Free-radical synthesis of 3-(2-cyanoethyl)- and 3-(2-methoxycarbonylethyl)-2,3-dideoxy-α-D-Erythro-pentofuranoside and their application in the synthesis of potential antiviral nucleosides
作者:Jesper Lau、Krzysztof Walczak、Krzysztof Pupek、Carsten Buch、Carsten M. Nielsen、Erik B. Pedersen
DOI:10.1002/ardp.2503241203
日期:——
3‐(2‐methoxycarbonylethyl>‐2,3‐dideoxypentofuranose 3b. Nucleoside coupling of 3a with silylated uracil gave an anomeric mixture of β‐ and α‐nucleoside 8 and 9 which were deprotected to give 10 and 11, respectively. Similar reaction of 3b with silylated N4‐isobutyrylcytosine gave 12 and 13 which were deprotected to give the final nucleosides 16 and 17, respectively. None of the compounds 10a, 11, 14‐17
在三丁基氢化锡和自由基引发剂 (AIBN) 存在下,不同的碳水化合物离析物 2、5 和 7 与丙烯腈发生自由基反应,得到甲基 3-(2-氰乙基)-2,3-二脱氧戊呋喃糖苷 3a 和 6。 2与丙烯酸甲酯反应得到3-(2-甲氧基羰基乙基>-2,3-二脱氧戊呋喃糖3b。3a与甲硅烷基化尿嘧啶核苷偶联得到β-和α-核苷8和9的异头混合物,脱保护得到10和11,分别。3b 与甲硅烷基化 N4-异丁酰胞嘧啶的类似反应得到 12 和 13,它们被脱保护,分别得到最终的核苷 16 和 17。化合物 10a、11、14-17 都没有显示出显着的抗 HIV 活性。