5-acylamino-2-arylazo, nitro, or nitroso-4-substituted-phenol compounds and method of using them
申请人:Eastman Kodak Company
公开号:US06476202B1
公开(公告)日:2002-11-05
Disclosed is a 5-acylamino-2-arylazo, nitro, or nitroso-4-substituted-phenol having the structural formula I:
wherein:
R* is an arylazo, nitro, or nitroso group,
Y is a coupling-off group, and
R′ is a substituent group.
Also disclosed is a method of using the compound in a simplified process for making a photographic coupler.