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. 07, 2018
Filed:
Oct. 07, 2015
Syngenta Participations Ag, Basel, CH;
Denis Gribkov, Stein, CH;
SYNGENTA PARTICIPATIONS AG, Basel, CH;
Abstract
A process for the preparation of a compound of formula (I) wherein Ris hydrogen, fluoro or chloro; which process comprises: a) reacting a compound of formula (II) wherein Ris hydrogen, fluoro or chloro; with a nitration agent to the compound of formula (III) wherein Ris hydrogen, fluoro or chloro; b) reacting the compound of formula (III) with trichloroisocyanuric acid in the presence of sulfuric acid or fuming sulfuric acid to the compound of formula (IV) wherein R1 is hydrogen, fluoro or chloro; and c) reacting the compound of formula (III) with chlorine gas at a temperature from 180° C. to 250° C. to the compound of formula (I).