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. 24, 2005
Filed:
Aug. 31, 2001
Hitoshi Shimizu, Tokyo, JP;
Kaname Tsuzaki, Tokyo, JP;
Mitsuhiro Kurita, Tokyo, JP;
Chugai Seiyaku Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for preparing a fumarate salt of a compound represented by Formula (II):(wherein Rrepresents a hydrogen atom or a lower alkyl group, and Rrepresents a lower alkyl group), which comprises carbamating a compound represented by Formula (I):(wherein Rrepresents a hydrogen atom or a lower alkyl group), removing all carbamate groups from this compound, alkylating the nitrogen atom at the 3'-position of the desosamine ring in the resulting compound to give the compound represented by Formula (II), and converting this compound into a fumarate salt, wherein the compound represented by Formula (I) is carbamated in the presence of a cyclic ether or a carboxylic ester. This method enables efficient preparation of high-quality erythromycin derivatives.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile