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:
Apr. 29, 2008
Filed:
Mar. 20, 2003
Ram Pratap, Lucknow, IN;
Dharmendra Pratap Singh, Lucknow, IN;
Raghavendra Pal, Lucknow, IN;
Satyawan Singh, Lucknow, IN;
Ram Pratap, Lucknow, IN;
Dharmendra Pratap Singh, Lucknow, IN;
Raghavendra Pal, Lucknow, IN;
Satyawan Singh, Lucknow, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
The present invention provides an improved process for the preparation of Guggulsterones which comprises epoxidising 16-dihydropegnenolone acetate (16 DPA) by reacting 16DPA with hydrogen peroxide reagent adduct in the presence of a co-base in a polar solvent to obtain 3 β hydroxy-16 α, 17-oxido-5 pregnen-20-one, converting the 3 β hydroxy-16α, 17-oxido-5-pregnen-20-one by reacting with hydrazine in the presence of a strong base at refluxing temperature followed by oxidation to obtain desired guggulsterones viz. to 5, 17-(20)-cis and trans pregnadiene-3 β, 16-diol of the formula Ia and Ib.