2,4 Bis(2-indolyl-3)-4-oxobutanoic acids

Details 2,4 Bis(2-indolyl-3)-4-oxobutanoic acids 2,4 Bis(2-indolyl-3)-4-oxobutanoic acids

1980-07-07

1983-03-22

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20920

Patent

active

043776981

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(inodlyl)-substituted furanone.

REFERENCES:
Diels et al., Annalen der Chem. 490, pp. 277-294 (1931).

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