3,5-Bis (indolyl)-5-(indolyl)-2(5H)-furanones

Details 3,5-Bis (indolyl)-5-(indolyl)-2(5H)-furanones 3,5-Bis (indolyl)-5-(indolyl)-2(5H)-furanones

1976-01-22

1978-02-21

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

106 145, 106 21, 106 22, 26032613R, 427151, C07D20918, C07D20920

Patent

active

040752240

ABSTRACT:
Mono-, bis- and tris-indolyl-substituted furanones useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared respectively by: the interaction of an indole with mucochloric acid; the interaction of an indole with a 4-mono(indolyl)-substituted 4-oxo-2-butenoic acid; and by the interaction of an indole with a 2,4-bis(indolyl)-substituted 4-oxobutanoic acid or with a 3,5-bis(indolyl)-substituted furanone.

REFERENCES:
patent: 3509174 (1970-04-01), Lin
patent: 3812146 (1974-05-01), Farber et al.

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