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:
Jun. 07, 2005
Filed:
Jul. 30, 2003
Shuzhong Wang, Kanagawa, JP;
Kazuhiko Hayashi, Kanagawa, JP;
Shinsuke Kaga, Kanagawa, JP;
Kazuya Oharu, Kanagawa, JP;
Shuzhong Wang, Kanagawa, JP;
Kazuhiko Hayashi, Kanagawa, JP;
Shinsuke Kaga, Kanagawa, JP;
Kazuya Oharu, Kanagawa, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
It is to provide a process for synthesizing an intended fluorine-containing compound having a geminal difluoro structure with a high yield, by subjecting a carbonyl compound which is readily available to a two-stage reaction. A compound (1) such as ethyl 4-oxocyclohexanecarboxylate is reacted with a compound of the formula X-Z or a compound of the formula ZO (wherein Z is a monovalent group which gives a leaving group of the structure —OZ, and X is a chlorine atom, a bromine atom or an iodine atom) such as phosphorus pentachloride, and then a fluorinating agent which generates fluorine anions such as HF is acted thereon to obtain a fluorine-containing compound (2) such as ethyl 4,4-difluorocyclohexanecarboxylate