Patent Number: 6,252,117

Title: Preparation of phosphabenzene compounds

Abstract: Phosphabenzene compounds of the formulae I and II ##STR1## where R.sup.1 to R.sup.6 are identical or different and are, for example, hydrogen, are prepared by reacting corresponding pyrylium salts with PH.sub.3 in the presence or absence of a solvent or diluent. The pyrylium salts are combined with PH.sub.3 at above 0.degree. C. and reacted at a temperature in the range from 0.degree. C. to 200.degree. C. and a pressure above 1 bar without addition of an acid catalyst or a base.

Inventors: Mackewitz; Thomas (Mannheim, DE), Roper; Michael (Wachenheim, DE), Breit; Bernhard (Schriesheim, DE)

Assignee: BASF Aktiengesellschaft

International Classification: C07F 9/00 (20060101); C07F 9/6568 (20060101); C07F 009/50 ()

Expiration Date: 06/26/2018