Asymmetric [3 + 2] Cycloaddition of 2,2′-Diester Aziridines To Synthesize Pyrrolidine Derivatives
作者:Yuting Liao、Baixin Zhou、Yong Xia、Xiaohua Liu、Lili Lin、Xiaoming Feng
DOI:10.1021/acscatal.7b00787
日期:2017.6.2
A highly diastereo- and enantioselective [3 + 2] cycloaddition of 2,2′-diester aziridines with 3,4-dihydropyran derivatives and acyclic enol ethers has been established. Various optically active octahydropyrano[2,3-c]pyrrole and 3-methoxypyrrolidine derivatives were generated in moderate to high yields (up to 94%) and good stereoselectivities (>19:1 dr, up to 95.5:4.5 er). The methodology was also
已经建立了2,2'-二酯氮丙啶与3,4-二氢吡喃衍生物和非环烯醇醚的高度非对映和对映选择性[3 + 2]环加成反应。以中等至高产率(高达94%)和良好的立体选择性(> 19:1 dr,高达95.5:4.5 er)生成了各种旋光的八氢吡喃并[2,3- c ]吡咯和3-甲氧基吡咯烷衍生物。该方法还用于d-半乳糖衍生物的高度非对映选择性合成中。八氢吡喃并[2,3- c ]吡咯的绝对构型表明,在最后的环化步骤中,使用3,4-二氢吡喃和6-烷基取代的吡咯为底物的反应给出了反向的非对映异构。