Uracil derivatives

Details Uracil derivatives Uracil derivatives

C - Chemistry, Metallurgy

07

D

96/135, 260/258,

C07D 403/12 (2006.01) C07D 239/38 (2006.01) C07D 413/12 (2006.01) C07D 413/14 (2006.01) C07D 417/12 (2006.01) C07D 421/12 (2006.01) C07D 473/38 (2006.01) G03C 1/42 (2006.01) G03C 7/392 (2006.01) G03C 8/00 (2006.01)

Patent

CA 1166251

ABSTRACT OF THE DISCLOSURE There are described novel compounds which are represented by the formula Image wherein R is Image or Image ; A is sulfur or selenium; X repre- sents the nonmetallic atoms necessary to form a nucleus which completes a five or six membered heterocyclic moiety; R1 is H or lower alkyl; R2 is H or a hydrolyzable group; and R3 is H, alkyl or a hydrolyzable group. The compounds are useful in photographic applications and provide controlled release of a photographically useful material during processing of photographic elements with an aqueous alkaline processing composition.

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