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. 21, 2006
Filed:
Oct. 02, 2002
Andrew John Blacker, Huddersfield, GB;
David Dodman, Huddersfield, GB;
David Anthony Jackson, Bury, GB;
Jan Michael Fielden, Huddersfield, GB;
John Heathcote Atherton, Huddersfield, GB;
Andrew John Blacker, Huddersfield, GB;
David Dodman, Huddersfield, GB;
David Anthony Jackson, Bury, GB;
Jan Michael Fielden, Huddersfield, GB;
John Heathcote Atherton, Huddersfield, GB;
Avecia Limited, Manchester, GB;
Abstract
A process for the preparation of a compound of formula (I): wherein Ar represents an optionally substituted aromatic carbocycle or heterocycle, and Rand Rindependently represent hydrogen, Calkyl, C(O)Calkyl or optionally substituted aryl provided that Rand Rare not both hydrogen which process comprises reacting together a compound of formula (II):Ar—X  (II)wherein Ar is as defined in relation to formula (I) and X represents a leaving group with a a compound of formula (III) wherein Rand Rare as defined in relation to formula (I) under aqueous conditions in the presence of a Pd (II) salt, a ligand and a Group I or Group II metal hydroxide base at a pH greater than 7. Compounds of formula (I) may be hydrolysed to the corresponding hydrazine.