作者:Louis S. Hegedus、Lisa Geisler、Andrew G. Riches、Sarri S. Salman、Gisela Umbricht
DOI:10.1021/jo020151f
日期:2002.11.1
Butenolides 5a and 13 were used as optically active templates in the de novo synthesis of 4'-disubstituted nucleoside analogues. The butenolides were reduced and acylated in situ to give acetates 10 and 14. Vorbrüggen coupling gave the protected nucleoside analogues 11 and 15. Reduction of 11 gave 4'-ethoxy-2',3'-dideoxythymidine (6) and deprotection of 15 gave 4'-ethoxy-2',3'-dideoxydidehydrothymidine
丁烯内酯5a和13用作4'-二取代核苷类似物的从头合成中的旋光模板。还原丁烯内酯并原位酰化得到乙酸酯10和14。Vorbrüggen偶联得到受保护的核苷类似物11和15。还原11得到4′-乙氧基-2′,3′-二脱氧胸苷(6)和15的脱保护基得到4′-乙氧基-2′,3′-二脱氧二氢胸苷(7)。发生了多种丁烯内酯的顺二羟基化反应,主要产物由β面的氧化形成。