Stereoselective Total Synthesis of (±)-Swainsonine Based on Endo Mode Cyclization
作者:Chisato Mukai、Yu-ichi Sugimoto、Kana Miyazawa、Sumie Yamaguchi、Miyoji Hanaoka
DOI:10.1021/jo980598h
日期:1998.9.1
treatment of cis-3,4-epoxy-7-(p-toluenesulfonamido)-1-heptyne with dicobalt octacarbonyl, Lewis acid, and cerium(IV) ammonium nitrate effected stereoselective formation of the trans-2-ethynyl-3-hydroxypiperidine skeleton with retention of configuration at the propynyl center. The piperidine derivative thus prepared was converted into the title compound efficiently.
描述了新的(+/-)-swainsonine的立体选择性全合成。顺式二羰八羰基,路易斯酸和硝酸铈(IV)铵连续处理顺式3,4-环氧-7-(对甲苯磺酰胺基)-1-庚炔可立体选择性地形成反式-2-乙炔基-3-羟基哌啶骨架,在丙炔中心保留构型。如此制备的哌啶衍生物有效地转化为标题化合物。