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:
Jun. 09, 2015
Filed:
Feb. 26, 2013
Syngenta Participations Ag, Basel, CH;
Daniel Stierli, Stein, CH;
Harald Walter, Stein, CH;
Michael Rommel, Monthey SA, CH;
Reinhard Georg Hanreich, Munchwilen, CH;
Martin Zeller, Münchwilen, CH;
Thomas Vettiger, Münchwilen, CH;
Tomas Smejkal, Stein, CH;
Syngenta Participations AG, Basel, CH;
Abstract
The invention relates to a process for the preparation of a compound of formula (I), wherein R, Rand Rare as defined in claim, which process comprises a) adding a compound of formula (II), in the presence of an inert organic solvent to a mixture comprising an organic nitrite of formula (III) (R—O—N═O (III)), wherein Ris C-Calkyl, a compound of formula (IV), and an inert organic solvent; b) reacting the resulting compound of formula (V), with HN—O—CHto the compound of formula (VII), c) reducing the compound of formula (VII) to the compound of formula (VIII), d) and reacting the compound of formula VIII with a compound of formula (IX), in which R* is halogen, hydroxy or Calkoxy, to the compound of formula (I).