Process for the preparation of vinylphosphonic acid diesters and vinylphosphonic acid

US4493803A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Jerg Kleiner · Kronberg, DE
• Walter Dursch · Königstein, DE

Key dates

• Filing date: Jun 24, 1983
• Grant date: Jan 15, 1985
• Expiry date: Jun 24, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/4015
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for making a vinylphosphonic acid diester of the formula EQU CH.sub.2 .dbd.CH--P(O)(OR).sub.2 by heating a dialkyl 2-acetoxyethane phosphonate of the formula EQU CH.sub.3 COOCH.sub.2 CH.sub.2 P(O)(OR).sub.2 in the presence of an acidic or basic catalyst and reacting the resulting product with an orthoester of the formula EQU R.sup.1 C(OR).sub.3.