作者:Wenkui Lan McEldoon、David F. Wiemer
DOI:10.1016/0040-4020(95)00363-d
日期:1995.6
Nucleophilic addition of diethyl phosphite anion to several 2′- or 3′-keto nucleosides results in an efficient synthesis of 2′-hydroxy-2′-phosphono- or 3′-hydroxy-3′-phosphononucleosides. The stereochemistry of one such adduct, 3′α-diethylphosphono-3′β-hydroxy-5′-O-tritylthymidine, was determined by single crystal diffraction analysis. When the 5′-hydroxyl group is protected with groups that are not
将亚磷酸二乙酯阴离子亲核加成到几个2'-或3'-酮核苷中可有效合成2'-羟基-2'-膦酰基-或3'-羟基-3'-膦核苷。通过单晶衍射分析确定一种这样的加合物3'α-二乙基膦酰基-3'β-羟基-5'-O-三苯甲基胸苷的立体化学。当5'-羟基被不需要空间的基团保护时,3'双羟基膦酸酯在改良的Barton条件下进行自由基脱氧,从而以高收率得到还原的化合物。除去剩余的羟基保护基,并水解膦酸酯,然后得到母体核苷3'-膦酸。