Protection of Phosphonate Function by Means of Ethoxycarbonyl Group. A New Method for Generation of Reactive Silyl Phosphite Intermediates
作者:Mitsuo Sekine、Hiroyuki Mori、Tsujiaki Hata
DOI:10.1246/bcsj.55.239
日期:1982.1
to highly reactive bis(trimethylsilyl) nucleoside phosphite intermediates which were allowed in situ to react with water, diphenyl disulfide, 2,2′-dipyridyl disulfide, and aldehydes to afford the corresponding nucleoside phosphonates, nucleoside S-phenyl phosphorothioates, nucleoside phosphates, and nucleoside α-hydroxy phosphonates in good yields, respectively. The nucleoside phosphonates were further
核苷乙氧羰基膦酸酯通过适当保护的核苷与乙氧羰基膦酸缩合制备。它们很容易通过用 1 M NaOH 处理然后三甲基甲硅烷基化转化为高反应性的双(三甲基甲硅烷基)核苷亚磷酸酯中间体,然后原位与水、二苯基二硫化物、2,2'-二吡啶基二硫化物和醛反应,得到相应的核苷膦酸酯、核苷 S-苯基硫代磷酸酯、核苷磷酸酯和核苷 α-羟基膦酸酯分别具有良好的产率。在温和的酸性条件下,核苷膦酸酯进一步转化为核苷。因此,乙氧羰基被证明是一种多功能的保护基团,不仅可以保护 H-P(O),还可以保护 HO-P(O) 和糖的羟基。