4-(3-Indolyl)-2,3-dichloro-4-oxo-2-butenoic acids

Details 4-(3-Indolyl)-2,3-dichloro-4-oxo-2-butenoic acids 4-(3-Indolyl)-2,3-dichloro-4-oxo-2-butenoic acids

1982-07-06

1984-10-16

Rollins, Alton D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20918, C07D20924

Patent

active

044776764

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: 2712507 (1955-07-01), Green
patent: 2800457 (1957-07-01), Green et al.
patent: 3041289 (1962-06-01), Katchen et al.
patent: 3539375 (1970-11-01), Baum
patent: 3895173 (1975-07-01), Adachi
Rees and Sabet in the Journal of the Chemical Society, 687-691, (1965), [Chemical Abstracts 62: 6475h, (1965)].
Barrett, Beer, Dodd and Robertson in the Journal of the Chemical Society, 4810-4813, (1957), [Chem. Abstracts 52: 10053e, 1958].
Diels and Alder in Annalen Der Chemie 490: 277-294, (1931), [Chemical Abstracts 26: 438, (1932)].
Jackson and Naidoo in Journal Chemical Society, Perkins Transactions II; (5): 548-551, (1973), [Chemical Abstracts 78: 12439h, (1973)].

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