Expeditious Syntheses of Sugar-Modified Nucleosides and Collections Thereof Exploiting Furan-, Pyrrole-, and Thiophene-Based Siloxy Dienes
作者:Gloria Rassu、Franca Zanardi、Lucia Battistini、Enrico Gaetani、Giovanni Casiraghi
DOI:10.1021/jm960400q
日期:1997.1.1
enriched 2',3'-dideoxynucleosides 14a-c (alpha and beta anomers of L- and D-series), 2',3'-dideoxy-4'-thionucleosides 21a-c (alpha and beta anomers of L- and D-series), and 2',3'-dideoxy-4'-azanucleosides 28a-c (beta anomers of L- and D-series) were synthesized, with uniform chemistry and high stereochemical efficiency, exploiting a triad of versatile heterocyclic siloxy dienes, namely, 2-(tert-but
一系列单独的糖修饰的嘧啶核苷,包括对映体富集的2',3'-二脱氧核苷14a-c(L和D系列的α和β端基异构体),2',3'-二脱氧-4'-硫代核苷21a-合成了c(L和D系列的α和β端基异构体)和2',3'-二脱氧-4'-氮杂核苷28a-c(L和D系列的β端基异构体)立体化学效率,利用三元组的多功能杂环甲硅烷氧基二烯,即2-(叔丁基二甲基甲硅烷氧基)呋喃(TBSOF),2-(叔丁基二甲基甲硅烷氧基)噻吩(TBSOT)和N-(叔丁氧基羰基)-2-(叔丁基二甲基甲硅烷氧基)吡咯(TBSOP)。合成方法有利地使用甘油醛丙酮化物的对映体(D-1和L-1)作为手性来源和甲酰基阳离子的合成等同物。