Patent · US Expired

Preparation of phosphabenzene compounds

US6252117A · kind A · utility

2Cited by

0References

8Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Mackewitz · Mannheim, DE
Michael Roper · Monsheim, DE
Bernhard Breit · Gundelfingen, DE

Key dates

Filing date	Mar 14, 2000
Grant date	Jun 26, 2001
Priority date	—
Expiry date	Mar 14, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/6568
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.