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:
Aug. 27, 2013
Filed:
Apr. 14, 2011
Denis Gribkov, Munchwilen, CH;
Remo Stohler, Monthey, CH;
Thomas Vettiger, Munchwilen, CH;
Michael Rommel, Munchwilen, CH;
Denis Gribkov, Munchwilen, CH;
Remo Stohler, Monthey, CH;
Thomas Vettiger, Munchwilen, CH;
Michael Rommel, Munchwilen, CH;
Syngenta Crop Protection LLC, Greensboro, NC (US);
Abstract
The invention relates to a process for the preparation of formula (I) which process comprises a) reacting a compound of formula (II), wherein X is chloro or bromo, with an organometallic species to (III), wherein X is chloro or bromo; reacting the halobenzyne with a fulvene (IV), to a compound of formula (V) wherein X is chloro or bromo; b) hydrogenating V in the presence of a suitable metal catalyst to a compound of formula (VI) wherein X is chloro or bromo; and either c1) reacting the compound of formula VI with NH3 in the presence of a catalyst comprising palladium and at least one ligand to the compound of formula (VII); and d) reacting the compound of formula VII in the presence of a base with a compound of formula (VIII), to the compound of formula I; or c2 reacting the compound of formula (VI) in the presence of a copper catalyst and a ligand with the compound of formula (VIIIa), to the compound of formula (I).