A short approach to the tetrahydrofuran fragment of amphidinolides X and Y has been developed through the combination of iterative Sharpless asymmetric epoxidations, Pd-catalyzed regioselective hydrogenolysis of a 4,5-epoxy-2-alkenoate and the disfavored 5-endo-tet ring closure of a β-hydroxy epoxide promoted by a double bond adjacent to the epoxide function.
通过迭代的Sharpless不对称环氧化、Pd催化的4,5-环氧-2-烯酸酯的区域选择性加氢解和邻近环氧功能的双键促进的β-羟基
环氧化物的不利5-内环闭合,开发了一种简短的方法来合成两性
醇类X和Y的
四氢呋喃片段。