1




3-(4-(2-(4-(2-chloro-3-  hydroxypropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diol


 


1a




(R)-3-(4-(2-(4-((R)-2-chloro-3-  hydroxypropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diol


 


1b




(S)-3-(4-(2-(4-((S)-2-chloro-3-  hydroxypropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diol


 


1c




(R)-3-(4-(2-(4-((S)-2-chloro-3-  hydroxypropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diol


 


1d




(S)-3-(4-(2-(4-((R)-2-chloro-3-  hydroxypropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diol


 


2




3-(4-(2-(4-(3-acetoxy-2-  chloropropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diyl diacetate


 


2a




(S)-3-(4-(2-(4-(S))-3-acetoxy-2-  chloropropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diyl diacetate


 


2b




(R)-3-(4-(2-(4-((R)-3-acetoxy-2-  chloropropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diyl diacetate


 


2c




(S)-3-(4-(2-(4-((R)-3-acetoxy-2-  chloropropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diyl diacetate


 


2d




(R)-3-(4-(2-(4-((S)-3-acetoxy-2-  chloropropoxy)phenyl)propan-2-  yl)phenoxy)propane-1,2-diyl diacetate









In one embodiment, the present invention is directed to a pharmaceutical composition, comprising a compound having a structure of Formula I:




or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein:
X is —O—, —S(O)0-2—, —C(═O)—, —C(OR5)2—, —C(OR5)(OC(═O)R13)—, —C(R3R4)—, —C(═CR3R4)—, —N(R5)—, —N(COR4)—, —CHNR5R6—, —C(═NR5)—, —C(═NOR5)—, —C(═N—NHR7)—;
R1 and R2 are each independently H, halogen, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, —OH, —OR5, —O(C1-C6)alkyl, —OC(═O)R13, C1-C10 acyl, —S(O)0-2R5, —NO2, —CN, —NH2, —NHR5, —N(R5R6), —CO2H, CO2R14, or CONR5R6;
R3 and R4 are each independently H, halogen, —S(O)0-2R14, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, aralkyl, C1-C10 acyl, or —NR5R6, or R3 and R4 may join to form a unsubstituted or substituted mono-, bi-, or tri-cyclic carbocycle or heterocycle containing from 3 to 20 carbon atoms;
R5 and R6 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, or C2-C10 alkynyl;
R7 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, aminocarbonyl, C1-C10 alkylcarbonyl, C2-C10 alkenylcarbonyl, C2-C10 alkynylcarbonyl, C1-C10 alkylaminocarbonyl, C2-C10 alkenylaminocarbonyl, or C2-C10 alkynylaminocarbonyl;
R13 is each independently C1-C10 alkyl, C2-C10 alkenyl, or C2-C10 alkynyl;
R14 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or aryl;
L1 is hydroxyl or —OC(═O)R13;
L2 and L3 are each independently H, halogen, hydroxyl, —OC(═O)R13, —OC1-C10 alkyl, —OC2-C10 alkenyl, —OC2-C10 alkynyl, —OR15, —SR5, —NR5R6, —O(C1-C10 acyl), —OC1-C10 alkylene-(—O—C1-C10 alkyl)p, —OC1-C10 alkylene-(—O—C2-C10 alkynyl)p, —OC1-C10 alkylene-(—O—C2-C10 alkenyl)p, —OC2-C10 alkenylene-(—O—C1-C10 alkyl)p, —OC2-C10 alkenylene-(—O—C2-C10 alkenyl)p, —OC2-C10 alkenylene-(—O—C2-C10 alkynyl)p, —OC2-C10 alkynylene-(—O—C1-C10 alkyl)p, —OC2-C10 alkynylene-(—O—C1-C10 alkenyl)p, —OC2-C10 alkynylene-(—O—C2-C10 alkynyl)p, carbocyclyl, aryl, heterocyclyl, or heteroaryl;
R15 is each independently selected from the group consisting of













wherein aa is a naturally occurring amino acid side chain and n is an integer from 1 to 200, and wherein each L2 and L3 is optionally substituted with one or more of halogen, hydroxyl, C1-C6 alkoxy, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkenyl, C1-C6 alkylene-C1-C6 alkoxy, C2-C6 alkenylene-C1-C6 alkoxy, C2-C6 alkynylene-C1-C6 alkoxy, C1-C6 alkylene-OH, C2-C6 alkenylene-OH, or C2-C6 alkynylene-OH;

