发明名称 |
SINGLE POT CONVERSION OF ARTEMISININ INTO ARTEETHER |
摘要 |
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.
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申请公布号 |
US2004106809(A1) |
申请公布日期 |
2004.06.03 |
申请号 |
US20020308651 |
申请日期 |
2002.12.02 |
申请人 |
BHAKUNI RAJENDRA SINGH;TEWARI AMIT;SINGH TARUN;KHANUJA SUMAN P.S. |
发明人 |
BHAKUNI RAJENDRA SINGH;TEWARI AMIT;SINGH TARUN;KHANUJA SUMAN P.S. |
分类号 |
C07D493/20;(IPC1-7):C07D307/56 |
主分类号 |
C07D493/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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