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. 21, 2010
Filed:
Jan. 07, 2008
Masahiko Seki, Kyoto, JP;
Toshiaki Shimizu, Osaka, JP;
Shin-ichi Yoshida, Hyogo, JP;
Masanori Hatsuda, Shiga, JP;
Masahiko Seki, Kyoto, JP;
Toshiaki Shimizu, Osaka, JP;
Shin-ichi Yoshida, Hyogo, JP;
Masanori Hatsuda, Shiga, JP;
Tanabe Seiyaku Co., Ltd., Osaka, JP;
Abstract
The present invention is to provide a process for preparing a synthetic intermediate of biotin which is industrially advantageous, and discloses a process for preparing a compound represented by the formula (I): 1 wherein Rand Rmay be the same or different from each other, and each represents hydrogen atom, a benzyl group which may have a substituent(s) on the benzene ring, a benzhydryl group which may have a substituent(s) on the benzen ring, or a trityl group which may have a substituent(s) on the benzene ring, Rrepresents cyano group, carboxyl group, an alkoxycarbonyl group, an alkylthiocarbonyl group, or a carbamoyl group which may have a substituent, or a salt thereof which comprises subjecting a compound represented by the formula (II-a): 2 wherein the symbols have the same meanings as defined above, or a salt thereof to ring transformation.