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. 25, 2015
Filed:
Sep. 28, 2009
Denis Gribkov, Munchwilen, CH;
Bjorn Antelmann, Munchwilen, CH;
Fanny Giordano, Basel, CH;
Harald Walter, Stein, CH;
Alain DE Mesmaeker, Stein, CH;
Denis Gribkov, Munchwilen, CH;
Bjorn Antelmann, Munchwilen, CH;
Fanny Giordano, Basel, CH;
Harald Walter, Stein, CH;
Alain De Mesmaeker, Stein, CH;
Syngenta Crop Protection, LLC, Greensboro, NC (US);
Abstract
The present invention relates to a novel a process for the preparation of 9-dichloromethylene-1,2,3,4-tetrahydro-1,4-methano-naphthalen-5-ylamine which process comprises a) reacting cyclopentadiene in the presence of a radical initiator and CXCI, wherein X is chloro or bromo, to a compound of formula I1, or aa) reacting cyclopentadiene with CXCI, wherein X is chloro, in the presence of a metal catalyst to a compound of formula I1, wherein X is chloro, b) reacting the compound of formula I1 with a base in the presence of an appropriate solvent to the compound of formula III, c) and converting the compound of formula III in the presence of 1,2-dehydro-6-nitrobenzene to the compound of formula IV, and d) hydrogenating the compound of formula IV in the presence of a metal catalyst.