Yellow photographic color couplers containing 3-imino-1,3,4-thia

Details Yellow photographic color couplers containing 3-imino-1,3,4-thia Yellow photographic color couplers containing 3-imino-1,3,4-thia

1978-04-27

1980-10-21

Rollins, Alton D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

26023995, 546277, 548139, 548140, C07D28512, C07D40112, C07D40114, C07D40904

Patent

active

042295777

ABSTRACT:
Color photographic material is provided which contains at least one silver halide emulsion layer containing a yellow color coupler of the formula ##STR1## wherein G is the radical of a yellow coupler which is bonded to the heterocyclic ring by means of the active methylene group, Z is --CO-- or --SO.sub.2 --, M is hydrogen if Z is --CO--, or a substituent and R is hydrogen or a substituent.
The new two-equivalent yellow couplers lead due to their improved reactivity (high maximum density), minimal fog and high fastness to light and outstanding spectral properties of the dyestuffs formed therefrom to a color photographic material of advantageous properties.

REFERENCES:
patent: 2312040 (1943-02-01), Kendall et al.
patent: 2476525 (1949-07-01), Anish et al.
patent: 2672417 (1954-03-01), Jennen
patent: 3245788 (1966-04-01), Jaeken et al.
patent: 3874948 (1975-04-01), Kertel

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