Process for preparing a synthetic intermediate for preparation of branched nucleosides
申请人:Mayes Alexander Benjamin
公开号:US20070203334A1
公开(公告)日:2007-08-30
A process is provided for the preparation of a key intermediate in the preparation of 2′-branched nucleoside compounds. The process includes contacting a protected precursor 3,4-O-isopropylidene-2-C-substituted-
D
-arabinono-1,5-lactone with a fluorinating agent under anhydrous conditions and converting the precursor into a protected 2-deoxy-2-halo-2-C-disubstituted ribono-1,5-lactone and optionally into a 2-deoxy-2-halo-2-C-disubstituted ribono-1,4-lactone.
提供一种制备2'-支链核苷化合物的关键中间体的方法。该方法包括在无水条件下用氟化试剂接触保护前体3,4-O-异丙基亚甲基-2-C-取代-D-阿拉伯糖酮-1,5-内酯,并将前体转化为保护的2-去氧-2-卤代-2-C-双取代核糖酮-1,5-内酯和可选地转化为2-去氧-2-卤代-2-C-双取代核糖酮-1,4-内酯。