a, b and c, are each independently 0, 1, 2, 3, 4, 5, or 6;
m and n are each independently 0,1, 2, 3, or 4; and
p is 1, 2, 3, or 4.
In some embodiment, the pharmaceutical composition comprising a compound having a structure of Formula I can further comprise a pharmaceutically acceptable carrier. In another embodiment, the pharmaceutical composition comprising a compound having a structure of Formula I can further comprise an additional therapeutic agent. In one embodiment, the pharmaceutical composition comprising a compound having a structure of Formula I can further comprise a pharmaceutically acceptable carrier and an additional therapeutic agent.
In another embodiment, the pharmaceutical composition comprising a compound having a structure of Formula I can further comprise an additional therapeutic agent which is for treating prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, age-related macular degeneration, or combinations thereof.
Accordingly, one embodiment comprises the use of the disclosed compounds in combination therapy with one or more currently-used or experimental pharmacological therapies which are utilized for treating the above disease states irrespective of the biological mechanism of action of such pharmacological therapies, including without limitation pharmacological therapies which directly or indirectly inhibit the androgen receptor, pharmacological therapies which are cyto-toxic in nature, and pharmacological therapies which interfere with the biological production or function of androgen (hereinafter, an “additional therapeutic agent”). By “combination therapy” is meant the administration of any one or more of a compound of Formula I with one or more of another therapeutic agent to the same patient such that their pharmacological effects are contemporaneous with one another, or if not contemporaneous, that their effects are synergistic with one another even though dosed sequentially rather than contemporaneously.
Such administration can include without limitation dosing of one or more of a compound of Formula I and one or more of the additional therapeutic agent(s) as separate agents without any comingling prior to dosing, as well as formulations which include one or more other androgen-blocking therapeutic agents mixed with one or more compound of Formula I as a pre-mixed formulation. Administration of the compound(s) of Formula I in combination with the additional therapeutic agents for treatment of the above disease states can also include dosing by any dosing method including without limitation, intravenous delivery, oral delivery, intra-peritoneal delivery, intra-muscular delivery, or intra-tumoral delivery.
In another aspect of the present disclosure, the one or more of the additional therapeutic agents can be administered to the patient before administration of the compound(s) of Formula I. In another embodiment, the compound(s) of Formula I can be co-administered with one or more of the additional therapeutic agents. In yet another aspect, the one or more additional therapeutic agents can be administered to the patient after administration of the compound(s) of Formula I.
It is fully within the scope of the disclosure that the ratio of the doses of compound(s) of Formula I to that of the one or more additional therapeutic agents may or may not equal to one and can be varied accordingly to achieve the optimal therapeutic benefit.
For greater clarity the compound(s) of Formula I that are combined with the one or more additional therapeutic agents for improved treatment of the above disease states can comprise, but are not limited to any compound having a structure of Formula I, including those compounds shown in Table 1.
The additional therapeutic agents include without limitation any pharmacological agent which is currently approved by the FDA in the U.S. (or elsewhere by any other regulatory body) for use as pharmacological treatment of any of the above disease states, or which is currently being used experimentally as part of a clinical trial program that relates to the above disease states. Non-limiting examples of the other pharmacological agents can comprise, without limitation: the chemical entity known as ODM-201 (also known as BAY1841788) and related compounds;, which appears to bind to the AR and blocks its cellular function, and is currently in clinical development as a treatment for prostate cancer); the chemical entity known as enzalutamide (4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)-2-fluoro-N-methylbenzamide) and related compounds, which appears to be a blocker of the androgen receptor (AR) LBD and a FDA-approved treatment for prostate cancer; the chemical entity known as Galeterone and related compounds which appears to be a blocker of the androgen receptor (AR) LBD, and a CYP17 lyase inhibitor, and also appears to decrease overall androgen receptor levels in prostate cancer cells. Galeterone is currently in development as a treatment for prostate cancer; the chemical entity known as ARN-509 (4-[7-[6-cyano-5-(trifluoromethyl)pyridin-3-yl]-8-oxo-6-sulfanylidene-5,7-diazaspiro[3.4]octan-5-yl]-2-fluoro-N-methylbenzamide) and related compounds which appears to be a blocker of the androgen receptor (AR) LBD and is currently in development as a treatment for prostate cancer; the chemical entity known as abiraterone (or CB-7630; (3S,8R,9S,10R,13S,14S)-10,13-dimethyl-17-(pyridin-3 -yl) 2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol), and related molecules, which appears to block the production of androgen and FDA-approved treatment for prostate cancer; the chemical entity known as bicalutamide (N-[4-cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulfonyl]-2-hydroxy-2-methylpropanamide) and related compounds, which appears to be a blocker of the androgen receptor (AR) LBD and which is currently used to treat prostate cancer, the chemical entity known as nilutamide (5,5-dimethyl-3-[4-nitro-3-(trifluoromethyl)phenyl] imidazolidine-2,4-dione) and related compounds, which appears to be a blocker of the AR LBD and which is currently used to treat prostate cancer, the chemical entity known as flutamide (2-methyl-N-[4-nitro-3-(trifluoromethyl)phenyl]-propanamide) and related compounds, which appears to be a blocker of the androgen receptor (AR) LBD and which is currently used to treat prostate cancer, the chemical entities known as cyproterone acetate (6-chloro-1β,2β-dihydro-17-hydroxy-3′H-cyclopropa[1,2]pregna-4,6-diene-3,20-dione) and related compounds, which appears to be a blocker of the androgen receptor (AR) LBD and which is currently used to treat prostate cancer, the chemical entity known as docetaxel (Taxotere; 1,7β,10β-trihydroxy-9-oxo-5β,20-epoxytax-11-ene-2α,4,13α-triyl 4-acetate 2-benzoate 13-{(2R,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-3-phenylpropanoate}) and related compounds, which appears to be a cytotoxic antimicrotubule agent and is currently used in combination with prednisone to treat prostate cancer, the chemical entity known as Bevacizumab (Avastin), a monoclonal antibody that recognizes and blocks vascular endothelial growth factor A (VEGF-A) and may be used to treat prostate cancer, the chemical entity known as OSU-HDAC42 ((S)-(+)-N-hydroxy-4-(3-methyl-2-phenylbutyrylamino)-benzamide), and related compounds, which appears to act as a histone deacetylase inhibitor, and is currently being developed as a treatment for prostate cancer, the chemical entity known as VITAXIN which appears to be a monoclonal antibody against the vascular integrin αvβ3 to prevent angiogenesis, and which may be used to treat prostate cancer, the