Patent number: 6265600
Abstract: The invention provides novel photographic compositions comprising a propene isomer of the formula
wherein A B or E, each individually represent hydrogen, or an electron withdrawing group, selected for example from —CN, —NO2, —SO2R, —SO2NH—, —CO2R, —COR, —CONHR, —CONHAr, —CF3 halogen, amino, aryl, aralkyl, alkyl, cycloalkyl, alkyl (carbonyl)oxy, aryl (carbonyl)oxy, carboxy, alkoxycarbonyl, aryloxycarbonyl, carbamomyl, acyl, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonylamino, acylamino, ureido, alkylsulphonylamino, arylsulphonylamino, sulphamoylamino, alkylsulphonyl, arylsulphonyl, sulphamoyl, imido, alkylthio, arylthio and heterocycles; the invention also provides a propene isomer of the formula I
wherein D represents a group of the formula Ar—L— wherein Ar is a phenyl group optionally substituted with one or more substituents, and —L— is a linking group incorporating a lone pair of electrons; and A,
Type:
Grant
Filed:
July 30, 1993
Date of Patent:
July 24, 2001
Assignee:
Eastman Kodak Company
Inventor:
Hugh Martin Williamson