Alkane-bisalkyl-phosphinic anhydrides and process for the manufacture of alkane-phosphonic anhydrides and alkane-bis alkyl-phosphinic anhydrides

US4195035A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

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

Key dates

• Filing date: Mar 12, 1979
• Grant date: Mar 25, 1980
• Expiry date: Mar 12, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/657172
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Alkane-bisalkylphosphinic anhydrides consisting of repeating units of the formula ##STR1## and process for the manufacture of alkane-phosphonicanhydrides and alkane-bisalkyl-phosphonic anhydrides consisting of repeating units of the formula ##STR2## wherein alkane-phosphonic acids or alkane-bisalkyl-phosphinic acids of the formula ##STR3## are heated to 250.degree. to 450.degree. C. under reduced pressure while splitting off water.