Abstract:
This invention is concerned with certain 3-(thiazolidin-2&#39;-yl)-substituted phenyl sulfonamides which find utility as intermediates in the preparation of photographic image dye-providing materials.

Description:
FIELD OF THE INVENTION 
     This invention relates to certain 3-(thiazolidin-2&#39;-yl)-4-hydroxy-phenyl sulfonamides useful as intermediates in the preparation of photographic image dye-providing materials. 
     BACKGROUND OF THE INVENTION 
     U.S. Pat. No. 3,719,489 describes and claims photographic processes employing initially photographically inert compounds which are capable of undergoing cleavage in the presence of the imagewise distribution of silver ions made available during processing of a silver halide emulsion to liberate a reagent, such as, a photographically active reagent or a dye in an imagewise distribution corresponding to that of said silver ions. In one embodiment disclosed therein, color images are produced by using as the photographically inert compounds, color providing compounds which are substantially non-diffusible in the photographic processing composition but capable of undergoing cleavage in the presence of the imagewise distribution of silver ions and/or soluble silver complex made available in the undeveloped and partially developed areas of a silver halide emulsion as a function of development to liberate a more mobile and diffusible color-providing moiety in an imagewise distribution corresponding to the imagewise distribution of said ions and/or said complex. The subsequent formation of a color image is the result of the differential in diffusibility between the parent compound and liberated color-providing moiety whereby the imagewise distribution of the more diffusible color-providing moiety released in the undeveloped and partially developed areas is free to transfer. 
     Compounds disclosed as useful in liberating a reagent in the presence of said silver ions and/or silver complex are sulfur-nitrogen compounds containing the group ##STR1## or --S--X--N═ wherein X is ##STR2## These 1,3-sulfur-nitrogen compounds may be linear or cyclic in structure, and in a preferred embodiment are cyclic compounds, such as, thiazolidine compounds which comprise a dye radical having the chromophoric system of an azo, anthraquinone, phthalocyanine or other dye and a thiazolidin-2&#39;-yl moiety which may be bonded directly to the dye radical or through an appropriate linking group. 
     U.S. Pat. No. 4,098,783, a continuation-in-part of Ser. No. 465,694, now abandoned, which is a division of said U.S. Pat. No. 3,719,489 discloses that dyes substituted with a thiazolidin-2&#39;-yl moiety may be synthesized by condensing a dye possessing an aldehyde group with a 2-aminoethanethiol, or rather than forming the thiazolidin-2-yl moiety as the final step in the synthesis, an intermediate possessing an aldehyde group may be condensed with the selected 2-aminoethanethiol and the condensation product then reacted with the appropriate molecule or molecules to yield the final dye product. For example, an intermediate comprising a linking group substituted with a thiazolidin-2&#39;-yl moiety may be synthesized from a selected aldehyde in several steps including the condensation with a 2-aminoethanethiol and the linking group then reacted as an amine with a dye radical possessing, e.g., a sulfonyl chloride substituent or it may be reacted as a sulfonyl chloride with a dye radical possessing an amino substituent. 
     U.S. Pat. No. 4,355,169 of Donald A. McGowan and Frank A. Meneghini discloses and claims certain thiazolidine-substituted phenyl sulfonamides derived from alkylene diamines, namely, 3-(thiazolidin-2&#39;-yl)-4-hydroxy-phenyl-w-aminoethylsulfonamides. 
     The present invention is directed to a different class of thiazolidine-substituted phenyl sulfonamides. 
     SUMMARY OF THE INVENTION 
     According to the present invention, a new class of 3-(thiazolidin-2&#39;-yl)-4-hydroxy-phenyl sulfonamides is provided which are derived from bis(w-aminoalkyl)amines. Because they contain two free primary amino groups rather than one for reaction with the selected dye molecule, they may be used for synthesizing image dye-providing materials possessing one dye moiety together with an amino solubilizing group, of if desired, image dye-providing materials possessing two dye moieties. 
     It is, therefore, the pirmary object of the present invention to provide certain 3-(thiazolidin-2&#39;-yl)-4-hydroxy-phenyl sulfonamides. 
     Other objects of the present invention will in part be obvious and will in part appear hereinafter. 
     The invention accordingly comprises the products and compositions possessing the features, properties and relation of elements which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims. 
     For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description. 
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Specifically, the 3-(thiazolidin-2&#39;-yl)substituted phenyl sulfonamides of the present invention may be represented by the formula ##STR3## wherein R is selected from alkyl, aryl, aralkyl and alkaryl; R 1 , R 2 , R 3  and R 4  each are selected from hydrogen, alkyl, aryl, aralkyl and alkaryl; and m is 2 to 10. 
     Typical aryl groups include phenyl and biphenyl and said alkyl groups comprising R, R 1 , R 2 , R 3  and R 4  usually contain 1 to 20 carbon atoms. Said aralkyl may be, for example, phenyl-substituted alkyl wherein said alkyl usually contains 1 to 20 carbon atoms, and said alkaryl may be, for example, alkyl-substituted phenyl wherein said alkyl usually contains 1 to 20 carbon atoms. Preferably, when R is alkyl, it contains at least 10 carbon atoms, i.e., 10 to 20 carbon atoms. 
