[EN] 1-a-HALO-2,2-DIFLUORO-2-DEOXY-D-RIBOFURANOSE DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF<br/>[FR] DERIVES DE 1-?-HALO-2,2-DIFLUORO-2-DESOXY-D-RIBOFURANOSE ET PROCEDE DE PREPARATION DE CEUX-CI
申请人:HANMI PHARM IND CO LTD
公开号:WO2006011713A1
公开(公告)日:2006-02-02
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.
具有以下结构的1-α-卤代-2,2-二氟-2-脱氧-D-核糖呋喃糖衍生物(I),其中3-羟基基团被联苯基羰基基团保护,是一种固体,可以通过简单的程序如再结晶轻松纯化,因此,它可以有利地用作制备吉西他滨的中间体。此外,可以使用具有以下结构的化合物(V)作为中间体,高立体选择性地制备具有以下结构的1-α-卤代-2,2-二氟-2-脱氧-D-核糖呋喃糖衍生物(I)。