Process for the preparation of 5-fluoro-1H-pyrazoles

US9725415B2 · kind B2 · utility

Assignee

• BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

• Sergii Pazenok · Solingen, DE
• Norbert Lui · Odenthal, DE
• Christian Funke · Leichlingen, DE
• Arnd Neeff · Ennepetal, DE
• Vadim Mikhailovich Timoshenko · Horlivka, UA
• Elena Ivanovna Kaminskaya · Horlivka, UA
• Yuriy Grigorievich Shermolovich · Horlivka, UA

Key dates

• Filing date: Nov 25, 2014
• Grant date: Aug 8, 2017
• Expiry date: Nov 25, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D403/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A new process for the preparation of 5-fluoro-1H-pyrazoles of the general formula (I) as described herein, resulting from the reaction of an olefin with hydrazine in the presence of water and a base.