bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tailoring of Polarizing Agents in the bTurea Series for Cross‐Effect Dynamic Nuclear Polarization in Aqueous Media
Authors: Sauvée Claire , Casano Gilles , Abel Sébastien , Rockenbauer Antal , Akhmetzyanov Dimitry , Karoui Hakim , Siri Didier , Aussenac Fabien , Maas Werner , Weber Ralph T. , Prisner Thomas , Rosay Mélanie , Tordo Paul , Ouari Olivier 
Published: March 2016

AbstractA series of 18 nitroxide biradicals derived from bTurea has been prepared, and their enhancement factors ɛ (1H) in cross‐effect dynamic nuclear polarization (CE DNP) NMR experiments at 9.4 and 14.1 T and 100 K in a DNP‐optimized glycerol/water matrix (“DNP juice”) have been studied. We observe that ɛ (1H) is strongly correlated with the substituents on the polarizing agents, and its trend is discussed in terms of different molecular parameters: solubility, average e–e distance, relative orientation of the nitroxide moieties, and electron spin relaxation times. We show that too short an e–e distance or too long a T1e can dramatically limit ɛ (1H). Our study also shows that the molecular structure of AMUPol is not optimal and its ɛ (1H) could be further improved through stronger interaction with the glassy matrix and a better orientation of the TEMPO moieties. A new AMUPol derivative introduced here provides a better ɛ (1H) than AMUPol itself (by a factor of ca. 1.2).
Enolizable Carbonyls and N,O‐Acetals: A Rational Approach for Room‐Temperature Lewis Superacid‐Catalyzed Direct α‐Amidoalkylation of Ketones and Aldehydes
Authors: Touati Bahria , El Bouakher Abderrahman , Taillier Catherine , Othman Raja Ben , Trabelsi‐Ayadi Malika , Antoniotti Sylvain , Duñach Elisabet , Dalla Vincent 
Published: March 2016

AbstractAn efficient catalytic room‐temperature direct α‐amidoalkylation of carbonyl donors, that is, ketones and aldehydes with unbiased N,O‐acetals, is described. Sn(NTf2)4 is an optimal catalyst to promote this challenging transformation at low loading and the reaction shows promising scope. A comprehensive and rational evaluation of this reaction has led to the establishment of an empirical scale of nucleophilic reactivity for a broad set of ketones that should be helpful in the synthetic design and development of carbonyl α‐functionalization methods.
A Bis(methylpiperazinylstyryl)phenanthroline as a Fluorescent Ligand for G‐Quadruplexes
Authors: Wu Shangrong , Wang Linlin , Zhang Nan , Liu Ying , Zheng Wei , Chang Ang , Wang Fuyi , Li Songqin , Shangguan Dihua 
Published: March 2016

AbstractG‐quadruplex (G4)‐forming sequences are prevalent in the genome and are considered to play important roles in gene regulation, and hence have been viewed as potential therapeutic targets in oncology. However, the structures and functions of most G4s in the genome are poorly understood. Therefore, the development of fluorescent probes and ligands for G4s is important for G4 research and drug discovery. Herein, we report a new G4 ligand, 2,9‐bis[4‐(4‐methylpiperazin‐1‐yl)styryl]‐1,10‐phenanthroline (BMSP), which was synthesized by a simple process. BMSP exhibits almost no fluorescence in aqueous buffer. The interaction of BMSP with G4s greatly enhances its fluorescence with a large Stokes’ shift of 160 nm. Antiparallel human telomeric G4s exhibit the strongest binding affinity (Kd≈0.13 μm) to BMSP and induce a fluorescence enhancement of up to 150‐fold. BMSP binds to G4s through π–π stacking on the terminal G‐quartets. BMSP can enter live cells, and it strongly inhibits the growth of cancer cells rather than causing cell death. Our results suggest that BMSP has the potential to serve both as a fluorescent probe for some G4s and as a chemotherapeutic agent for cancer treatment.
Dual Palladium(II)/Tertiary Amine Catalysis for Asymmetric Regioselective Rearrangements of Allylic Carbamates
Authors: Bauer Johannes Moritz , Frey Wolfgang , Peters René 
Published: March 2016

