Process of producing n-acylaminomethane phosphonic acids

US4261929A · kind A · utility

Assignee

• Benckiser-Knapsack GmbH · DE

Inventors

• Klaus Sommer · Heidelberg, DE
• Guenter Raab · Hemsbach, DE

Key dates

• Filing date: Jun 19, 1979
• Grant date: Apr 14, 1981
• Expiry date: Jun 19, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/3808
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention is concerned with the novel and highly advantageous process of producing N-acylaminomethanephosphonic acid in a one-step process by reacting a acylonitrile with formaldehyde or a formaldehyde-yielding compound and phosphorous acid in the presence or absence of the solvent at an elevated temperature, preferably at a temperature between about 60.degree. C. and the boiling point of the mixture. The reaction may be carried with or without a polar aprotic solvent and/or an acidic catalyst.