Process for the preparation of indigo compounds

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

Filed on

1989-03-16

Date issued

1990-10-30

Examiner

Springer, David B.

Patent Class

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

SubClass

Organic compounds

SubSubClass

Heterocyclic carbon compounds containing a hetero ring...

Other Related Categories

C07D40304

Type

Patent

Status

active

Patent number

049669770

Description

ABSTRACT:
A process for the preparation of an indigo compound by reacting an indole compound having no substituent at the 2- and 3-positions with hydrogen peroxide in a liquid phase composed of at least two separate phases including an organic phase containing the indole compound and an aqueous phase containing hydrogen peroxide, or by reacting the indole compound with hydrogen peroxide in solution in an organic solvent.

REFERENCES:
S. Coffey, ed., Rodd's Chemistry of Carbon Compounds, 2nd Ed., vol. IV, Part B, Heterocyclic Compounds, pp. 350-357.
Beilsteins Handbuch der Organischen Chemie, Sachregister fur die Bande 23-25, Index, pp. 281-284.

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