Preparation process of indoles

Details Preparation process of indoles Preparation process of indoles

C - Chemistry, Metallurgy

07

D

260/319.7

C07D 209/08 (2006.01) B01J 23/90 (2006.01)

Patent

CA 1253507

- 21 - 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 actuation upon its reutilization.

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