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. 16, 1987
Filed:
Sep. 26, 1984
Hiroshi Sadaki, Toyama, JP;
Hirokazu Narita, Toyama, JP;
Hiroyuki Imaizumi, Toyama, JP;
Yoshinori Konishi, Takaoka, JP;
Takihiro Inaba, Namerikawa, JP;
Tatsuo Hirakawa, Toyama, JP;
Hideo Taki, Sagamihara, JP;
Masaru Tai, Toyama, JP;
Yasuo Watanabe, Toyama, JP;
Isamu Saikawa, Toyama, JP;
Handi-Pac Inc., Hermann, MO (US);
Abstract
This invention relates to novel 7-(substituted or unsubstituted amino)-3-substituted methyl-.DELTA..sup.3 -cephem-4-carboxylic acids in which a substituted or unsubstituted 1,2,4-triazolyl or 2-(1,2,3,4-tetrazolyl) group attaches to the exomethylene group at the 3-position of the cephem ring through a carbon-nitrogen bond. These cephalosporins are useful intermediates for producing various novel cephalosporins. Also, this invention concerns a process for producing a compound represented by the formula: ##STR1## which comprises reacting a compound represented by the formula: ##STR2## with an optionally substituted triazole or tetrazole in the presence of an acid or a complex of the acid in an organic solvent at 0.degree. to 80.degree. C.