Process for the production of 2-equivalent yellow couplers

Details Process for the production of 2-equivalent yellow couplers Process for the production of 2-equivalent yellow couplers

C - Chemistry, Metallurgy

07

D

260/385, 260/551

C07D 239/88 (2006.01) C07D 253/08 (2006.01) G03C 7/305 (2006.01)

Patent

CA 1067086

A b s t r a c t A one-stage process for the production of a 2-equivalent acylacetamide yellow coupler, in which one hydrogen atom of the .alpha.-methylene group of the acyl acetamide coupler molecule is substituted by a group which is attached through an oxygen or nitrogen atom and which can be split off during chromogenic development with an oxidized color developer containing a primary aromatic amino group is provided, which process is carried out by reacting a 4-equivalent acylacetamide yellow coupler with a compound containing an aromatic hydroxyl group or an -NH- group in a heterocyclic ring in the presence of a hydrogen, or an agent which releases halogen on reaction and a basic condensation agent in a substantially aprotic solvent.

262985

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