发明名称 |
PROCESS FOR PREPARING RHEIN |
摘要 |
<p>Process for the preparation of rhein or diacerein comprising oxidising aloe-emodin with hydrogen peroxide or an alkali-metal peroxide oxidant in a basic reaction medium, optionally in the presence of an organic solvent, to obtain rhein. Optionally followed by acetylating the rhein thus obtained using an acetylating agent to obtain diacerein.</p> |
申请公布号 |
WO2009106908(A1) |
申请公布日期 |
2009.09.03 |
申请号 |
WO2008IB00447 |
申请日期 |
2008.02.29 |
申请人 |
LABORATOIRE MEDIDOM S.A.;DI NAPOLI, GUIDO;DI NAPOLI, ALESSANDRO |
发明人 |
DI NAPOLI, GUIDO;DI NAPOLI, ALESSANDRO |
分类号 |
C07C51/285;C07C65/40 |
主分类号 |
C07C51/285 |
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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