[EN] 1-a-HALO-2,2-DIFLUORO-2-DEOXY-D-RIBOFURANOSE DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF [FR] DERIVES DE 1-?-HALO-2,2-DIFLUORO-2-DESOXY-D-RIBOFURANOSE ET PROCEDE DE PREPARATION DE CEUX-CI
1-Alpha-Halo-2,2-Difluoro-2-Deoxy-D-Ribofuranose Derivatives and Process for the Preparation Thereof
申请人:Lee Jaeheon
公开号:US20070238865A1
公开(公告)日:2007-10-11
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.