Process for the preparation of ethane-1,2-diphosphinic acid diesters

US3939050A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hans-Jerg Kleiner · Kronberg, DE
• Sigurd Rosinger

Key dates

• Filing date: Jan 17, 1974
• Grant date: Feb 17, 1976
• Expiry date: Jan 17, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/3235
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of ethane-1,2-diphosphinic acid diesters of the formula ##EQU1## where R.sub.1 represents alkyl, phenyl and/or phenalkyl groups having from 1 to 18 carbon atoms and R.sub.2 alkyl groups having from 1 to 18 carbon atoms, which may be optionally substituted by halogen atoms, which comprises reacting phosphonous acid esters of the formula ##EQU2## where R.sub.1 and R.sub.2 are as defined above, with acetylene using high-energy irradiation.