4-bis(benzyloxy)-2-[(benzyloxy)methyl]-5-[( TERT-butyldimethylsiloxy)methyl]pyrrolidine were synthesized from D-glucose as precursor in the stereoselective synthesis of hyacinthacines. The key strategies were the ring opening of the sugar epoxide with sodium azide to convert the configuration at C-2 and C-3 of D-glucose and simultaneous reduction and intramolecular cyclization. 5- EPI-Hyacinthacine A
两个部分保护的
吡咯烷 (2 R,3 S,4 R,5 S)- 和 (2 R,3 S,4 R,5 R)-3,4-bis(benzyloxy)-2-[(benzyloxy)methyl ]-5-[(叔丁基二甲基甲
硅烷氧基)甲基]
吡咯烷以
D-葡萄糖为前驱体在风信子立体选择性合成中合成。关键策略是用
叠氮化
钠开环糖
环氧化物以转换
D-葡萄糖的 C-2 和 C-3 构型,同时还原和分子内环化。5-E
PI-Hyacinthacine A 4 由(2 R,3 S,4 R,5 S)-
吡咯烷通过Wittig反应和环化合成。