Bis phenyl (2 carboxylic acid or ester indol-3-yl)methanes

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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548469, 548511, C07D20942

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active

045581371

ABSTRACT:
The invention provides processes for the preparation of both known and novel [bis(substituted-aryl) (indolyl)]methanes and [(substituted-aryl) (heteryl) (indolyl)]methanes, useful as color formers, particularly in carbonless duplicating and thermal marking systems, which comprises the interaction of [bis(substituted-aryl) (phenylsulfonyl)]methanes and [(substituted-aryl) (heteryl) (phenylsulfonyl)]methanes with indoles in the presence of either an alkaline or an acidic catalyst.

REFERENCES:
patent: 3637748 (1972-01-01), Psaar et al.
patent: 3642823 (1972-02-01), Raue et al.
patent: 3995088 (1976-11-01), Garner et al.
patent: 4654718 (1977-10-01), Garner et al.
Psaar, H. et al., "Basic Dyes", Chemical Abstracts 82:74463t (1975).
Whitehead and Whitesilt, Journal of Medicinal Chemistry 1974, vol. 17, No. 12, 1298-1304 (1974).

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