AbstractThe streamlined catalytic access to enantiopure allylic amines as valuable precursors towards chiral β‐ and γ‐aminoalcohols as well as α‐ and β‐aminoacids is desirable for industrial purposes. In this article an enantioselective method is described that transforms achiral allylic alcohols and N‐tosylisocyanate in a single step into highly enantioenriched N‐tosyl protected allylic amines via an allylic carbamate intermediate. The latter is likely to undergo a cyclisation‐induced [3,3]‐rearrangement catalysed by a planar chiral pentaphenylferrocene palladacycle in cooperation with a tertiary amine base. The otherwise often indispensable activation of palladacycle catalysts by a silver salt is not required in the present case and there is also no need for an inert gas atmosphere. To further improve the synthetic value, the rearrangement was used to form dimethylaminosulfonyl‐protected allylic amines, which can be deprotected under non‐reductive conditions.
Highly Active and Robust Metalloporphyrin Catalysts for the Synthesis of Cyclic Carbonates from a Broad Range of Epoxides and Carbon Dioxide
Authors: Maeda Chihiro , Shimonishi Junta , Miyazaki Ray , Hasegawa Jun‐ya , Ema Tadashi 
Published: March 2016

AbstractBifunctional metalloporphyrins with quaternary ammonium bromides (nucleophiles) at the meta, para, or ortho positions of meso‐phenyl groups were synthesized as catalysts for the formation of cyclic carbonates from epoxides and carbon dioxide under solvent‐free conditions. The meta‐substituted catalysts exhibited high catalytic performance, whereas the para‐ and ortho‐substituted catalysts showed moderate and low activity, respectively. DFT calculations revealed the origin of the advantage of the meta‐substituted catalyst, which could use the flexible quaternary ammonium cation at the meta position to stabilize various anionic species generated during catalysis. A zinc(II) porphyrin with eight nucleophiles at the meta positions showed very high catalytic activity (turnover number (TON)=240 000 at 120 °C, turnover frequency (TOF)=31 500 h−1 at 170 °C) at an initial CO2 pressure of 1.7 MPa; catalyzed the reaction even at atmospheric CO2 pressure (balloon) at ambient temperature (20 °C); and was applicable to a broad range of substrates, including terminal and internal epoxides.
Dithioacetal Exchange: A New Reversible Reaction for Dynamic Combinatorial Chemistry
Authors: Orrillo A. Gastón , Escalante Andrea M. , Furlan Ricardo L. E. 
Published: March 2016

AbstractReversibility of dithioacetal bond formation is reported under acidic mild conditions. Its utility for dynamic combinatorial chemistry was explored by combining it with orthogonal disulfide exchange. In such a setup, thiols are positioned at the intersection of both chemistries, constituting a connecting node between temporally separated networks.
A General and Selective Rhodium‐Catalyzed Reduction of Amides, N‐Acyl Amino Esters, and Dipeptides Using Phenylsilane
Authors: Das Shoubhik , Li Yuehui , Lu Liang‐Qiu , Junge Kathrin , Beller Matthias 
Published: March 2016

AbstractThis article describes a selective reduction of functionalized amides, including N‐acyl amino esters and dipeptides, to the corresponding amines using simple [Rh(acac)(cod)]. The catalyst shows excellent chemoselectivity in the presence of different sensitive functional moieties.
Development of a syn‐Selective Mannich Reaction of Aldehydes with Propargylic Imines by Dual Catalysis: Asymmetric Synthesis of Functionalized Propargylic Amines
Authors: Lapuerta Irati , Vera Silvia , Oiarbide Mikel , Palomo Claudio 
Published: March 2016

AbstractDirect coupling of enolizable aldehydes with C‐alkynyl imines is realized affording the corresponding propargylic Mannich adducts of syn configuration, thus complementing previous methods that gave access to the anti‐isomers. The combination of proline and a urea Brønsted base cocatalyst is key for the reactions to proceed under very mild conditions (3–10 mol % catalyst loading, dichloromethane as solvent, −20 °C, 1.2 molar equivalents of aldehyde) and with virtually total stereocontrol (syn/anti ratio up to 99:1; ee up to 99 %). Some possibilities of further chemical elaboration of adducts are also briefly illustrated.
An Immucillin‐Based Transition‐State‐Analogous Inhibitor of tRNA–Guanine Transglycosylase (TGT)
Authors: Hohn Christoph , Härtsch Adrian , Ehrmann Frederik Rainer , Pfaffeneder Toni , Trapp Nils , Dumele Oliver , Klebe Gerhard , Diederich François 
Published: March 2016

