发明名称 |
Process for purifying and isolating 2'-deoxy-2',2'-difluoronucleosides |
摘要 |
<p>A process to purify and isolate a beta-anomer enriched nucleoside comprising: a) providing a mixture containing R'' and a beta-anomer enriched nucleoside of the formula <CHEM> wherein each X is independently selected from hydroxy protecting groups and R' is a nucleobase of the formula <CHEM> where W is an amino protecting group; and R'' is a nucleobase of the formula <CHEM> where W' is an amino protecting group or hydrogen; in a high boiling solvent; b) diluting the mixture with an organic solvent from the group consisting of ethers, esters and nitriles; c) adding the diluted reaction mixture to aqueous acid; and d) holding the acid mixture so prepared at a temperature from 70 DEG C to 100 DEG C until the product of formula IB, where W is now W', has precipitated.</p> |
申请公布号 |
EP0712860(A2) |
申请公布日期 |
1996.05.22 |
申请号 |
EP19950308034 |
申请日期 |
1995.11.09 |
申请人 |
ELI LILLY AND COMPANY |
发明人 |
CHOU, TA-SEN;POTEET, LAURIE MICHELLE;KJELL, DOUGLAS PATTON |
分类号 |
C07H19/073;C07H19/04;C07H19/06;(IPC1-7):C07H19/073 |
主分类号 |
C07H19/073 |
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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