The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
Nov. 15, 2000
Stephen Benedict David Winter, Cambridge, GB;
Ian Campbell Lennon, Cambridge, GB;
Chirotech Technology, Ltd., , GB;
Abstract
The present invention pertains to a process for the preparation of an arylphosphine of the formula R,OC—Ar—PR,R,wherein Ar is aryl or heteroaryl; R,is an alkoxy or amine group; and R,and R,are each any organic group; and each of the respective groups may optionally be substituted with any non-interfering group; which comprises the reaction of a sulfonyloxy compound of the formula R,OC—Ar—OSO,R,wherein R,is alkyl, haloalkyl, perhaloalkyl, aryl, aralkyl or alkaryl, with a phosphine of the formula HPR,R,, in a solvent and in the presence of a palladium catalyst and a base. The arylphosphine can then readily be converted to a chiral phosphine ligand.