作者:Joseph Michael、Charles de Koning、Theophilus Mudzunga、Riaan Petersen
DOI:10.1055/s-2006-951532
日期:——
The conversion of (-)-2,3-O-isopropylidene-D-erythronolactone (14) and 2-benzyloxy-6-bromo-4-methoxy-3-methyl-aniline (18) into (1R,2R)-(-)-1-azido-2,3,5,8-tetrahydro-7-methoxy-6-methyl-2-methanesulfonyloxy-5,8-dioxo-1H-pyrrolo-[l,2-a]indol-9-yl}methyl phenyl carbonate (39) has been accomplished in 17 steps by way of the enaminone 26. Key steps included the preparation of 26 by a Reformatsky reaction
(-)-2,3-O-异亚丙基-D-赤酮内酯(14)和2-苄氧基-6-溴-4-甲氧基-3-甲基-苯胺(18)转化为(1R,2R)- (-)-1-azido-2,3,5,8-tetrahydro-7-methoxy-6-methyl-2-methanesulfonyloxy-5,8-dioxo-1H-pyrrolo-[l,2-a]indol-9 -yl}甲基苯基碳酸酯 (39) 已通过烯胺酮 26 分 17 步完成。关键步骤包括通过对硫内酰胺前体 25 的 Reformatsky 反应制备 26,以及 26 的分子内 Heck 反应形成吲哚环. 39 的制备构成了全功能化的 7-甲氧基氮丙啶基亚胺 12 的正式合成,这是第二次完成的此类合成。