Process for making chlorophosphines and thiophosphinic acid chlorides, and 9-chloro-9-thioxo-9-phosphabicyclononanes

US4752648A · kind A · utility

Inventors

• Norbert Weferling · Hürth, DE
• Werner Klose · Lechenich, DE

Key dates

• Filing date: Sep 18, 1986
• Grant date: Jun 21, 1988
• Expiry date: Sep 18, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Chlorophosphines or thiophosphinic acid chlorides of the general formulae RPCl.sub.2, R.sub.2 PCl or R.sub.2 P(.dbd.S)Cl are made from feed materials selected from hydrogen-functional primary or secondary phosphines or secondary phosphine sulfides, where R stands for identical or different, linear or branched, substituted or unsubstituted alkyl radicals having from 1-16 carbon atoms, aryl radicals, aralkyl radicals or alkylaryl radicals having from 6-9 carbon atoms or cycloalkyl radicals having from 5-10 carbon atoms. To this end, the feed materials are reacted with phosphorus pentachloride, or with chlorine gas in the presence of phosphorus trichloride at temperatures within the range -78.degree. to +145.degree. C. It is possible for two radicals R to be linked together by one or two substituted or unsubstituted hydrocarbon chains having from 1-4 carbon atoms.