Production of butane tetracarboxylic acid derivative by means of coupled electrosynthesis

US6909016B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hermann Putter · Neustadt, DE
• Andreas Weiper-Idelmann · Waldsee, DE

Key dates

• Filing date: Nov 16, 2001
• Grant date: Jun 21, 2005
• Expiry date: Nov 16, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25B3/25
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing butanetetracarboxylic acid derivatives as product of value I by coupled electrosynthesis which comprises cathodically reducing a compound selected from the group consisting of maleic esters, maleic ester derivatives, fumaric esters and fumaric ester derivatives where at least one hydrogen atom in positions 2 and 3 may be replaced by inert groups and obtaining a product of value II at the node.