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. 08, 1976
Filed:
Sep. 24, 1974
Applicant:
Inventor:
Gino Cotti, Monza (Milan), IT;
Assignee:
Ankerfarm, S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
The invention relates to the preparation of 6-demethyl-6-deoxy-6-methylene-tetracycline by means of reductive dehalogenation of the corresponding 11a-halo-6-demethyl-6-deoxy-6-methylene-tetracycline, the reaction being carried out in presence of the stoichiometric quantity of a tertiary phosphine, arsine or stibine and in a polar solvent. The time and temperature of the reaction are controlled within specified limits to obtain a complete conversion.