chemical entity known as sunitumib (N-(2-diethylaminoethyl)-5-[(Z)-(5-fluoro-2-oxo-1H-indol-3-ylidene)methyl]-2,4-dimethyl-1H-pyrrole-3-carboxamide) and related compounds, which appears to inhibit multiple receptor tyrosine kinases (RTKs) and may be used for treatment of prostate cancer, the chemical entity known as ZD-4054 (N-(3-Methoxy-5-methylpyrazin-2-yl)-2-[4-(1,3,4-oxadiazol-2-yl)phenyl]pyridin-3-sulfonamid) and related compounds, which appears to block the edta receptor and which may be used for treatment of prostate cancer; the chemical entity known as Cabazitaxel (XRP-6258), and related compounds, which appears to be a cytotoxic microtubule inhibitor, and which is currently used to treat prostate cancer; the chemical entity known as MDX-010 (Ipilimumab), a fully human monoclonal antibody that binds to and blocks the activity of CTLA-4 which is currently in development as an immunotherapeutic agent for treatment of prostate cancer; the chemical entity known as OGX 427 which appears to target HSP27 as an antisense agent, and which is currently in development for treatment of prostate cancer; the chemical entity known as OGX 011 which appears to target clusterin as an antisense agent, and which is currently in development as a treatment for prostate cancer; the chemical entity known as finasteride (Proscar, Propecia; N-(1,1-dimethylethyl)-3-oxo-(5α,17β)-4-azaandrost-1-ene-17-carboxamide), and related compounds, which appears to be a 5-alpha reductase inhibitor that reduces levels of dihydrotestosterone, and may be used to treat prostate cancer; the chemical entity known as dutasteride (Avodart; 5α, 17β)-N-{2,5bis(trifluoromethyl) phenyl}-3-oxo-4-azaandrost-1-ene-17-carboxamide) and related molecules, which appears to be a 5-alpha reductase inhibitor that reduces levels of dihydrotestosterone, and may be used in the treatment of prostate cancer; the chemical entity known as turosteride ((4aR,4bS,6aS,7S,9aS,9bS,11aR)-1,4a,6a-trimethyl-2-oxo-N-(propan-2-yl)-N-(propan-2 ylcarbamoyl)hexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxamide), and related molecules, which appears to be a 5-alpha reductase inhibitor that reduces levels of dihydrotestosterone and may be used in the treatment of prostate cancer; the chemical entity known as bexlosteride (LY-191,704; (4aS,10bR)-8-chloro-4-methyl-1,2,4a,5,6,10b-hexahydrobenzo[f]quinolin-3 -one), and related compounds, which appears to be a 5-alpha reductase inhibitor that reduces levels of dihydrotestosterone and may be used in the treatment of prostate cancer; the chemical entity known as izonsteride (LY-320,236; (4aR,10bR)-8-[(4-ethyl-1,3-benzothiazol-2-yl)sulfanyl]-4,10b-dimethyl-1,4,4a,5,6,10b-hexahydrobenzo[f]quinolin-3 (2H)-one) and related compounds, which appears to be a 5-alpha reductase inhibitor that reduces levels of dihydrotestosterone and may be used for the treatment of prostate cancer; the chemical entity known as FCE 28260 and related compounds, which appears to be a 5-alpha reductase inhibitor that reduces levels of dihydrotestosterone and may be used for the treatment of prostate cancer; the chemical entity known as SKF105,111, and related compounds, which appears to be a 5-alpha reductase inhibitor that reduces levels of dihydrotestosterone and may be used for treatment of prostate cancer.
Accordingly, in some embodiments, the pharmaceutical composition comprising a compound having a structure of Formula I can further comprise an additional therapeutic agent selected form the group consisting of enzalutamide, Galeterone, ARN-509; abiraterone, bicalutamide, nilutamide, flutamide, cyproterone acetate, docetaxel, Bevacizumab (Avastin), OSU-HDAC42, VITAXIN, sunitumib, ZD-4054, Cabazitaxel (XRP-6258), MDX-010 (Ipilimumab), OGX 427, OGX 011, finasteride, dutasteride, turosteride, bexlosteride, izonsteride, FCE 28260, SKF105,111, ODM-201, radium 233, or related compounds thereof.
In some embodiments, compounds of Formula I which result in unstable structures and/or unsatisfied valences are not included within the scope of the invention.
In another embodiment, the present disclosure provides a pharmaceutical composition comprising any of the foregoing compounds of Formula I and a pharmaceutically acceptable carrier.
Compounds as described herein may be in the free form or in the form of a salt thereof. In some embodiments, compounds as described herein may be in the form of a pharmaceutically acceptable salt, which are known in the art (Berge et al., J. Pharm. Sci. 1977, 66, 1). Pharmaceutically acceptable salt as used herein includes, for example, salts that have the desired pharmacological activity of the parent compound (salts which retain the biological effectiveness and/or properties of the parent compound and which are not biologically and/or otherwise undesirable). Compounds as described herein having one or more functional groups capable of forming a salt may be, for example, formed as a pharmaceutically acceptable salt. Compounds containing one or more basic functional groups may be capable of forming a pharmaceutically acceptable salt with, for example, a pharmaceutically acceptable organic or inorganic acid. Pharmaceutically acceptable salts may be derived from, for example, and without limitation, acetic acid, adipic acid, alginic acid, aspartic acid, ascorbic acid, benzoic acid, benzenesulfonic acid, butyric acid, cinnamic acid, citric acid, camphoric acid, camphorsulfonic acid, cyclopentanepropionic acid, diethylacetic acid, digluconic acid, dodecylsulfonic acid, ethanesulfonic acid, formic acid, fumaric acid, glucoheptanoic acid, gluconic acid, glycerophosphoric acid, glycolic acid, hemisulfonic acid, heptanoic acid, hexanoic acid, hydrochloric acid, hydrobromic acid, hydriodic acid, 2-hydroxyethanesulfonic acid, isonicotinic acid, lactic acid, malic acid, maleic acid, malonic acid, mandelic acid, methanesulfonic acid, 2-napthalenesulfonic acid, naphthalenedisulphonic acid, p-toluenesulfonic acid, nicotinic acid, nitric acid, oxalic acid, pamoic acid, pectinic acid, 3-phenylpropionic acid, phosphoric acid, picric acid, pimelic acid, pivalic acid, propionic acid, pyruvic acid, salicylic acid, succinic acid, sulfuric acid, sulfamic acid, tartaric acid, thiocyanic acid or undecanoic acid. Compounds containing one or more acidic functional groups may be capable of forming pharmaceutically acceptable salts with a pharmaceutically acceptable base, for example, and without limitation, inorganic bases based on alkaline metals or alkaline earth metals or organic bases such as primary amine compounds, secondary amine compounds, tertiary amine compounds, quaternary amine compounds, substituted amines, naturally occurring substituted amines, cyclic amines or basic ion-exchange resins. Pharmaceutically acceptable salts may be derived from, for example, and without limitation, a hydroxide, carbonate, or bicarbonate of a pharmaceutically acceptable metal cation such as ammonium, sodium, potassium, lithium, calcium, magnesium, iron, zinc, copper, manganese or aluminum, ammonia, benzathine, meglumine, methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, isopropylamine, tripropylamine, tributylamine, ethanolamine, diethanolamine, 2-dimethylaminoethanol, 2-diethylaminoethanol, dicyclohexylamine, lysine, arginine, histidine, caffeine, hydrabamine, choline, betaine, ethylenediamine, glucosamine, glucamine, methylglucamine, theobromine, purines, piperazine, piperidine, procaine, N-ethylpiperidine, theobromine, tetramethylammonium compounds, tetraethylammonium compounds, pyridine, N,N-dimethylaniline, N-methylpiperidine, morpholine, N-methylmorpholine, N-ethylmorpholine, dicyclohexylamine, dibenzylamine, N,N-dibenzylphenethylamine, 1-ephenamine, N,N′-dibenzylethylenediamine or polyamine resins. In some embodiments, compounds as described herein may contain both acidic and basic groups and may be in the form of inner salts or zwitterions, for example, and without limitation, betaines. Salts as described herein may be prepared by conventional processes known to a person skilled in the art, for example, and without limitation, by reacting the free form with an organic acid or inorganic acid or base, or by anion exchange or cation exchange from other salts. Those skilled in the art will appreciate that preparation of salts may occur in situ during isolation and purification of the compounds or preparation of salts may occur by separately reacting an isolated and purified compound.
