Approach Towards the Total Synthesis of Rhizoxin: Enantioselective Preparation of the Lactone Core
作者:Marie-Ange N'Zoutani、Ange Pancrazi、Janick Ardisson
DOI:10.1055/s-2001-14601
日期:——
The construction of the C1 - C10 lactone core of rhizoxin, a 16-membered antitumoral macrolide, is reported. The strategy is based on the installation of the C7 and C8 asymmetric centers with a Brown allylation reaction. The C5 asymmetric carbon was controlled during a lactonisation step, leading to the equatorial chain at C5. Homologation sequences at C3 and C9 were performed via a Wadsworth-Emmons and a Takai reaction, respectively.
报道了抗肿瘤大环内酯药物rhizoxin的C1 - C10内酯核心的构建。该策略基于使用Brown烯基化反应建立C7和C8的不对称中心。在内酯化步骤中控制了C5的不对称碳,最终在C5处形成了赤道链。C3和C9的同族化反应分别通过Wadsworth-Emmons反应和Takai反应实现。