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:
Sep. 25, 2012
Filed:
Sep. 11, 2007
Keigo Tanaka, Tsukuba, JP;
Norio Murai, Tsukuba, JP;
Shuji Shirotori, Tsukuba, JP;
Satoshi Nagao, Tsukuba, JP;
Yuzo Watanabe, Tsukuba, JP;
Keigo Tanaka, Tsukuba, JP;
Norio Murai, Tsukuba, JP;
Shuji Shirotori, Tsukuba, JP;
Satoshi Nagao, Tsukuba, JP;
Yuzo Watanabe, Tsukuba, JP;
Eisai R&D Management Co., Ltd., Tokyo, JP;
Abstract
Provided is a fluoroboron compound which is highly safe and stable and is capable of forming a cyclic ether-fused ring by the intramolecular alkoxymethylation reaction, or a salt thereof. The compound can be synthesized by the intramolecular alkoxymethylation reaction of a fluoroboron compound represented by the formula (I) or a salt thereof in the presence of a metal catalyst. represents an aromatic ring; L represents a substituent such as a halogen atom; R represents a substituted or unsubstituted alkylene group having 1 or 2 carbon atoms; and M represents an alkali metal cation or the like, with the proviso that L and —R—OCHBFM are respectively located on contiguous carbon atoms on the aromatic ring, or in the case of a fused aromatic ring, on two carbon atoms adjacent to one carbon at the fused position).