In some embodiments, compounds and all different forms thereof (e.g. free forms, salts, polymorphs, isomeric forms) as described herein may be in the solvent addition form, for example, solvates. Solvates contain either stoichiometric or non-stoichiometric amounts of a solvent in physical association the compound or salt thereof. The solvent may be, for example, and without limitation, a pharmaceutically acceptable solvent. For example, hydrates are formed when the solvent is water or alcoholates are formed when the solvent is an alcohol.
In some embodiments, compounds and all different forms thereof (e.g. free forms, salts, solvates, isomeric forms) as described herein may include crystalline and amorphous forms, for example, polymorphs, pseudopolymorphs, conformational polymorphs, amorphous forms, or a combination thereof. Polymorphs include different crystal packing arrangements of the same elemental composition of a compound. Polymorphs usually have different X-ray diffraction patterns, infrared spectra, melting points, density, hardness, crystal shape, optical and electrical properties, stability and/or solubility. Those skilled in the art will appreciate that various factors including recrystallization solvent, rate of crystallization and storage temperature may cause a single crystal form to dominate.
In some embodiments, compounds and all different forms thereof (e.g. free forms, salts, solvates, polymorphs) as described herein include isomers such as geometrical isomers, optical isomers based on asymmetric carbon, stereoisomers, tautomers, individual enantiomers, individual diastereomers, racemates, diastereomeric mixtures and combinations thereof, and are not limited by the description of the formula illustrated for the sake of convenience.
III. Methods
The present compounds find use in any number of methods. For example, in some embodiments the compounds can be useful in methods for modulating androgen receptor (AR). Accordingly, in one embodiment, the present disclosure provides the use of any one of the foregoing compounds of Formula I for modulating androgen receptor (AR) activity. For example in some embodiments, modulating androgen receptor (AR) activity can be in a mammalian cell. Modulating androgen receptor (AR) may be in a subject in need thereof (e.g., a mammalian subject) and for treatment of any of the described conditions or diseases.
In other embodiments, modulating androgen receptor (AR) activity can be for treatment of at least one indication selected from the group consisting of: prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, age related macular degeneration, and combinations thereof. For example in some embodiments, the indication is prostate cancer. In other embodiments, the prostate cancer is castration resistant prostate cancer (also referred to as hormone refractory, androgen-independent, androgen deprivation resistant, androgen ablation resistant, androgen depletion-independent, castration-recurrent, anti-androgen-recurrent). While in other embodiments, the prostate cancer is androgen dependent prostate cancer. In other embodiments, the spinal and bulbar muscular atrophy is Kennedy's disease.
In some embodiments, compounds as described herein may be administered to a subject. In one embodiment, the present invention can be directed to a method of treating castration resistant prostate cancer comprising administering a pharmaceutical composition comprising a compound having a structure of Formula I. In some embodiments, the present invention can be directed to a method of treating androgen-dependent prostate cancer comprising administering a pharmaceutical composition comprising a compound having a structure of Formula I. In other embodiments, the present invention can be directed to a method of treating androgen-independent prostate cancer comprising administering a pharmaceutical composition comprising a compound having a structure of Formula I.
In other embodiments, the present disclosure provides a method of modulating androgen receptor (AR) activity, the method comprising administering any one of the foregoing compounds of Formula I, pharmaceutically acceptable salt thereof, or pharmaceutical composition of Formula I as described herein (including compositions comprising a compound of Formula I and an additional therapeutic agent), to a subject (e.g., mammal) in need thereof. In some embodiments, modulating androgen receptor (AR) activity can be in a mammalian cell. In other embodiments, modulating androgen receptor (AR) activity can be in a mammal. In one embodiment, modulating androgen receptor (AR) activity can be in a human.
The modulating androgen receptor (AR) activity may be for inhibiting AR N-terminal domain activity. The modulating androgen receptor (AR) activity may be for inhibiting androgen receptor (AR) activity. The modulating may be in vivo. The modulating androgen receptor (AR) activity may be for treatment of at least one indication selected from the group consisting of: prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy (e.g., Kennedy's disease), and age related macular degeneration. The indication may be prostate cancer. The prostate cancer may be castration-resistant prostate cancer. The prostate cancer may be androgen dependent prostate cancer.
In accordance with another embodiment, there is provided a use of the compounds of Formula I, pharmaceutically acceptable salt thereof, or pharmaceutical composition of Formula I as described herein for preparation of a medicament for modulating androgen receptor (AR).
Alternatively, in one embodiment, the method of modulating androgen receptor activity, comprising administering Formula I, pharmaceutically acceptable salt thereof, or pharmaceutical composition of Formula I as described herein, are provided. In some embodiments, the administration may be to a mammal. In other embodiments, the administering may be to a mammal in need thereof and in an effective amount for the treatment of at least one indication selected from the group consisting of: prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy (e.g., Kennedy's disease), age related macular degeneration, and combinations thereof.
Androgen ablation therapy causes a temporary reduction in prostate cancer tumor burden, but the malignancy will begin to grow again in the absence of testicular androgens to form castrate resistant prostate cancer (CRPC). A rising titer of serum prostate-specific antigen (PSA) after androgen ablation therapy indicates biochemical failure, the emergence of CRPC, and re-initiation of an androgen receptor (AR) transcription program. Most patients succumb to CRPC within two years of biochemical failure.
