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. 15, 2004
Filed:
Dec. 02, 2002
Rajendra Singh Bhakuni, Lucknow, IN;
Amit Tewari, Lucknow, IN;
Tarun Singh, Lucknow, IN;
Suman P. S. Khanuja, Lucknow, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
The present invention provides a method for the preparation of arteether from artemisinin in one pot in just about 4 hours comprising reduction of artemisinin into dihydroartemisinin by less quantity of sodium borohydride in ethanol at room temperature in the presence of a novel polyhydroxy catalyst, acylation of dihydroartemisinin in the presence of an acid catalyst, extraction of arteether from an aqueous reaction mixture using 1% ethyl acetate in n-hexane followed by workup and purification of the impure arteether to yield 80-86% (w/w) pure alpha, beta arteether.