Synthesis of 5‘-Amino-5‘-phosphonate Analogues of Pyrimidine Nucleoside Monophosphates
作者:Xuemei Chen、David F. Wiemer
DOI:10.1021/jo030050x
日期:2003.8.1
diastereoselective, with the cytidine and uridine derivatives favoring the 5'S stereochemistry and the ara-C derivative favoring the 5'R isomer. The stereochemistry of one cytidine derivative was established by single-crystal diffraction analysis, and detailed comparisons of the (13)C NMR data allowed assignments of the other amino phosphonates.
胞苷,胞嘧啶阿拉伯糖苷(ara-C)和尿苷的5'-氨基-5'-膦酰基衍生物已通过相应的核苷醛制备。在衍生自核苷醛和对甲氧基苄胺的亚胺中添加亚磷酸酯是有效的,使用该胺可将产物裂解为母体氨基膦酸。亚磷酸酯的添加被证明是非对映选择性的,胞苷和尿苷衍生物有利于5'S立体化学,而ara-C衍生物有利于5'R异构体。通过单晶衍射分析确定了一种胞苷衍生物的立体化学,对(13)C NMR数据进行的详细比较允许对其他氨基膦酸酯进行赋值。