the asymmetric synthesis of the polypropionate segment of rutamycin B is reported. In this convergent synthesis the construction of the C1-C8 and C9-C17 subunits and their union through a double stereodifferentiating aldol fragment coupling are described. The stereoselectivity of this coupling reaction critically depends on both the configuration and choice of protecting group for the C9 oxygen.
据报道,
红霉素B的聚
丙烯酸酯链段的不对称合成。在该收敛性合成中,描述了C 1 -C 8和C 9 -C 17亚基的构建以及它们通过双立体分化醛醇缩合片段偶联的结合。该偶联反应的立体选择性主要取决于C 9
氧的构型和保护基的选择。