A method to sensitize the red-sensitive halogen silver emulsion of a non-diffusible the dyestuff-forming agent containing more layers of material for producing multi-color images

摘要

Dyes of the general formula IV, wherein Y is O or S, L is an unsubstituted or substituted methine group (the several L's not necessarily having the same significance), d is 1 or 2, n is 1, 2 or 3, R and R1 are alkyl or substituted alkyl, R11 is unsubstituted or substituted alkyl or aryl, Z and Z1 are the non-metallic atoms to complete a 5- or 6-membered heterocyclic nucleus, which may have a fused-on arylene nucleus, A is substituted OH group, and X is an acid radical, are prepared by reacting a dye of formula V or a quaternary salt thereof with an intermediate of formula III. In examples, dyes are prepared by refluxing together in ethyl alcohol containing triethylamine (1) the reaction product of 5-(N1-methylbenzthiazolylidene - 21) - 2 - thio - 3 - methyl - 4-ketotetrahydrothiazole and methyl p-toluenesulphonate, and 2 - (b - methoxy : b - methyl-vinyl) FORM:0646137/IV (c)/1 FORM:0646137/IV (c)/2 FORM:0646137/IV (c)/3 - benzthiazole ethyl methyl sulphate; (2) the reaction product of 5-(N1-ethylbenzthiazolylidene - 21 - ethylidene) - 2 - thio - 3 - ethyl-4 - keto - tetrahydrothiazole and dimethyl sulphate and the intermediate of (1); (3) the reaction product of 5-(N1-ethylbenzthiazolylidene - 21) - b - phenylethylidene) - 2 - thio - 3-allyl - 4 - ketotetrahydrothiazole and dimethyl sulphate, and 2 - (b - ethoxy : b - methylvinyl) - benzselenazole diethyl sulphate; and (4) the reaction product of 5-(N1-methylquinolylidene - 21) - 2 - thio - 3 - ethyl - 4-ketotetrahydrothiazole and dimethyl sulphate, and the intermediate of (1); and by refluxing in acetic anhydride containing triethylamine (5) the reaction product of 5-(N1-methylbenzthiazolylidene - 21) - 2 - thio - 3 - ethyl - 4-ketotetrahydroxazole and dimethyl sulphate, and the intermediate of (1). Samples have been furnished under Sect. 2 (5) of dyes obtained by reacting together (1) 3-ethyl-5-(N1-methylbenzthiazolylidene - 21) - rhodanine, 2 - acetylmethylene - N - ethyl - 2 : 3 - dihydrobenzthiazole, and methyl p-toluene sulphonate; (2) the reaction product of 3-ethyl-5-(N1-ethylbenzthiazolylidene - 21) - D - butadienylidenerhodanine and dimethylsulphate, and 2-(b -methoxy : b - methylvinyl) - benzthiazole ethyl methylsulphate, and (3) the reaction product of 3-ethyl-5-(N1-methylquinolylidene-41)-rhodanine and dimethyl sulphate, and 2-(b -methoxy : b - methylvinyl) - benzthiazole ethyl methyl sulphate, the dye being precipitated in each case with aqueous KBr solution. Specification 633,824 is referred to.