摘要:
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.
摘要翻译:提供了制备2支支化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将受保护的前体3,4-O-异亚丙基-2-C取代的-MacLCAPS> D SMALLCAPS> - 阿拉蛋酸-1,5-内酯与氟化剂接触并将前体转化为 保护的2-脱氧-2-卤-2- C - 二取代的ribono-1,5-内酯,任选地加入到2-脱氧-2-卤代-2- C-二取代的核糖内-1,4-内酯中。