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:
May. 22, 2018
Filed:
Oct. 08, 2015
Applicant:
Syngenta Participations Ag, Basel, CH;
Inventor:
Helmars Smits, Stein, CH;
Assignee:
Syngenta Participations AG, Basel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/04 (2006.01); C07C 17/06 (2006.01); C07C 17/12 (2006.01); C07C 17/35 (2006.01); C07C 17/358 (2006.01); C07C 25/10 (2006.01);
U.S. Cl.
CPC ...
C07C 17/04 (2013.01); C07C 17/06 (2013.01); C07C 17/12 (2013.01); C07C 17/35 (2013.01); C07C 17/358 (2013.01); C07C 25/10 (2013.01);
Abstract
The present invention relates to a process for the preparation of a compound of formula I (I), comprising reacting a compound of formula II (II), with a brominating agent in the presence of an acidic catalyst to a compound of formula III (III), and reacting the compound of formula III in tetrahydrofuran or 2-methyl-tetrahydrofuran with potassium tert-butoxide to a compound of formula I.