AbstractShigellosis is one of the most severe diarrheal diseases worldwide without any efficient treatment so far. The enzyme tRNA–guanine transglycosylase (TGT) has been identified as a promising target for small‐molecule drug design. Herein, we report a transition‐state analogue, a small, immucillin‐derived inhibitor, as a new lead structure with a novel mode of action. The complex inhibitor synthesis was accomplished in 18 steps with an overall yield of 3 %. A co‐crystal structure of the inhibitor bound to Z. mobilis TGT confirmed the predicted conformation of the immucillin derivative in the enzyme active site.
Computational SN2‐Type Mechanism for the Difluoromethylation of Lithium Enolate with Fluoroform through Bimetallic C−F Bond Dual Activation
Authors: Honda Kazuya , Harris Travis V. , Hatanaka Miho , Morokuma Keiji , Mikami Koichi 
Published: March 2016

AbstractThe reaction mechanism for difluoromethylation of lithium enolates with fluoroform was analyzed computationally (DFT calculations with the artificial force induced reaction (AFIR) method and solvation model based on density (SMD) solvation model (THF)), showing an SN2‐type carbon–carbon bond formation; the “bimetallic” lithium enolate and lithium trifluoromethyl carbenoid exert the C−F bond “dual” activation, in contrast to the monometallic butterfly‐shaped carbenoid in the Simmons–Smith reaction. Lithium enolates, generated by the reaction of 2 equiv. of lithium hexamethyldisilazide (rather than 1 or 3 equiv.) with the cheap difluoromethylating species fluoroform, are the most useful alkali metal intermediates for the synthesis of pharmaceutically important α‐difluoromethylated carbonyl products.
Cobalt‐Catalyzed Oxidase C−H/N−H Alkyne Annulation: Mechanistic Insights and Access to Anticancer Agents
Authors: Mei Ruhuai , Wang Hui , Warratz Svenja , Macgregor Stuart A. , Ackermann Lutz 
Published: March 2016

AbstractCp*‐free cobalt‐catalyzed alkyne annulations by C−H/N−H functionalizations were accomplished with molecular O2 as the sole oxidant. The user‐friendly oxidase strategy proved viable with various internal and terminal alkynes through kinetically relevant C−H cobaltation, providing among others step‐economical access to the anticancer topoisomerase‐I inhibitor 21,22‐dimethoxyrosettacin. DFT calculations suggest that electronic effects control the regioselectivity of the alkyne insertion step.
Carboxylation of Phenols with CO2 at Atmospheric Pressure
Authors: Luo Junfei , Preciado Sara , Xie Pan , Larrosa Igor 
Published: March 2016

AbstractA convenient and efficient method for the ortho‐carboxylation of phenols under atmospheric CO2 pressure has been developed. This method provides an alternative to the previously reported Kolbe–Schmitt method, which requires very high pressures of CO2. The addition of a trisubstituted phenol has proved essential for the successful carboxylation of phenols with CO2 at standard atmospheric pressure, allowing the efficient preparation of a broad variety of salicylic acids.
Defined Palladium–Phthalimidato Catalysts for Improved Oxidative Amination
Authors: Martínez Claudio , Muñiz Kilian 
Published: March 2016

AbstractNew palladium(II)–phthalimidato complexes have been synthesized, isolated, and structurally characterized. As demonstrated from over 30 examples, they constitute superior catalysts for oxidative amination reactions of alkenes with phthalimide as the nitrogen source. This work streamlines vicinal difunctionalization of alkenes and provides access to significantly improved and experimentally simplified synthetic protocols.
Synthesis of the First Example of the 12‐Vertex‐closo/12‐Vertex‐nido Biscarborane Cluster by a Metal‐Free B−H Activation at a Phosphorus(III) Center
Authors: Wong Yuen Onn , Smith Mark D. , Peryshkov Dmitry V. 
Published: March 2016

