Preparation process indoles

Details Preparation process indoles Preparation process indoles

1987-11-02

1989-05-16

Ceperley, Mary E.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20908

Patent

active

048311588

ABSTRACT:
In a process for preparing an indole by reacting an aniline with a diol, a catalyst the activity of which has been reduced through its use in the reaction is brought into contact with an inert gas containing 5 vol. % or less of oxygen so that the catalyst is regenerated for its repeated utilization. The activity of the regenerated catalyst is enhanced further when it is subjected to a reducing treatment for activation upon its reutilization.

REFERENCES:
patent: 4159271 (1979-06-01), Sano
patent: 4456760 (1984-06-01), Matsuda et al.
patent: 4476310 (1984-10-01), Honda et al.
Ube Industries, Derwent and Japio Abstracts of Japanese Patent Application Laid Open No. J58133833, published Aug. 9, 1983.
Patent Abstracts of Japan, vol. 7, No. 248, (Nov. 4, 1983), p. 13C 193, (Oodan).

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