AR is a transcription factor and a validated target for prostate cancer therapy. Current therapies include androgen ablation and administration of antiandrogens. Most CRPC is suspected to be AR-dependent. AR has distinct functional domains that include the C-terminus ligand-binding domain (LBD), a DNA-binding domain (DBD), and an amino-terminal domain (NTD). AR NTD contains the activation function-1 (AF-1) that contributes most of the activity to the AR. Recently, splice variants of the AR that lack the LBD have been reported in prostate cancer cell lines (VCaP and 22Rv1), and in CRPC tissues. To date more than 20 splice variants of AR have been detected. Splice variants V7 and V567es are clinically relevant with levels of expression correlated to poor survival and CRPC. AR V567es is solely expressed in 20% of metastases. Abiraterone resistance is associated with expression of AR splice variants. Enzalutamide also increases levels of expression of these constitutively active AR splice variants. These splice variants lack LBD and thereby would not be inhibited by current therapies that target the AR LBD such as antiandrogens or androgen ablation therapy. A single patient with advanced prostate cancer can have many lesions throughout the body and skeleton and each tumor can have differing levels of expression of AR.
In some embodiments, the compounds as described herein or pharmaceutically acceptable salts thereof can find use in the diagnostic of at least one indication selected from the group consisting of: prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, benign prostatic hyperplasia, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, and age-related macular degeneration. In some embodiments, the compounds as described herein or acceptable salts thereof above can be used in the preparation of a medicament or a composition for imaging the prostate, for example for imaging benign prostate conditions or for imaging prostate cancer in a subject in need of such imaging (for example for diagnosis and/or location of prostate tumors).
In some embodiments, pharmaceutical compositions useful in modulating androgen receptor (AR) activity, in accordance with this invention may comprise a salt of such a compound, preferably a pharmaceutically or physiologically acceptable salt. Pharmaceutical preparations can typically comprise one or more carriers, excipients or diluents acceptable for the mode of administration of the preparation, be it by injection, inhalation, topical administration, lavage, or other modes suitable for the selected treatment. Suitable carriers, excipients or diluents are those known in the art for use in such modes of administration.
Suitable pharmaceutical compositions may be formulated by means known in the art and their mode of administration and dose determined by the skilled practitioner. For parenteral administration, a compound may be dissolved in sterile water or saline or a pharmaceutically acceptable vehicle used for administration of non-water soluble compounds such as those used for vitamin K. For enteral administration, the compound may be administered in a tablet, capsule or dissolved in liquid form. The tablet or capsule may be enteric coated, or in a formulation for sustained release. Many suitable formulations are known, including, polymeric or protein microparticles encapsulating a compound to be released, ointments, pastes, gels, hydrogels, or solutions which can be used topically or locally to administer a compound. A sustained release patch or implant may be employed to provide release over a prolonged period of time. Many techniques known to one of skill in the art are described in Remington: the Science & Practice of Pharmacy by Alfonso Gennaro, 20th ed., Lippencott Williams & Wilkins, (2000). Formulations for parenteral administration may, for example, contain excipients, polyalkylene glycols such as polyethylene glycol, oils of vegetable origin, or hydrogenated naphthalenes. Biocompatible, biodegradable lactide polymer, lactide/glycolide copolymer, or polyoxyethylene-polyoxypropylene copolymers may be used to control the release of the compounds. Other potentially useful parenteral delivery systems for modulatory compounds include ethylene-vinyl acetate copolymer particles, osmotic pumps, implantable infusion systems, and liposomes. Formulations for inhalation may contain excipients, for example, lactose, or may be aqueous solutions containing, for example, polyoxyethylene-9-lauryl ether, glycocholate and deoxycholate, or may be oily solutions for administration in the form of nasal drops, or as a gel.
In another aspect, the present disclosure provides a pharmaceutical composition comprising a compound as described herein, and an additional therapeutic agent and/or a pharmaceutically acceptable carrier. In some embodiments, the additional therapeutic agent can be for treating prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy or age related macular degeneration. In other embodiments, the additional therapeutic agent can be enzalutamide, galeterone, ARN-509, ODN-201 abiraterone, bicalutamide, nilutamide, flutamide, cyproterone acetate, docetaxel, Bevacizumab (Avastin), OSU-HDAC42, VITAXIN, sunitumib, ZD-4054, Cabazitaxel (XRP-6258), MDX-010 (Ipilimumab), OGX 427, OGX 011, finasteride, dutasteride, turosteride, bexlosteride, izonsteride, FCE 28260, SKF105,111 ODM-201, or related compounds thereof.
Compounds described herein may also be used in assays and for research purposes. Definitions used include ligand dependent activation of the androgen receptor (AR) by androgens such as dihydrotestosterone (DHT) or the synthetic androgen (R1881) used for research purposes. Ligand-independent activation of the androgen receptor (AR) refers to transactivation of the full length androgen receptor (AR) in the absence of androgen (ligand) by, for example, stimulation of the cAMP dependent protein kinase (PKA) pathway with forskolin (FSK). Some compounds and compositions of this invention may inhibit both FSK and androgen (e.g. R1881, a synthetic androgen) induction of ARE luciferase (ARE-luc). Constituative activity of the androgen receptor (AR) refers to splice variants lacking the androgen receptor (AR) ligand-binding domain. Such compounds may block a mechanism that is common to both ligand dependent and ligand independent activation of the androgen receptor (AR), as well as constitutively active splice variants of the androgen receptor (AR) that lack ligand-binding domain. This could involve any step in activation of the androgen receptor (AR) including dissociation of heatshock proteins, essential posttranslational modifications (e.g., acetylation, phosphorylation), nuclear translocation, protein-protein interactions, formation of the transcriptional complex, release of co repressors, and/or increased degradation. Some compounds and compositions of this invention may inhibit ligand-only activity and may interfere with a mechanism specific to ligand dependent activation (e.g., accessibility of the ligand binding domain (LBD) to androgen). Numerous disorders in addition to prostate cancer involve the androgen axis (e.g., acne, hirsutism, alopecia, benign prostatic hyperplasia) and compounds interfering with this mechanism may be used to treat such conditions. Some compounds and compositions of this invention may only inhibit FSK induction and may be specific inhibitors to ligand independent activation of the androgen receptor (AR). These compounds and compositions may interfere with the cascade of events that normally occur with FSK and/or PKA activity or any downstream effects that may play a role on the androgen receptor (AR) (e.g. FSK increases MAPK activity which has a potent effect on androgen receptor (AR) activity). Examples may include an inhibitor of cAMP and or PKA or other kinases. Some compounds and compositions of this invention may induce basal levels of activity of the AR (no androgen or stimulation of the PKA pathway). Some compounds and compositions of this invention may increase induction by R1881 or FSK. Such compounds and compositions may stimulate transcription or transactivation of the AR. Some compounds and compositions of this invention may inhibit activity of the androgen receptor. Interleukin 6 (IL 6) also causes ligand independent activation of the androgen receptor (AR) in LNCaP cells and can be used in addition to FSK.
