Preparation of pyrazole and its derivatives

C - Chemistry – Metallurgy – 07 – D

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260/315.3

C07D 231/12 (2006.01)

Patent

CA 2018206

Pyrazole and its derivatives are prepared by dehydrogenating 2-pyrazoline or its derivatives by a process in which the reaction is carried out using sulfuric acid in the presence of iodine or of an iodine compound at from 50 to 250°C.

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