Process for producing 5-amino-3-methylpyrazole

摘要

PCT No. PCT/JP92/01233 Sec. 371 Date May 26, 1993 Sec. 102(e) Date May 26, 1993 PCT Filed Sep. 28, 1992 PCT Pub. No. WO93/06088 PCT Pub. Date Apr. 1, 1993.A process for producing 5-amino-3-methylpyrazole which comprises reacting hydrazine with a reaction intermediate containing at least one compound selected from the group consisting of 3-chloro-3-butenonitrile and 2,3-butadienenitrile, which intermediate is obtainable from 2,3-dichloropropene and hydrocyanic acid. A process for producing 5-amino-4-chloro-3-methylpyrazole which comprises chlorinating 5-amino-3-methylpyrazole obtainable by the above-mentioned reaction, in the presence of hydrochloric acid.