Process for the preparation of indigo compounds

Details Process for the preparation of indigo compounds Process for the preparation of indigo compounds

1989-10-25

1992-05-12

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548455, 548454, C07D40304

Patent

active

051129876

ABSTRACT:
A process for the preparation of an indigo compound which comprises reacting a corresponding indole compound having no substituent at the 2- and 3-positions with a percarboxylic acid in the presence of an alcohol solvent, or with heating over 60.degree. C. in the presence of an aprotic solvent.

REFERENCES:
Witkof et al., Jr. Am. Chem. Soc., 73, 713 (1951).
Witkof, Ann., 558, 98 (1947).

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