Cyan dye forming coupler

Abstract

Abstract PURPOSE:To obtain a phenol type cyan dye forming coupler exhibiting superior color development sensitivity and high color development density without requiring addition of benzyl alcohol having a problem in environmental pollution. CONSTITUTION:The cyan dye forming coupler of this invention has general formulaeIand II in which R<1>, R<2> are H, alkyl, alkenyl, aryl, heterocyclic, cycloalkyl, acyl, or the like; R<3> is a ballasting group; and X is a group releasing upon reacting the oxidized product of a color developing agent. The compounds of formulaeI, II are obtained, for example, by reacting the compound of formula III with that of formula IV, catalytically reducing the resultant, and reacting it with an isocyanate compound. The cyan dye forming coupler of formulaeIand II are mixed with a silver halide emulsion and this emulsion is coated on a base, thus permitting a silver halide color photographic material superior in sensitivity and the like to be obtained.

Inventors

• 👤 Fumio Ishii
• 👤 文雄 石井
• 👤 Ryosuke Sato
• 👤 亮介 佐藤

Bibliographic Details