AbstractAn unusual 12‐vertex‐closo‐C2B10/12‐vertex‐nido‐C2B10 biscarborane cluster was synthesized through an unprecedented regioselective metal‐free B−H activation by a sterically hindered PIII center under mild conditions accompanied by cage‐opening rearrangement. A combination of the electron‐accepting properties of a carborane cage and steric enforcement of close interatomic contacts represent a new synthetic strategy for the activation of strong B−H bonds in carboranes.
A Photoresponsive Surface Covalent Organic Framework: Surface‐Confined Synthesis, Isomerization, and Controlled Guest Capture and Release
Authors: Liu Chunhua , Zhang Wei , Zeng Qingdao , Lei Shengbin 
Published: March 2016

AbstractBy introducing an azobenzene group to the backbone of diboronic acid, we have obtained a surface‐confined, photoresponsive single‐layer covalent organic framework with long‐range order and almost entire surface coverage. Scanning tunneling microscopic characterization indicates that though the covalent linkage provides a significant locking effect, isomerization can still happen under UV irradiation, which causes destruction of the surface COF. Furthermore, the decomposed surface COF can recover upon annealing. This photoinduced decomposition provides a facile approach for the controlled capture and release of targeted objects using these nanoporous surface COFs as a host, which has been demonstrated in this work using copper phthalocyanine as a model guest.
Catalytic Asymmetric Cycloaddition of In Situ‐Generated ortho‐Quinone Methides and Azlactones by a Triple Brønsted Acid Activation Strategy
Authors: Yu Xiao‐Ye , Chen Jia‐Rong , Wei Qiang , Cheng Hong‐Gang , Liu Zhi‐Cheng , Xiao Wen‐Jing 
Published: March 2016

AbstractA convergent and highly stereoselective [4+2] cycloaddition of in situ‐generated ortho‐Quinone methides (o‐QMs) and azlactone enols has been successfully developed through a triple Brønsted acid catalysis strategy. This protocol provides an efficient and mild access to various densely functionalized dihydrocoumarins bearing adjacent quaternary and tertiary stereogenic centers in high yields with excellent diastereo‐ and enantioselectivity.
ChemInform Abstract: FLUORIDE ION AFFINITY OF SOME LEWIS ACIDS
Authors: HAARTZ J. C. , MCDANIEL DARL H. 
Published: March 2016

AbstractDie Fähigkeit der Lewis‐Säuren SO2, HCl, HBr, BCl3, BF3, PF5, SiF4, AsF5, SbF6 und von Kombinationen davon, Addukte mit F‐ zu bilden, wird durch Ionen‐Cyclotronresonanzspektroskopie untersucht.
ChemInform Abstract: BESTIMMUNG DER KINETISCHEN PARAMETER DER OBERFLAECHENREAKTION ELEKTROCHEMISCHER UND ANDERER HETEROGEN‐CHEMISCHER PROZESSE AN DER PHASENGRENZE FEST/FLUESSIG MIT DER METHODE DER ROTIERENDEN SCHEIBE
Authors: MUELLER LOTHAR 
Published: March 2016

AbstractEs wird zusammenfassend über 2 Verfahren zur Bestimmung der Geschwindigkeit von Reaktionen an der Phasengrenze fest/ flüssig berichtet.
ChemInform Abstract: GLASS‐RANEY NICKEL TABLET CATALYST
Authors: YASUMURA JIRO , NAKABAYASHI ICHIRO , ENDO TADASHI 
Published: March 2016

AbstractAus Mischungen eines Glaspulvers mit 30 oder 50% Raney‐Ni wurden Tabletten gepreßt, diese bei 760‐900°C gesintert und danach zur Aktivierung mit wäßriger NaOH‐ Lösung behandelt.
ChemInform Abstract: ENANTIOMEREN‐REINHEIT UND ABSOLUTE KONFIGURATION VON DURCH ASYMMETRISCHE SYNTHESE DARGESTELLTER BETA‐HYDROXY‐BETA‐TRIFLUORMETHYL‐BETA‐PHENYL‐PROPIONSAEURE
Authors: MIOSKOWSKI C. , SOLLADIE G. 
Published: March 2016

