Sulfonamido dye releasing compounds in photographic elements

Details Sulfonamido dye releasing compounds in photographic elements Sulfonamido dye releasing compounds in photographic elements

1977-04-25

1979-05-01

Schilling, Richard C.

Gas separation: apparatus

Magnetic separating means

And electric field separation apparatus

96 16, 96 21, 96 22, 96 29D, 96 51, 96 54, 96 566, 96 73, 96 74, 96 77, 96 99, 96100R, G03C 700, G03C 140, G03C 716, G03C 176

Patent

active

041521536

ABSTRACT:
A dye-releasing mechanism is described which employs a nondiffusible dye-releasing compound having a dye or dye-precursor moiety attached thereto through a sulfonamido cleavage linkage so that a diffusible sulfonamide dye or dye-precursor will be released upon oxidation and subsequent alkaline hydrolysis of the compound.

REFERENCES:
patent: 2306410 (1942-12-01), Schinzel
patent: 3443940 (1969-05-01), Bloom et al.
patent: 3698897 (1972-10-01), Gompf et al.
patent: 3734726 (1973-05-01), Figueras et al.
"N-Aryl Sulfonylquinonimines", Burmistrov et al., Zhurnal Obshchei Khimii, 22, 999 1952.
"The Indophenol . . . Amines", Titov et al., Zhurnal Obshchei Khimii, 30, 623 1960.

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