     The subject compounds are prepared by reacting a bis(w-aminoalkyl)amine with trifluoroacetic anhydride to give the corresponding tris amide and then removing the trifluoroacetyl blocking group from the secondary amino group with aqueous-ethanolic potassium carbonate at room temperature to give the bis amide. The bis amide is then reacted with the selected thiazolidine-substituted phenyl sulfonyl chloride or its hydrochloride salt and the reaction product refluxed with aqueous-methanolic potassium carbonate to remove the remaining blocking groups and give the sulfonamide product. 
     Typical sulfonyl chlorides that may be employed are those having the formula ##STR4## wherein R, R 1 , R 2 , R 3  and R 4  have the same meaning given above and R 5  is hydrogen or acyl, for example, acetyl, benzoyl or tosyl. The alkyl and other groups comprising R, R 1 , R 2 , R 3  and R 4  may be unsubstituted or substituted with alkoxy, hydroxy, alkyl, carboxamido, sulfonamido, N,N-dialkylamino or other appropriate groups. 
     The aforementioned sulfonyl chlorides form the subject matter of U.S. patent Ser. No. 4,336,387 issued to Myron S. Simon on June 22, 1982 and may be prepared from the corresponding aniline as disclosed therein or may be prepared via direct sulfonation of salicylaldehyde as disclosed and claimed in U.S. Pat. No. 4,332,950 issued to Charles A. Kelly and Frank A. Meneghini on June 1, 1982. 
     The amine reactants for providing the bis amides are known compounds that can be synthesized in a conventional manner and many are available commercially. 
    
    
     The following example is given to further illustrate the present invention and is not intended to limit the scope thereof. 
     EXAMPLE 
     Preparation of the compound having the formula ##STR5## 
     (a) b 15 gms [1.46×10 -1  moles] of bis(2-aminoethyl)amine (15.3 ml) was stirred in 250 ml of tetrahydrofuran (THF) at 0° C. with 4.43 gms [4.38×10 -1  moles] (61 ml) of triethylamine while 92 gms [4.38×10 -1  mole] (62 ml) of trifluoroacetic anhydride was added dropwise in 50 ml of THF over one hour. The reaction was stirred for one hour longer at room temperature, after addition, and worked up. The reaction was stripped of solvent and redissolved in ethyl acetate. The organics were washed 2×1N HCl, 2×water, brined, dried over magnesium sulfate and rotovaped down. An oil crystallized upon standing, and the tris trifluoroacetyl amide was recrystallized by displacing it from 50 ml of methanol into 600 ml of chloroform with heat. Yield 37.4 gms (65.5% by weight). 
     (b) 1 gm [2.56×10 -3  moles] of the tris amide prepared in step (a) was stirred in 30 ml of 95% ethanol together with 3.54 gms [2.56×10 -2  moles] of powered potassium carbonate and 14 ml of water for 4 hours at room temperature. The ethanol was removed via rotoevaporation and the aqueous layer was extracted with ethyl acetate. The organics were washed with water and brine, dried over sodium sulfate and rotovaped to dryness. The bis amide product having the formula ##STR6## solidified after 24 hours. Yield 218 mg (29.0% by weight) 
     (c) 218 mg [7.42×10 -4  moles] of the bis amide was stirred and refluxed in 25 ml of THF with 493 mg [7.42×10 -4  moles] of 3-(5&#39;,5&#39;-dimethyl-N-n-octadecyl-thiazolidin-2&#39;-yl)-4-benzoyloxy-phenyl sulfonyl chloride and 76 mg [7.52×10 -4  moles] of triethylamine under nitrogen for 24 hours. The reaction product was rotovaped down and dissolved in ethyl acetate. The organics were washed 2×1N HCl, sodium bicarbonate solution, brine/HCl, dried over sodium sulfate and rotovaped down. The crude product was placed on a column of SiO 2  (Woelm TSC dry column) and eluted with chloroform to give 351 mgs (51.2% by weight yield) of the trifluoroacetyl blocked compound of the formula ##STR7## 
     (d) 351 mgs [3.94×10 -4  moles] of the blocked compound of step (c) was refluxed in 20 ml of methanol with 8 ml of 7% aqueous potassium carbonate for 5 hours. The product was rotovaped down and redissolved in chloroform. This solution was poured into 1N HCl (formed tris HCl salt precipitate), neutralized with saturated sodium bicarbonate solution and extracted with 2 portions of chloroform. The organics were combined and brined (emulsion), dried over sodium sulfate and rotovaped down to give 210 mgs of the title compound. (90% by weight yield). 
     As noted above, the sulfonamides of the subject invention are useful as intermediates in the synthesis of photographic image dye-providing materials, such as, the thiazolidine-substituted dyes described in aforementioned U.S. Pat. Nos. 3,719,489 and 4,098,783. For this purpose, the subject compounds may be reacted with a dye substituted with, e.g., a --COCl or --SO 2  Cl group to give the image dye-providing material. 
     Examples of other image dye-providing compounds that may be prepared from the subject intermediates are those disclosed in U.S. Pat. No. 4,264,701. 
     Since certain changes may be made in the herein described subject matter without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description and examples be interpreted as illustrative and not in a limiting sense.