AbstractVon der aus dem Keton (I) mit dem Acetat (II) erhaltenen Säure (III) wird in Gegenwart eines chiralen Europium‐Komplexes die Enantiomeren‐Reinheit bestimmt.
ChemInform Abstract: PHOTOCHEMIE DES 3‐METHYL‐CYCLOPENTANONS, SYNTHESE VON OPTISCH AKTIVEM DIHYDROTAGETON
Authors: LEFEBVRE BERNARD , LE ROUX JEAN‐PIERRE , KOSSANYI JEAN , BASSELIER JEAN‐JACQUES 
Published: March 2016

AbstractAus den Produkten der Photoisomerisierung des (+)‐Methylcyclopentanons (I) unter der Einwirkung von UV‐Licht in O2‐freiem Pentan läßt sich dünnschichtchromatogra‐ phisch der (+)‐Aldehyd (II) abtrennen.
ChemInform Abstract: DI‐ AND TRIMETHYL‐2‐CYCLOHEXENONES
Authors: WENKERT E. , GOLOB N. F. , SMITH R. A. J. 
Published: March 2016

AbstractDas Dimethylcyclohexenon (I) reagiert mit Methylmagnesiumbromid zum Addukt (II) und wird durch Chromsäure zu (IIIa) oxidiert, aus dem mit N‐Bromsuccinimid das Bromderivat (IIIb) ensteht, das leicht zu (IV) dehydrobromiert wird.
ChemInform Abstract: INVESTIGATION OF THE RELATIONSHIP BETWEEN LIPID‐LEVEL DECREASING EFFECT AND STRUKTURE IN THE SERIES OF GLYOXYLIC ACID PHENYLACETALS PART 2
Authors: FISCHER J. , TOTH G. , FODOR T. , RAKOCZI J. 
Published: March 2016

AbstractBei UV‐Bestrahlung reagiert das Acetal (I) mit Brom unter Bildung des Äthers (II), der sich mit Alkoholen, Alkoholaten und Phenolaten zu gemischten Acetalen umsetzen läßt, so z.B. mit Methanol in Äther in Gegenwart von Pyridin zu (IIIa) und mit Na‐2‐brom‐4‐chlor‐phenolat zu (IIIb).
ChemInform Abstract: CONFORMATIONAL AND CONFIGURATIONAL STUDIES OF SOME DIETHYL 2,3‐DIARYLSUCCINATES USING NUCLEAR MAGNETIC RESONANCE
Authors: GORTLER L. , BRANDSPIGEL K. , HARMAN E. , HECHT S. , LEAVITT R. 
Published: March 2016

AbstractAus den Benzaldehyden (I) und Benzylcyanid (II) entstehen die Diarylacrylnitrile (III), die mit HCN in die Addukte (IV) übergehen und dann zu den Diaryl‐bernsteinsäureestern (V) umgesetzt werden können.
ChemInform Abstract: TRIARYLMETHANES PART 5, BEHAVIOUR OF NAPHTHOQUINONE DIPHENYLMETHIDES TOWARDS AMINES AND DIAZOMETHANE
Authors: ELKASCHEF MOHAMED A.‐F. , ABDEL‐MEGEID FAROUK M. E. , ELZEIN SALAH M. M. 
Published: March 2016

AbstractDas Diphenylmethid (I) reagiert mit den Aminen (II) bei Raumtemperatur zu den entsprechenden Triarylmethylaminen (III).
ChemInform Abstract: 5‐SUBSTITUIERTE 2‐THIAZOLIN‐4‐CARBONSAEUREAETHYLESTER
Authors: SCHOELLKOPF ULRICH , HOPPE DIETER 
Published: March 2016

AbstractDurch Reaktion der Isonlitril‐ester (I) mit Schwefelwasserstoff werden die Titelverbindungen (II) dargestellt (Diskussion des Reaktionsmechanismus).
ChemInform Abstract: STUDIES ON AROMATIC BASIC ETHERS WITH ANTISPASMODIC ACTIVITY PART 3, CONFIGURATION OF ALKYL OR ARYL 3‐(2‐METHYLPIPERIDINO)‐1‐PHENYLPROPYL ETHER DERIVATIVES
Authors: YOSHIDA A. , MORITA M. , OGAWA S. 
Published: March 2016

