发明名称 |
Preparation of nucleosides ribofuranosyl pyrimidines |
摘要 |
The present process provides an improved method for the preparation of 4-amino-1-((2R,3R,4R,5R)-3-fluoro-4-hydroxy-5-hydroxymethyl-3-methyl-tetrahydrofuran-2-yl)-1H-pyrimidin-2-one of the formula (IV) which is a potent inhibitor of Hepatitis C Virus (HCV) NS5B polymerase.; |
申请公布号 |
US8912321(B2) |
申请公布日期 |
2014.12.16 |
申请号 |
US200712444608 |
申请日期 |
2007.10.05 |
申请人 |
Gilead Pharmasset LLC |
发明人 |
Axt Steven D.;Sarma Keshab;Vitale Justin;Zhu Jiang;Ross Bruce;Rachakonda Suguna;Jin Quingwu;Chun Byoung-Kwon |
分类号 |
C07H1/00;C07H3/00;C08B37/00;C07H5/02;C07H19/06 |
主分类号 |
C07H1/00 |
代理机构 |
|
代理人 |
O'Connor Cozen |
主权项 |
1. A process for the preparation of 4-amino-1-((2R,3R,4R,5R)-3-fluoro-4-hydroxy-5-hydroxymethyl-3-methyl-tetrahydro-furan-2-yl)-1H-pyrimidin-2-one of formula IV comprising a) transforming a compound of formula II wherein R is aryl or alkyl into a compound of formula III wherein R is aryl or alkyl, wherein the transformation comprises a reduction in the presence of a reducing agent and a subsequent chlorination in the presence of a chlorinating agent; b) converting the compound of formula III into a compound of formula I wherein R is aryl or alkyl and Bz is benzoyl, wherein the conversion comprises reacting the compound of formula III with O-trimethyl silyl-N4-benzoylcytosine in the presence of a Lewis acid; and c) hydrolyzing the compound of formula I to afford the 4-amino-1-((2R,3R,4R,5 5R)-3-fluoro-4-hydroxy-5-hydroxymethyl-3-methyl-tetrahydro-furan-2-yl)-1H-pyrimidin-2-one of formula IV, wherein the hydrolysis is performed in the presence of a base. |
地址 |
Foster City CA US |