SILVERHALIDE PHOTOGRAPHIC EMULSIONS AND DEVELOPERS CONTAINING CYCLIC KETOMETHYLENEAMIDE YELLOW-FORMING PHOTOGRAPHIC COUPLERS

摘要

1469078 Cyclic keto-methyleneamide colour couplers and intermediates therefor FUJI PHOTO FILM CO Ltd 14 Aug 1975 [14 Aug 1974] 33969/75 Heading C2C [Also in Division G2] Colour couplers of the formula wherein Q is an optionally substituted aliphatic group, an alicyclic group, an aromatic group or a heterocyclic group; Y is H or an optionally substituted aliphatic, alicyclic, aromatic or heterocyclic group; R is a divalent optionally substituted aliphatic, alicyclic, aromatic or heterocyclic group, and Z is -O-, -S- or is bearing an electron-attracting group; may be obtained by ring-closing with alkali a compound of the formula wherein X is halogen, which may itself be obtained by halogenating with a halogen or sulphuryl chloride a compound of the formula which may itself also be obtained by reacting a compound of the formula with an amino compound of the formula The couplers are useful in silver halide emulsions and in colour developer compositions. 3 - Amino - 4 - hydroxy - 4SP1/SP - decyloxy - diphenylsulphone is obtained by reduction of the corresponding nitro compound which is itself obtained by nitration of 4-hydroxy-4SP1/SP-decyloxydiphenylsulphone which is in turn obtained by reacting 4,4SP1/SP-dihydroxydiphenyl sulphone with decyl bromide. Dodecyl 3 - amino - 4 - hydroxybenzoate is obtained by reduction of the corresponding nitro compound which is itself otained by nitration of dodecyl 4-hydroxybenzoate.