Bis(diorganophosphino)methanes

US5756847A · kind A · utility

Assignee

• BASF SE

Inventors

• Arthur Hohn · Tauberbischofsheim, DE
• Justin Wolf · Weikersheim, DE

Key dates

• Filing date: Jun 13, 1997
• Grant date: May 26, 1998
• Expiry date: Jun 13, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5068
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Preparation of methylene-bridged compounds of the formula I ##STR1## where R.sup.1 to R.sup.4 are identical or different and are each saturated C.sub.1 -C.sub.30 -hydrocarbyl, unsubstituted phenyl, phenyl substituted by substituents inert under the reaction conditions, or hydrogen, E.sup.1 and E.sup.2 are identical or different and are each phosphorus, arsenic or antimony, and X is a chemical bond or oxygen by reacting a tin compound of the general formula II EQU R.sub.3.sup.5 Sn--CH.sub.2 M II, where R.sup.5 is C.sub.1 -C.sub.20 -hydrocarbyl and M is an alkali metal, with a compound of the general formula III ##STR2## where Y is halogen, metallating the thus-obtained tin compound of the general formula IV ##STR3## with an alkali organometallic, and reacting the product with a compound of the general formula V ##STR4## to give a methylene-bridged compound of the formula I. And novel 45 bis(diorganophosphino)methanes.