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:
Jul. 04, 1989
Filed:
May. 04, 1987
Applicant:
Inventors:
Tadao Shibanuma, Saitama, JP;
Kohji Nakano, Saitama, JP;
Noriaki Nagano, Saitama, JP;
Yukiyasu Murakami, Saitama, JP;
Ryuichiro Hara, Tokyo, JP;
Akio Koda, Tokyo, JP;
Atsuki Yamazaki, Tokyo, JP;
Assignee:
Yamanouchi Pharmaceutical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; A61K / ;
U.S. Cl.
CPC ...
540224 ; 540225 ; 540222 ;
Abstract
Various 7-amino-3-substituted-methyl-3-cephem-4-carboxylic acids and lower alkylsily derivatives such as 7-amino-3-(2,3-cyclopenteno-1-pyridiniomethyl)-3-cephem-4 -carboxylic acid iodide and trimethylsilyl 7-trimethylsilylamino-3 -(5,6,7,8-tetrahydro-2-isoquinoliniomethyl)-3-cephem-4 -carboxylate iodide are valuable intermediates in the preparation of new and novel antibacterial agents. A new process for the preparation of these acids and the derivatives has been devised.