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. 03, 2012
Filed:
Oct. 08, 2007
Applicants:
Beat Jau, Muenchwilen, CH;
Colin Ellis, Hull, GB;
Linhua Wang, Huddersfield, GB;
Inventors:
Assignee:
Syngenta Crop Protection LLC, Greensboro, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/00 (2006.01); C07C 22/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a process for the production of compounds of formula (I) wherein X is fluoro, chloro, bromo or iodo and n is 1, 2, 3 or 4, which process comprises reacting a compound of formula (II) wherein the substituents are as defined for formula (I), with inorganic nitrite in an acidic aqueous medium in the presence of bromide and a copper catalyst and wherein the process is carried out as a one-pot reaction.