Enantioselective Allyltitanation. Synthesis of (-)-Slaframine
作者:Janine Cossy、Catherine Willis、Véronique Bellosta、Laurent Saint-Jalmes
DOI:10.1055/s-2002-28505
日期:——
An enantioselective synthesis of the indolizidine alkaloid (-)-slaframine from aldehyde 1 is reported. The stereogenic centers at C-1 and C-8a are introduced by an enantioselective allyltitanation and a Mitsunobu reaction. Reductive double cyclization of the acyclic compound (-)-10 affords the bicyclic skeleton of (-)-slaframine.
报告了从醛 1 对吲哚利嗪生物碱 (-)-slaframine 的对映选择性合成。通过对映选择性烯丙基钛化和 Mitsunobu 反应引入了 C-1 和 C-8a 的立体中心。无环化合物 (-)-10 的还原双环化反应生成了 (-)-slaframine 的双环骨架。