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:
Aug. 12, 2014
Filed:
Dec. 18, 2006
Alexander F. Zabudkin, Donetsk, UA;
Victor Matvienko, Donetsk, UA;
Aleksandr M. Itkin, San Diego, CA (US);
Alexey Matveev, Donetsk, UA;
Alexander F. Zabudkin, Donetsk, UA;
Victor Matvienko, Donetsk, UA;
Aleksandr M. Itkin, San Diego, CA (US);
Alexey Matveev, Donetsk, UA;
Solux Corporation, San Diego, CA (US);
Abstract
A method of preparing an anthracyclin such as epirubicin from a starting material comprising 13-dihydrodaunorubicine (13-daunorubicinol). The method comprises producing N-Trifluoroacetyl-13-daunorubicinol from 13-daunorubicinol by acylation. The N-Trifluoroacetyl-13-daunorubicinol is reacted with an aprotic solvent and an acylating agent to produce an intermediate sulfoxy salt which is treated with a strong base to produce 4'-keto-N-Trifluoroacetyldaunorubicin. The 4′-keto-N-Trifluoroacetyldaunorubicin is reacted with a reducing agent, such as borohydride of an alkaline metal, to produce N-Trifluoroacetyl-4′-epi-daunorubicin. The N-Trifluoroacetyl-4′-epi-daunorubicin is hydrolyzed in a basic solution to produce an intermediate compound. The intermediate compound is reacted with a halogenizing agent to produce a 14-Hal-derivative. The 14-Hal derivative is hydrolized in the presence of a formate of an alkaline metal to produce the desired final compound.