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. 07, 2017
Filed:
Oct. 08, 2015
Syngenta Participations Ag, Basel, CH;
Helmars Smits, Stein, CH;
Syngenta Participations, Basel, CH;
Abstract
The invention relates to a process for the preparation of a compound of formula I comprising a) reacting a compound of formula II in the presence of magnesium or an organometallic reagent of formula III RMX (III), wherein Ris C-Calkyl; Mis Li or Mg and X is halogen or absent; with a compound of formula IV CF—C(O)—R(IV), wherein Ris halogen, hydroxyl, C-Calkoxy, (di-C-Calkyl)amino, OC(O)CF, phenoxy or OM; wherein Mis Lithium, Magnesium, Sodium or Potassium; to a compound of formula V, and b) reacting the compound of formula V with alkali metal fluoride in the presence of catalytic amounts of a phase transfer catalyst in the presence of a polar solvent to the compound of formula I.