A new palladium-catalyzed coupling reaction of vinylic and allylic triflates with pyrimidine nucleosides
作者:Mohamed Ezeldin Hassan
DOI:10.1139/v91-031
日期:1991.2.1
Vinylic trifluoromethane sulfonates (triflates) form palladium intermediates that react with pyrimidine nucleosides to produce C-5 alkyl substituted nucleosides after hydrogenation of the vinylic coupling products with hydrogen and Pd/C in methanol. The reaction, which is run under mild conditions, appears to be a general one since both mono- and disubstituted vinylic triflates, as well as the cyclic
乙烯基三氟甲烷磺酸盐(三氟甲磺酸盐)形成钯中间体,在乙烯偶联产物与氢和 Pd/C 在甲醇中氢化后,该中间体与嘧啶核苷反应生成 C-5 烷基取代的核苷。该反应在温和条件下进行,似乎是一般的反应,因为单取代和双取代的乙烯基三氟甲磺酸酯以及环状三氟甲磺酸酯均产生高产率的相应 C-5 烷基取代核苷。与三氟甲磺酸烯丙酯的反应需要使用 5-氯汞核苷。关键词: 核苷, 三氟甲磺酸盐, 钯催化