作者:Peter Somfai、Patrice Marchand、Staffan Torsell、Ulf M Lindström
DOI:10.1016/s0040-4020(02)01660-5
日期:2003.2
Asymmetric total syntheses of (+)-1-deoxynojirimycin (1) and (+)-castanospermine (2) are described. Starting from diene 3, the required absolute stereochemistry is introduced by an asymmetric hydroxylation followed by epoxidation. An intramolecular cyclization of amine 17 gives access to the corresponding tetrasubstituted piperidine 18, which is a precursor to compounds 1 and 2. (+)-Deoxynojirimicyn
描述了(+)-1-脱氧野oji霉素(1)和(+)-castanospermine(2)的不对称全部合成。从二烯3开始,所需的绝对立体化学是通过不对称羟基化然后进行环氧化而引入的。胺17的分子内环化作用可得到相应的四取代哌啶18,该四取代哌啶是化合物1和2的前体。由二烯3在11步中以36%的产率获得(+)-Deoxynojirimicyn(1),而在19步后由相同的原料以13%的产率获得(+)-castanospermine(2)。