AbstractDurch Natriumborhydrid‐Reduktion des Ketons (I) erhält man die diastereoisomeren Alkohole (II), die durch Reaktion mit Thionylchlorid, Reaktion mit Phenolaten und Methylierung mit Methyljodid in (III), (IV) und (V‐) umgewandelt werden.
ChemInform Abstract: STEREOSELECTIVITY IN THE BASE‐CATALYZED DECARBOXYLATION OF 5,5‐DICARBOXY‐2‐ISOPROPYL‐1,3‐DIOXANE
Authors: BANKS H. D. 
Published: March 2016

Abstract5,5‐Dicarboxy‐2‐isopropyl‐1,3‐dioxan (I) wird der Decarboxylierung zu den isomeren Carbonsäuren (II) und (III) unterworfen.
ChemInform Abstract: STEREOCHEMIE IM INNERN CYCLISCHER VERBINDUNGEN, KRONENAETHER, KATAPINATE UND KRYPTATE
Authors: VOEGTLE F. , NEUMANN P. 
Published: March 2016

AbstractDie Autoren geben einen Überblick über die neueste Entwicklung auf dem Gebiet der Kronenäther‐Komplexe und Kryptate und legen das Schwergewicht auf die sehr interessante Stereochemie solcher "Wirts"‐Moleküle.
ChemInform Abstract: HOMOATOMIC ORGANOARSINE LADDER POLYMERS, SYNTHESIS AND PHYSICAL PROPERTIES
Authors: RHEINGOLD ARNOLD L. , LEWIS JOHN E. , BELLAMA JON M. 
Published: March 2016

AbstractLeiterpolymere (I) der CH3‐As=‐Gruppe mit hohem Molekulargewicht werden in makrokristalliner Form durch die Reaktion von Methylarsin mit Methyldihalogenoarsin oder durch katalysierte Umlagerung der cyclischen Oligomeren (CH3As)5 dargestellt.
ChemInform Abstract: ARSENORGANO‐VERBINDUNGEN 22. MITT. ZUR SYNTHESE DER 1,3‐BENZAZARSOLINE
Authors: TZSCHACH A. , DROHNE D. , HEINICKE J. 
Published: March 2016

AbstractDie elektrochemische Reduktion der o‐Nitrophenylarsonsäure (I) liefert in guter Ausbeute o‐Aminophenylarsin (II), das in flüssigem Ammoniak zu (III) metallierbar ist.
ChemInform Abstract: MU(3)‐OXOTRIMETAL ACETATO‐COMPLEXES OF CHROMIUM, MANGANESE, IRON, COBALT, RHODIUM, AND IRIDIUM
Authors: UEMURA SAKAE , SPENCER ALWYN , WILKINSON GEOFFREY 
Published: March 2016

AbstractDie Komplexe (I) werden durch Umsetzung entsprechender Metall(III)‐Salze mit Na‐acetat und Essigsäure in Äthanol oder Wasser oder Oxidation entsprechender Metall(II)‐acetate zu Aquo‐Analogen der gewünschten Produkte und darauffolgende Reaktion mit den Pyridin‐Liganden in Gegenwart von Na‐perchlorat synthetisiert.
ChemInform Abstract: UEBER DEN CARBENANALOGEN CHARAKTER VON DICYCLOPENTADIENYLZINN(II)
Authors: ALBERT H. J. , SCHROEDER U. 
Published: March 2016

AbstractWährend Dicyclopentadienylzinn(II) (I) mit ungesättigten Kohlenwasserstoffen auch bei 200°C nicht reagiertyerhält es sich bei der spontanen Umsetzung mit Halogenen (II) als Carbenanalogon, wobei (III) entsteht.
ChemInform Abstract: COMPLEXES OF SEMICARBAZONES AND THIOSEMICARBAZONES WITH NICKEL(II)
Authors: BEECROFT B. , CAMPBELL M. J. M. , GRZESKOWIAK R. 
Published: March 2016

