C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
42/1, 260/306
C07D 405/00 (2006.01) B41M 5/025 (2006.01) B41M 5/145 (2006.01) C07D 207/333 (2006.01) C07D 209/00 (2006.01) C07D 209/12 (2006.01) C07D 209/86 (2006.01)
Patent
CA 1113474
ABSTRACT OF THE DISCLOSURE 3-(Aminophenyl- or indolyl-) 3-(indolyl-,pyrroly- or carbazolyl-)-phthalides, of the formula Image ...I prepared by interaction of the appropriate 2-(heteroaryl) carbonylbenzoic acid and the appropriate phenylamine, and 3,3-bis(indolyl)phthalides prepared by the interaction of the appropriate 2-(indolyl)carbonyl-benzoic acid and the appropriate indole, are useful as color formers in pressure- sensitive carbonless duplicating systems, thermal marking systems and hectographic copyingsystems.
296986
Crounse Nathan N.
Schmidt Paul J.
Smart & Biggar
Sterling Drug Inc.
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