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:
Jan. 01, 2002
Filed:
Apr. 13, 2000
Graham Ronald Eastham, Durham, GB;
Jamie Michael Thorpe, Cleveland, GB;
Robert Paul Tooze, Cleveland, GB;
Ineos Acrylics UK Limited, Hampshire, GB;
Abstract
A method of preparing a compound (I) of general formula (R —C) P—L —X—L —P—(C—R ) , in which R is independently a pendant, optionally substituted, organic group through which the group is linked to tertiary carbon atoms C; L and L are independently, a linking group selected from an optionally substituted lower alkylene chain connecting the respective phosphorous atom to the group X, and X is a bridging group comprising an optionally substituted aryl moiety to which the phosphorous atoms are linked on available adjacent carbon atoms; comprising: (i) reacting together a compound (II) of formula A—L —X—L —A, in which A is a halogen atom, with a metal M in a suitable solvent or form an intermediate compound (III) of formula: A—M—L —X—L —M—A; (ii) reacting said intermediate compound (III) with a compound (IV) of formula: (R —C) P—A , wherein A is a halogen atom which may be the same as or different from A, to form said compound (I).