Preparation of high dye-yield couplers and intermediates useful therein

摘要

Disclosed is a carbamyl chloride of an aminoarylcarbonyl compound having the structural formula I:whereinR is an alkyl, alkenyl, or aryl group;A is an aryl (including heteroaryl) ring group;each R' is independently an alkyl group which may form a ring with Z or Z';p is 0, 1, 2, or 3;each Z, Z', and Y is independently hydrogen or a substituent; andn is 0, 1, or 2.