2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids

Details 2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids 2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids

1980-03-14

1982-09-28

Springer, David B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032613A, 2603265B, 26032613H, 562433, 282 275, C07D20924

Patent

active

043517684

ABSTRACT:
3-Aryl-3-indolylphthalides, 3-aryl-3-pyrrolylphthalides and 3-aryl-3-carbazolylphthalides 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)carbonylbenzoic acid and the appropriate indole are useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems.

REFERENCES:
patent: 3779753 (1973-12-01), Bloom et al.
patent: 3829322 (1974-08-01), Ozutsumi et al.
patent: 3837889 (1974-09-01), Hughes et al.

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