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. 18, 1976
Filed:
Oct. 09, 1974
Applicant:
Inventor:
Susumu Nakanishi, East Lyme, CT (US);
Assignee:
Pfizer Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ; 424270 ; 424271 ;
Abstract
A process for the synthesis of 6-(triphenylmethylamino)-2,2-dimethyl-3-(1-[arylmethyl]tetrazol-5-yl)penam s, intermediates useful in the preparation of antibiotic penams, which comprises contacting in a reaction-inert solvent a 6-(triphenylmethylamino)-2,2-dimethyl-3-(alkyl- or arylsulfonyloxy[N-(arylmethyl)imino]methyl)penam with one to three equivalents of hydrazoic acid or with an ammonium, sodium or lithium azide at a reaction temperature of 20.degree.-60.degree. C., in the presence of more than one equivalent of pyridine.