Process for the preparation of 3-amino-5-methylpyrazole

US5616723A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• J urgen Muhr · Bornheim, DE
• Marcel Feld · Cologne, DE

Key dates

• Filing date: Mar 6, 1996
• Grant date: Apr 1, 1997
• Expiry date: Mar 6, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D231/38
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

3-Amino-5-methylpyrazole is prepared by reaction of cyanoacetone or an alkali metal salt thereof with hydrazine, a hydrazinium salt, or hydrazine hydrate.