Title:
PRODUCTION OF INDIGO
Document Type and Number:
Japanese Patent JPH0543807
Kind Code:
A
Abstract:
PURPOSE: To heighten the yield of indigo in the production thereof by the reaction of an indole derivative having no substituent at the 2- and 3-positions with an organic hydroperoxide.
CONSTITUTION: An indole derivative having no substituent at the 2- and 3- positions is reacted with an organic hydroperoxicle using, as a catalyst, a compound of a metal selected from those of Groups IV, V, and VI of the periodic table in a reaction medium comprising a hydrocarbon solvent and a secondary or tertiary alcohol solvent in a weight ratio of 2.0 or less.
Inventors:
TAKAGI USAJI
INOUE YOSHIHISA
YAMAMOTO YOSHIHIRO
AOKI SHINOBU
HARA RETSU
INOUE YOSHIHISA
YAMAMOTO YOSHIHIRO
AOKI SHINOBU
HARA RETSU
Application Number:
JP20049791A
Publication Date:
February 23, 1993
Filing Date:
August 09, 1991
Export Citation:
Assignee:
MITSUI TOATSU CHEMICALS
International Classes:
B01J21/06; B01J23/28; B01J31/12; C07B61/00; C07D209/36; C09B7/00; (IPC1-7): B01J21/06; B01J23/28; B01J31/12; C07B61/00; C07D209/36; C09B7/00
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