Synthesis of the Pluramycins 2: Total Synthesis and Structure Assignment of Saptomycin B
作者:Kei Kitamura、Yoshihiko Maezawa、Yoshio Ando、Takenori Kusumi、Takashi Matsumoto、Keisuke Suzuki
DOI:10.1002/anie.201308017
日期:2014.1.27
A concise, highly convergent total synthesis of saptomycin B, a member of the pluramycin class of antitumor antibiotics, is reported. The target compound was assembled from four building blocks (a tricyclic platform, two sugars, and an alkynal) in 15% yield through 10 synthetic operations. The key steps included the regioselective installation of two amino sugars (L‐vancosamine and D‐angolosamine)
据报道,简明的,高度收敛的全合成的Saptomycin B,是抗肿瘤抗生素的pluramycin类成员。通过10次合成操作,从15个产率的15%收率中,从四个构件(三环平台,两个糖和一个炔基)组装了目标化合物。关键步骤包括在三轮车上选择性选择性地安装两个氨基糖(L- vancosamine和D- angolosamine),以及通过羟醛反应有效地构建四环骨架,然后形成吡喃酮。在C14未知配置被分配了作为[R 。