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. 19, 2008
Filed:
Nov. 03, 2005
Yasushi Matsumura, Ichihara, JP;
Nobuaki Mori, Ichihara, JP;
Yasuhiro Yamada, Ichihara, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
To provide a method for producing a 3-substituted 2-chloro-5-fluoro-pyridine or its salt in high yield from a readily available material through a short process under mild reaction conditions using a reagent which is easy for handling and simple in the reaction operation. Namely, a method for producing the following compound (2) or its salt which comprises selectively reducing a chlorine atom at the 6-position of the following compound (1) or its salt, is provided. Further, a method for producing the following compound (4) or its salt which comprises substituting a Zgroup of the following compound (2) or its salt obtained by the reduction reaction, by a Zgroup, is provided. Here, Zis —COR, etc., and Ris a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group or a cycloalkyl group. Zis a group different from Zand is —COR, etc., and Ris an alkyl group, an alkenyl group, an aryl group, an aralkyl group or a cycloalkyl group.