Synthesis of Pyranoid Analogues of the Anti-HIV Active 3′-Deoxy-2′,3′-didehydrothymidine (D4T)
作者:H. Bue Hansen、Erik B. Pedersen、Bent Faber Vestergaard
DOI:10.1002/ardp.19923250808
日期:——
The primary hydroxy group of ethyl 2,3‐dideoxy‐α‐D‐erythro‐hex‐2‐enopyranoside (1) was selectively protected and the secondary hydroxy group was deoxygenated via the dithiocarbonate 3 from which ethyl 6‐O‐(4‐methoxybenzoyl)‐2,3,4‐trideoxy‐α‐D‐trideoxy‐α‐2‐enopyranoside (4) and its regioisomer (5) were produced. These were converted into didehydro nucleosides by glycosylation of silylated heterocyclic
2,3-双脱氧乙基-α-D-赤型-己-2-烯吡喃糖苷(1)的伯羟基被选择性保护,仲羟基通过二硫代碳酸酯3脱氧,其中乙基6-O-(4-甲氧基苯甲酰基)-2,3,4-三脱氧-α-D-三脱氧-α-2-烯吡喃糖苷(4)及其区域异构体(5)。在作为催化剂的三甲基甲硅烷基三氟甲磺酸酯存在下,通过甲硅烷基化杂环碱基的糖基化将这些转化为双脱氢核苷。异头产物的构型通过相应的饱和化合物的 1 H-NMR 分析确定,这些化合物是通过氢化碳水化合物部分中的双键获得的。化合物9a、b、d、10a、b、14a、b、e、f和15a、b、e、f对HIV或HSV-1没有显示任何显着活性。