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:
Feb. 13, 1979
Filed:
Dec. 12, 1977
Applicant:
Inventors:
Renato Broggi, Milan, IT;
Marco Falciani, Milan, IT;
Assignee:
DOBFAR S.p.A., Milan, IT;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544 27 ; 544 28 ; 544 30 ;
Abstract
A process for preparing cephalosporines in which a cephalosporanic derivative is treated with a polar solvent, then with an organic base to give a mixture which is cooled at a temperature lower than -25.degree. C. A cyclic derivative of boron is added to the mixture and the temperature is increased to about 0.degree. C. An intermediate compound is formed which by treatment first with an acylating agent and then with a mixture of water and alcohol provides a solution containing cephalosporines.