Silver halide color photographic sensitive material
专利汇可以提供Silver halide color photographic sensitive material专利检索，专利查询，专利分析的服务。并且PURPOSE:To improve developed color by incorporating a specified pyrazoloazole type magenta coupler also in the basic nucleus of a specified pyrazoloazole type magenta coupler. CONSTITUTION:An aromatic sulfonamide group represented by A introduced as a substituent into the pyrazoloazole type magenta coupler is represented by formula 1 in which R1 is H or a substituent; X is a group to be released by the coupling reaction with the oxidation product of an aromatic primary amine color developing agent; each of Za, Zb, Zc is optionally substd. methine, =N-, -NH-, and one bond of Za-Zb and Zb-Zc is a double bond and the other is single, and it is a 5-membered N-contg. heterocyclic coupler condensed with another 5-membered ring, and the basic nucleus exhibits electronically equal aromaticity, and has a chemical structure generally called azapentalene. Preferable compds. among those of formula 1 are those of formulae 2, 4, and 5, thus permitting the obtained photographic sensitive material to be enhanced in sensitivity, gradation, color formation performance, and light stability of a color image to be formed, and further more enhanced in this light stability by use of a light fade inhibitorin combination with it.，下面是Silver halide color photographic sensitive material专利的具体信息内容。
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