AbstractElektronen‐ und IR‐Spektren bestätigen für die durch Umsetzung von Ni‐halogeniden mit Semicarbazid oder Semicarbazonen gebildeten Komplexe: (I) eine sechsfachkoordinierte, tetragonale Struktur mit über 0‐ und hydrazinisches N‐gebund enen Liganden.
ChemInform Abstract: THE INTERACTION OF A CYCLO‐OCTA‐1,5‐DIENE‐IRIDIUM COMPLEX WITH MOLECULAR HYDROGEN
Authors: GARGANO M. , GIANNOCCARO P. , ROSSI M. 
Published: March 2016

AbstractDie Umsetzung des Ir(I)‐Komplexes (I) mit Wasserstoff führt zu dem IR‐ und NMR‐ spektroskopisch sowie durch Reaktion mit Triphenylphosphin charakterisierten Hydrido‐Komplex (II).
ChemInform Abstract: KATIONISCHE FARBSTOFFE FUER ACRYLFASERN 1. MITT. KATIONISCHE FARBSTOFFE AUSGEHEND VOM 2‐AMINO‐THIAZOL UND 2‐AMINOBENZOTHIAZOL
Authors: ALBERTI G. , CERNIANI A. , SEU G. 
Published: March 2016

AbstractDurch Diazotierung der Amine (I) und (IV) und nachfolgende Kupplung mit entsprechenden Anilinen werden die Azofarbstoffe (II) und (V) erhalten, die mit Dimethylsulfat bzw. Methyljodid quaternisiert werden können.
ChemInform Abstract: STUDIES ON TERPENES PART 3, SYNTHESIS OF (‐)‐NEOVERBANOL (PINAN‐4‐OL)
Authors: HOBBS PETER D. , MAGNUS PHILIP D. 
Published: March 2016

AbstractDie Struktur der Titelverbindung (IV) wird durch unabhängige Synthese ausgehend von (+)‐Nopinon (Ia) bewiesen: Bromierung von (Ia) gibt das α‐Bromid (Ib), aus dem beim Chromatographieren das Isomere (Ic) entsteht.
ChemInform Abstract: STEROID CONJUGATES PART 5, GLUCURONOSIDES OF 19‐OXYGENATED 3BETA‐HYDROXYANDROST‐5‐EN‐17‐ONES
Authors: NICHOLSON SYDNEY H. , SMITH DEREK S. H. , TURNER ALAN B. 
Published: March 2016

AbstractBei der Umsetzung der Androstenon‐Derivate (Ia) bzw. (Ib) mit dem Acetobromglucuronsäureester (II) nach der Kloenigs‐Knorr‐Methode werden die Monoglucuronoside (IIIa) bzw. (IIIb) erhalten.
ChemInform Abstract: ANWENDUNG DER RITTER‐REAKTION IN DER STEROID‐REIHE 3. MITT. SPALTUNG VON 4,5BETA‐EPOXY‐CHOLESTANEN MIT ACETONITRIL, KONFORMATION DER AMID‐GRUPPE
Authors: RYAN R. J. , JULIA S. 
Published: March 2016

AbstractBei der Umsetzung der 4,5‐Epoxy‐cholestanole (I), (III) bzw. (V) mit Acetonitril in Perchlorsäure erfolgt nach einem modifizierten SN2‐Mechanismus Spaltung der O‐C5‐Bindung, wobei (I) das trans‐diaxiale Amid (II) liefert, während (III) bzw. (V) unter Beteiligung der 3‐Funktion die Dihydrooxazine (IV) bzw. (VI) geben.
ChemInform Abstract: SYNTHESE UND EIGENSCHAFTEN VON D‐GLUCOSE‐SACCHARIN‐VERBINDUNGEN
Authors: KLEMER ALMUTH , UHLEMANN GERHARD , CHAHIN SUHAIL , DIAB MOHAMED N. 
Published: March 2016

AbstractDas Benzisothiazoldioxid (II) und die Glucosederivate (III) reagieren in Pyridin zu den Verbindungen (I); Spaltung mit Säuren oder Basen liefern die Ausgangszucker (III) glatt zurück.