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:
Nov. 23, 1982
Filed:
Sep. 02, 1981
Applicant:
Inventor:
Robert J Sysko, Niantic, CT (US);
Assignee:
Pfizer Inc., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 424270 ; 424271 ; 2602391 ;
Abstract
An improved process for making 6,6-diiodopenicillanic acid, an intermediate for preparation of 6-beta-iodopenicillanic acid, a beta-lactamase inhibitor, which comprises diazotizing 6-beta-aminopenicillanic acid in the presence of iodine, followed by washing the product of said process with an aqueous solution of an alkali metal iodide.