An expedient total synthesis of optically active piperidine and indolizidine alkaloids (−)-β-conhydrine and (−)-lentiginosine
作者:Ahmed Kamal、Saidi Reddy Vangala
DOI:10.1016/j.tet.2010.11.011
日期:2011.2
Attempts directed toward the stereocontroled total synthesis of piperidine and indolizidine alkaloids resulted in the synthesis of (−)-β-conhydrine 1 and (−)-lentiginosine 3. The synthesis of 1 and 3 were developed from protected d-mannitol as the chiral precursor, which involved nucleophilic addition and azide nucleophilic substitution, Barbier allylation, ring closing metathesis, and Sharpless asymmetric
朝向哌啶和吲哚里生物碱的stereocontroled总合成涉及尝试导致的合成( - ) - β-conhydrine 1和( - ) - lentiginosine 3。1和3的合成是由受保护的d-甘露醇作为手性前体开发的,其中涉及亲核加成和叠氮化物亲核取代,Barbier烯丙基化,闭环易位和Sharpless不对称二羟基化为关键步骤。