Synthesis of 2-fluoro-substituted and 2,6-modified purine 2′,3′-dideoxy-2′,3′-difluoro-d-arabinofuranosyl nucleosides from d-xylose
作者:Grigorii G. Sivets、Franck Amblard、Raymond F. Schinazi
DOI:10.1016/j.tet.2019.02.027
日期:2019.3
purine-modified 2′,3′-dideoxy-2′,3′-difluro-D-arabinonucleosides, including fluorinated analogs of fludarabine and nelarabine, have been prepared via anion glycosylation reactions of salts of 2-fluoropurine derivatives with the glycosyl bromide. A short and efficient synthetic route to the carbohydrate precursor 5-O-benzoyl-2,3-difluoro-α-d-arabinofuranosyl bromide was developed in five steps from d-xylose
通过2-氟嘌呤衍生物与二氟嘌呤衍生物盐的阴离子糖基化反应,制备了一系列新型嘌呤修饰的2',3'-二脱氧-2',3'-二氟-D-阿拉伯糖核苷,包括氟达拉滨和奈拉拉滨的氟化类似物。糖基溴化物。从d-木糖分五个步骤开发了一种短而有效的合成方法,以合成碳水化合物前体5 - O-苯甲酰基-2,3-二氟-α - d-阿拉伯呋喃糖基溴。基于与5- O反应的二乙基氨基三氟化硫(DAST)反应的研究,改进了5- O-苯甲酰基-2,3-二氟-α - d-阿拉伯呋喃糖苷的合成在关键步骤上,使用温和的反应条件,研究了保护基保护的甲基D-木糖苷。据报道,用DAST选择性氟化5- O-苯甲酰化的α-和β-D-戊呋喃糖苷的新特性导致形成单和二氟呋喃糖苷衍生物。