Process for manufacturing 5-chloromethyl-2,3-pyridine dicarboxylic acid anhydrides

US9278977B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Frederik Menges · Schriesheim, DE
• Joachim Gebhardt · Monsheim, DE
• Michael Rack · Eppelheim, DE
• Michael Keil · Freinsheim, DE
• Rodney F. Klima · Morrow, US
• David A. Cortes · Fairless Hills, US
• Robert Leicht · Hannibal, US
• Helmut Zech · Bad Dürkheim, DE
• Jochen Schroeder · Lambsheim, DE

Key dates

• Filing date: Mar 20, 2014
• Grant date: Mar 8, 2016
• Expiry date: Mar 20, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D405/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for manufacturing 5-chloromethyl-2,3-pyridine dicarboxylic acid anhydrides (I) Compounds (I) are useful intermediates in the synthesis of herbicidal imidazolinones.