C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
260/306.1
C09B 7/02 (2006.01)
Patent
CA 2000990
A process is provided herein for the preparation of an indigo compound. The process includes 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 by reacting with heating over 60°C in the presence of an aprotic solvent.
Aoki Shinobu
Hara Isao
Takaki Usaji
Yamamoto Yoshihiro
Marcus & Associates
Mitsui Toatsu Chemicals Inc.
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