Compounds or pharmaceutical compositions in accordance with this invention or for use in this invention may be administered by means of a medical device or appliance such as an implant, graft, prosthesis, stent, etc. Also, implants may be devised which are intended to contain and release such compounds or compositions. An example would be an implant made of a polymeric material adapted to release the compound over a period of time.
It is to be noted that dosage values may vary with the exact imaging protocol. For any particular subject, specific dosage regimens may be adjusted over time according to the individual need and the professional judgment of the person administering or supervising the administration of the compositions. Dosage ranges set forth herein are exemplary only and do not limit the dosage ranges that may be selected by medical practitioners. The amount of active compound(s) in the composition may vary according to factors such as the disease state, age, sex, and weight of the subject. Dosage regimens can be adjusted to provide the optimum imaging result. For example, a single bolus can be administered, several divided doses can be administered over time or the dose can be proportionally reduced or increased as indicated by the imaging results. It can be advantageous to formulate parenteral compositions in dosage unit form for ease of administration and uniformity of dosage.
In general, compounds of the invention should be used without causing substantial toxicity. Toxicity of the compounds of the invention can be determined using standard techniques, for example, by testing in cell cultures or experimental animals and determining the therapeutic index, i.e., the ratio between the LD50 (the dose lethal to 50% of the population) and the LD100 (the dose lethal to 100% of the population). In some circumstances, such as in severe disease conditions, substantial excesses of the compositions may be administered for therapeutic effects. Some compounds of this invention may be toxic at some concentrations. Titration studies may be used to determine toxic and non-toxic concentrations. Toxicity may be evaluated by examining a particular compound's or composition's specificity across cell lines using PC3 or DU145 cells as possible negative controls since these cells do not express functional AR. Animal studies may be used to provide an indication if the compound has any effects on other tissues. Systemic therapy that targets the AR will not likely cause major problems to other tissues since antiandrogens and androgen insensitivity syndrome are not fatal.
Compounds for use in the present invention may be obtained from medical sources or modified using known methodologies from naturally occurring compounds. In addition, methods of preparing or synthesizing compounds of the present invention will be understood by a person of skill in the art having reference to known chemical synthesis principles. For example, Auzou et al 1974 European Journal of Medicinal Chemistry 9(5), 548-554 describes suitable synthetic procedures that may be considered and suitably adapted for preparing compounds of any one of the compounds of structure (I) as set out above. Other references that may be helpful include: Debasish Das, Jyh-Fu Lee and Soofin Cheng “Sulfonic acid functionalized mesoporous MCM-41 silica as a convenient catalyst for Bisphenol-A synthesis” Chemical Communications, (2001) 2178-2179; U.S. Pat. No. 2,571,217 Davis, Orris L.; Knight, Horace S.; Skinner, John R. (Shell Development Co.) “Halohydrin ethers of phenols.” (1951); and Rokicki, G.; Pawlicki, J.; Kuran, W. “Reactions of 4-chloromethyl-1,3-dioxolan-2-one with phenols as a new route to polyols and cyclic carbonates.” Journal fuer Praktische Chemie (Leipzig) (1985) 327, 718-722.
In some embodiments, compounds and all different forms thereof as described herein may be used, for example, and without limitation, in combination with other treatment methods for at least one indication selected from the group consisting of: prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, and age related macular degeneration. For example, compounds and all their different forms as described herein may be used as neoadjuvant (prior), adjunctive (during), and/or adjuvant (after) therapy with surgery, radiation (brachytherapy or external beam), or other therapies (eg. HIFU), and in combination with chemotherapies, androgen ablation, antiandrogens or any other therapeutic approach.
In an exemplary embodiment for imaging the prostate, a dose of the disclosed compounds in solution (typically 5 to 10 millicuries or 200 to 400 MBq) can be typically injected rapidly into a saline drip running into a vein, in a patient. Then, the patient is placed in the SPECT for a series of one or more scans which may take from 20 minutes to as long as an hour (often, only about one quarter of the body length may be imaged at a time). Methods for SPECT scanning are well known in the art.
The compounds described herein may be used for in vivo or in vitro research uses (i.e. non-clinical) to investigate the mechanisms of orphan and nuclear receptors (including steroid receptors such as androgen receptor (AR)). Furthermore, these compounds may be used individually or as part of a kit for in vivo or in vitro research to investigate signal transduction pathways and/or the activation of orphan and nuclear receptors using recombinant proteins, cells maintained in culture, and/or animal models.
EXAMPLES
All non-aqueous reactions were performed in flame-dried round bottomed flasks. The flasks were fitted with rubber septa and reactions were conducted under a positive pressure of argon unless otherwise specified. Stainless steel syringes were used to transfer air- and moisture-sensitive liquids. Flash column chromatography was performed as described by Still et al. (Still, W. C.; Kahn, M.; Mitra, A. J. Org. Chem. 1978, 43, 2923) using 230-400 mesh silica gel. Thin-layer chromatography was performed using aluminum plates pre-coated with 0.25 mm 230-400 mesh silica gel impregnated with a fluorescent indicator (254 nm). Thin-layer chromatography plates were visualized by exposure to ultraviolet light and a “Seebach” staining solution (700 mL water, 10.5 g Cerium (IV) sulphate tetrahydrate, 15.0 g molybdato phosphoric acid, 17.5 g sulphuric acid) followed by heating ( ̃1 min) with a heating gun ( ̃250° C.). Organic solutions were concentrated on Büchi R-114 rotatory evaporators at reduced pressure (15-30 torr, house vacuum) at 25-40° C.
Commercial regents and solvents were used as received. All solvents used for extraction and chromatography were HPLC grade. Normal-phase Si gel Sep paksTM were purchased from waters, Inc. Thin-layer chromatography plates were Kieselgel 60F254. All synthetic reagents were purchased from Sigma Aldrich and Fisher Scientific Canada.
Example 1
Synthesis of (R)-3-(4-(2-(4-((R)-2-chloro-3 -hydroxypropoxy)phenyl)propan-2-yl)phenoxy)propane-1,2-diol (1a)




