Substituted 1-phenyl-3-pyrazolidinone electron transfer agents

Details Substituted 1-phenyl-3-pyrazolidinone electron transfer agents Substituted 1-phenyl-3-pyrazolidinone electron transfer agents

G - Physics

03

C

96/136, 96/26, 9

G03C 7/00 (2006.01) C07D 231/08 (2006.01) G03C 1/40 (2006.01) G03C 1/76 (2006.01) G03C 5/30 (2006.01) G03C 5/305 (2006.01) G03C 7/392 (2006.01) G03C 7/413 (2006.01) G03C 8/08 (2006.01) G03C 8/36 (2006.01)

Patent

CA 1119872

SUBSTITUTED l-PHENYL-3-PYRAZOLIDINONE ELECTRON TRANSFER AGENTS ABSTRACT OF THE DISCLOSURE Photographlc elements, film units, processes and alkaline processing compositions are described wherein certain substituted 1-phenyl-3-pyrazolidinones are employed as electron transfer agents in color image transfer materials. The silver halide electron transfer agents or precursors thereor have the following formula: Image wherein: R is hydrogen or a hydrolyzable moiety; R1 is hydrogen or a hydroxy group; R2, R3 and R4 each represent hydrogen, hydroxy, an alkyl group or 1 to 3 carbon atoms, an alkoxy group of 1 to 3 carbon atoms, a phenyl group, -NHS02R5, -0(CH2)nOR6, -(CH2)nOR6, -O(CH2)nC6Hs, -(CH2)nR7, or -0(CH2)nR7; R5 is hydrogen or an alkyl group of 1 to 3 carbon atoms; R6 is hydrogen or a methyl group; R7 is NHS02R5 or S02NHR5; and n is a positive integer of 1 to 2; with the proviso that at least one or R2, R3 and R4 must be one of the groups other than hydrogen.

335340

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