Photographic recording material and non-diffusing compounds to be used in the material which contains a photographically active group which can be split off

US4381339A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Gunter Renner · Bensberg, DE
• Erich Wolff · Solingen, DE

Key dates

• Filing date: Apr 9, 1981
• Grant date: Apr 26, 1983
• Expiry date: Apr 9, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/159
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Novel non-diffusing reducible compounds of formula I which under alkaline development conditions release a diffusible photographically useful compound are of use in color diffusion transfer processes. ##STR1## R.sup.0 completes a ring system; E represents a reducible group; PA0 W reduces the electron density in the position of E so that E is reducible under photographic development conditions; PA0 GR.sup.1 represents a group from which photographically useful compound R.sup.1 is released; PA0 XR.sup.2 represents a group that by reduction of E is activated to cooperate with GR.sup.1 in an intramolecular reaction with release of R.sup.1.