Method for the preparation of perfluoroalkyl containing pyrazoles carboxylates

US9617220B2 · kind B2 · utility

Assignee

• BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

• Sergii Pazenok · Solingen, DE
• Winfried Etzel · Leichlingen, DE
• Norbert Lui · Odenthal, DE
• Arnd Neeff · Ennepetal, DE

Key dates

• Filing date: Aug 2, 2013
• Grant date: Apr 11, 2017
• Expiry date: Aug 2, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/343
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention pertains to a novel process for the preparation of Fluoroalkylpyrazole- or Bisperfluoroalkypyrazole carboxylates comprising a cyclization of Perfluoroalkyl ketoesters with hydrazines.