2-Equivalent yellow couplers

Details 2-Equivalent yellow couplers 2-Equivalent yellow couplers

1977-03-14

1979-02-06

Schilling, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

260558P, 260562K, C07C10320, C07C 9716, C07C10374, C07D25308

Patent

active

041385578

ABSTRACT:
2-Equivalent yellow couplers for the production of yellow dye images in color photographic silver halide materials have as splittable group a nitrogen-containing 6-membered heteroaromatic ring which is linked by the said nitrogen atom to the coupling position of the coupler molecule, contains a carbonyl group adjacent said nitrogen, and also contains one or two additional nitrogens as well as a fused-on aromatic carbocyclic ring. When the heteroaromatic ring contains two additional nitrogens, all three nitrogens are vicinal; when it contains only one additional nitrogen, the splittable group is a 1,3-quinazolinone-4 having at least one carboxy, lower-aliphatic-alcohols-esterified carboxy, nitro, methyl or chloro substituent.

REFERENCES:
patent: 3900483 (1975-08-01), Fujimatsu et al.

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