Total Synthesis of the Antitumor Acetogenin Mosin B: Desymmetrization Approach to the Stereodivergent Synthesis of threo/trans/erythro-Type Acetogenins
作者:Naoyoshi Maezaki、Naoto Kojima、Atsunobu Sakamoto、Hiroaki Tominaga、Chuzo Iwata、Tetsuaki Tanaka、Morito Monden、Bazarragchaa Damdinsuren、Shoji Nakamori
DOI:10.1002/chem.200390040
日期:2003.1.20
A total synthesis of the threo/trans/erythro-type acetogenin mosin B and one of its diastereomers has been achieved. The carbon skeleton is assembled in a convergent fashion from two segments (a THF ring segment and a gamma-lactone segment) through the Nozaki-Hiyama-Kishi reaction. The THF ring segment was stereoselectively constructed by a stereodivergent synthesis starting from a common intermediate
苏氨酸/反式/赤型产乙酸原蛋白mosin B及其非对映异构体之一的全合成。碳骨架是通过两个部分(THF环部分和γ-内酯部分)通过Nozaki-Hiyama-Kishi反应以收敛方式组装的。THF环链段是基于不对称化策略,从常见的中间体(4-环己烯-1,2-二醇)通过立体发散性合成而立体选择性地构建的。γ-内酯链段是通过将三氟甲磺酸酯和手性α-亚磺酰基γ-内酯偶联而合成的。根据这些合成结果,我们建议天然mosin B的绝对构型为1 a。还研究了1a和1b的抗增殖作用。