作者:Vincenzo Zambrano、Gloria Rassu、Annamaria Roggio、Luigi Pinna、Franca Zanardi、Claudio Curti、Giovanni Casiraghi、Lucia Battistini
DOI:10.1039/b924721a
日期:——
stereocontrolled synthesis of (6S,7S,8S,8aR)-6,7,8-trihydroxyindolizidine (alias 1-deoxy-7,8-di-epi-castanospermine) (14) has been developed, which exploits an asymmetric vinylogous Mukaiyama aldol reaction (VMAR) between N-(tert-butoxycarbonyl)-2-(tert-butyldimethylsilyloxy)pyrrole (1) and 2,3-O-isopropylidene-D-glyceraldehyde (2) to construct the initial pyrrolidine building block 3, and an ene-ene
高效,立体控制的合成 (6 S,7 S,8 S,8a R)-6,7,8-三羟基吲哚并咪唑 (别名 1-脱氧-7,8-二-表-泛精胺)(14)已经开发出来,它利用了不对称的乙烯基Mukaiyama aldol反应(VMAR)N-(叔丁氧羰基)-2-(叔丁基二甲基甲硅烷氧基)吡咯(1)和2,3- O-异亚丙基-D-甘油醛(2)构造初始吡咯烷构件3和ene-烯 闭环易位反应(RCM)(9至10)来安装吲哚并idine啶骨架。合成步骤为13个步骤,总产率为19.5%。明确确定了14的构型和构象结构,并与先前发表的rac- 14和ent- 14的作业相面对。