Phthalide compounds, processes and marking systems

Details Phthalide compounds, processes and marking systems Phthalide compounds, processes and marking systems

1979-04-04

1981-02-17

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032613H, 260315, 26032629, C07D20712, C07D20724, C07D20932, C07D20918

Patent

active

042514460

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: 3491112 (1970-01-20), Lin

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