Carbazole containing phthalides

Details Carbazole containing phthalides Carbazole containing phthalides

1977-08-04

1980-01-08

Rotman, Alan L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032613H, 26032634, 427151, C07D40504

Patent

active

041827147

ABSTRACT:
3-Heteroaryl-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems are prepared by reacting 2-(heteroarylcarbonyl)-benzoic acids with diphenylamines.

REFERENCES:
patent: 2712507 (1955-07-01), Green
patent: 2800457 (1957-07-01), Green et al.
patent: 3041289 (1962-06-01), Katchen et al.
patent: 3491112 (1970-01-01), Lin
patent: 3736168 (1973-05-01), Ozutsumi et al.

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