Compound i
To a stirred solution of (S)-4-(2-(4-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)propan-2-yl)phenol (1 equiv) in ethanol at rt was added NEt3 (1 equiv) and (S)-oxiran-2-ylmethanol (3 equiv), then the reaction mixture was refluxed. After the completion of the reaction, the product was extracted with ethyl acetate (×3). The organic layer was washed with deionized water, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The resulting residue was purified by flash column chromatography on silica gel to provide (R)-3-(4-(2-(4-(((S)-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)propan-2-yl)phenoxy)propane-1,2-diol. See FIGS. 4A-4B for NMR spectra.
Compound ii
To a mixture of (R)-3-(4-(2-(4-(((S)-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)propan-2-yl)phenoxy)propane-1,2-diol (1 equiv) and trityl chloride, pyridine and DMAP were added. The reaction mixture was heated to 50° C. After the completion of the reaction, the product was extracted with ethyl acetate (×3). The organic layer was washed with deionized water, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The resulting residue was purified by flash column chromatography on silica gel to provide (S)-1-(4-(2-(4-(((S)-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)propan-2-yl)phenoxy)-3-(triphenyl-14-oxidanyl)propan-2-ol. See FIGS. 3A-3B for NMR spectra.
Compound iii
To a solution of (S)-1-(4-(2-(4-(((S)-2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)propan-2-yl)phenoxy)-3-(triphenyl-14-oxidanyl)propan-2-ol (1 equiv) in carbon tetrachloride, PPh3 was added and the reaction mixture was refluxed. After the completion of the reaction, the product was extracted with ethyl acetate (×3). The organic layer was washed with deionized water, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The resulting residue was purified by flash column chromatography on silica gel to provide (S)-4-((4-(2-(4-((S)-2-chloro-3-(triphenyl-14-oxidanyl)propoxy)phenyl)propan-2-yl)phenoxy)methyl)-2,2-dimethyl-1,3-dioxolane. See FIG. 2 for NMR spectrum.
Compound 1a
To a solution of (S)-4-((4-(2-(4-((S)-2-chloro-3-(triphenyl-14-oxidanyl)propoxy)phenyl)propan-2-yl)phenoxy)methyl)-2,2-dimethyl-1,3-dioxolane (1 equiv) in methanol, HCl was added and the reaction was stirred at rt. After the completion of the reaction, the product was extracted with ethyl acetate (×3). The organic layer was washed with deionized water, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The resulting residue was purified by flash column chromatography on silica gel to provide Compound 1a. See FIG. 1A-1B for NMR spectra of Compound 1a.
Example 2
Synthesis of (R)-3 -(4-(2-(4-((S)-2-chloro-3 -hydroxypropdxy)phenyl)propan-2-yl)phenoxy)propane-1,2-diol (1c)
Compound (1c)
Compound 1c was synthesized according to Example 1 but starting with (R)-oxiran-2-ylmethanol instead of (S)-oxiran-2ylmethanol. See FIG. 5A-5B for NMR spectra of Compound1c.
Example 3
Compound Activity
LNCaP cells were transiently transfected with PSA (6.1 kb)-luciferase for 24 h prior to pre-treatment with compounds of the invention (e.g., Compound 1c) ranging in concentration from 62.5 ng/ml to 1.5 ug/ml for 1 hour before the addition of vehicle, or synthetic androgen, R1881 (1 nM) to induce luciferase production. After 24 h of incubation with R1881, the cells were harvested, and relative luciferase activities were determined. To determine the IC50, treatments were normalized to the predicted maximal activity induction (in the absence of test compounds, vehicle only).







