发明申请
US20070238865A1 1-Alpha-Halo-2,2-Difluoro-2-Deoxy-D-Ribofuranose Derivatives and Process for the Preparation Thereof 失效
1-α-卤代-2,2-二氟-2-脱氧-D-呋喃核糖衍生物及其制备方法

1-Alpha-Halo-2,2-Difluoro-2-Deoxy-D-Ribofuranose Derivatives and Process for the Preparation Thereof
摘要:
1-α-halo-2,2-difluoro-2-deoxy-D-ribofuranose derivative of formula (I) having the 3-hydroxy group protected with a biphenylcarbonyl group is a solid which can be easily purified by a simple procedure such as recrystallization, and therefore, it can be advantageously used as an intermediate in the preparation of gemcitabine in a large scale. Further, the 1-α-halo-2,2-difluoro-2-deoxy-D-ribofuranose derivative of formula (I) can be prepared with high stereoselectivity using the compound of formula (V) as an intermediate.
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