TABLE 2







IC50 values for selected compounds (μM)












Compound
Trial 1
Trial 2
Trial 3
Trial 4
Average IC50





1c
14.01
19.38
17.00
15.83
16.69 ± 2.68









One skilled in the art will recognize that variations to the order of the steps and reagents discussed in the Examples are possible.
In addition, protecting group strategies may be employed for preparation of the compounds disclosed herein. Such strategies are well known to those of skill in the art. Exemplary protecting groups and related strategies are disclosed in Greene's Protective Groups in Organic Synthesis, Wiley-Interscience; 4 edition (Oct. 30, 2006), which is hereby incorporated by reference in its entirety. In certain embodiments, a protecting group is used to mask an alcohol moiety while performing other chemical transformations. After removal of the protecting group, the free hydroxyl is obtained. Such protecting groups and strategies are well known in the art.
Although various embodiments of the invention are disclosed herein, many adaptations and modifications may be made within the scope of the invention in accordance with the common general knowledge of those skilled in this art. Such modifications include the substitution of known equivalents for any aspect of the invention in order to achieve the same result in substantially the same way. Numeric ranges are inclusive of the numbers defining the range. The word “comprising” is used herein as an open-ended term, substantially equivalent to the phrase “including, but not limited to”, and the word “comprises” has a corresponding meaning. As used herein, the singular forms “a”, “an” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a thing” includes more than one such thing. Citation of references herein is not an admission that such references are prior art to the present invention. Any priority document(s) and all publications, including but not limited to patents and patent applications, cited in this specification are incorporated herein by reference as if each individual publication were specifically and individually indicated to be incorporated by reference herein and as though fully set forth herein. The invention includes all embodiments and variations substantially as hereinbefore described and with reference to the examples and drawings.

## Claims

1. A method for modulating androgen receptor activity, comprising:
administering to a patient in need thereof a compound having the following structure (I):




or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein:
wherein:
X is —C(R3R4)—;
R1 and R2 are each independently H, halogen, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, —OH, —OR5, —O(C1-C6)alkyl, —OC(═O)R13, C1-C10 acyl, —S(O)0-2R5, —NO2, —CN, —NH2, —NHR5, —N(R5R6), —CO2H, CO2R14, or CONR5R6;
R3 and R4 are each independently H, C1-C10 alkyl, C2-C10 alkenyl, or C2-C10 alkynyl;
R5 and R6 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, or C2-C10 alkynyl;
R7 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, aminocarbonyl, C1-C10 alkylcarbonyl, C2-C10 alkenylcarbonyl, C2-C10 alkynylcarbonyl, alkylaminocarbonyl, C2-C10 alkenylaminocarbonyl, or C2-C10 alkynylaminocarbonyl;
R13 is each independently C1-C10 alkyl, C2-C10 alkenyl, or C2-C10 alkynyl;
R14 is each independently H, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or aryl;
L1 is hydroxyl or —OC(═O)R13;
L2 and L3 are each independently H, halogen, hydroxyl, —OC(═O)R13, —OC1-C10 alkyl, —OC2-C10 alkenyl, —OC2-C10 alkynyl, —OR15,—SR5, —NR5R6, —O(C1-C10 acyl), —OC1-C10 alkylene-(—O—C1-C10 alkyl)p, —OC1-C10 alkylene-(—O—C2-C10 alkynyl)p, —OC1-C10 alkylene-(—O—C2-C10 alkenyl)p, —OC2-C10 alkenylene-(—O—C1-C10 alkyl)p, —OC2-C10 alkenylene-(—O—C2-C10 alkenyl)p, —OC2-C10 alkenylene-(—O—C2-C10 alkynyl)p, —OC2-C10 alkynylene-(—O—C1-C10 alkyl)p, —OC2-C10 alkynylene-(—O—C1-C10 alkenyl)p, —OC2-C10 alkynylene-(—O—C2-C10 alkynyl)p, carbocyclyl, aryl, heterocyclyl, or heteroaryl;
wherein at least one of L2 and L3 is a hydroxyl, —OC(═O)R13, substituted or unsubstituted carbocyclyl, substituted or unsubstituted aryl, substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl;
R15 is each independently selected from the group consisting of














wherein aa is a naturally occurring amino acid side chain and n is an integer from 1 to 200; and
a, b and c, are each independently 0, 1, 2, 3, 4, 5, or 6;
m and n are each independently 0,1, 2, 3, or 4; and
p is 1, 2, 3, or 4.

2. The method of claim 1, wherein the modulating androgen receptor activity is for treating a condition or disease selected from the group consisting of: prostate cancer, breast cancer, ovarian cancer, endometrial cancer, salivary gland carcinoma, hair loss, acne, hirsutism, ovarian cysts, polycystic ovary disease, precocious puberty, spinal and bulbar muscular atrophy, and age-related macular degeneration.

3. The method of claim 2, wherein the condition or disease is prostate cancer.

4. The method of claim 3, wherein the condition or disease is androgen-dependent prostate cancer.

5. The method of claim 1, wherein R1 and R2 are each independently H, —CN, or halogen.

6. The method of claim 1, wherein R3and R4 are each methyl.

7. The compound of claim 1, wherein at least one of L2 and L3 is substituted or unsubstituted group selected from a pyrrole, furan, thiophene, pyrazole, pyridine, pyridazine, pyrimidine, imidazole, thiazole, isoxazole, oxadiazole, thiadiazole, oxazole, triazole, isothiazole, triazine, tetrazine, oxazine, azepine, pyrrolidine, pyrroline, imidazoline, imidazolidine, pyrazoline, pyrazolidine, piperidine, dioxane, morpholine, dithiane, thiomorpholine, or piperazine.

8. The method of claim 1, wherein:
a) a is 0 or 1;
b) b is 0 or 1; or
c) c is 0 or 1.

9. The method of claim 1, wherein the compound has one of the following structures (Ia), (Ib), (Ic) or (Id):

10. The method of claim 1, wherein the compound is:






or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof.