A Facile Access to Fluorinated Pyrrolidines via Catalytic Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Ylides with Methyl<i>α</i>-Fluoroacrylate
作者:Dingce Yan、Qinghua Li、Chunjiang Wang
DOI:10.1002/cjoc.201200765
日期:2012.10.30
Asymmetric 1,3‐dipolar cycloaddition of methyl α‐fluoroacrylate with azomethine ylides for the construction of optically active fluorinated pyrrolidines bearing one unique fluorinated quaternary and two tertiary stereogenic centers has been achieved with Cu(CH3CN)4BF4/TF‐BiphamPhos complexes for the first time. This catalytic system performs well over a broad scope of substrates, providing the synthetically
Cu(CH 3 CN)4 BF 4 / TF-BiphamPhos可实现α-氟代丙烯酸甲酯与偶氮甲亚胺的不对称1,3-偶极环加成反应,以构建带有一个独特的氟化季铵和两个叔立体中心的旋光性氟化吡咯烷。复杂的第一次。该催化体系在广泛的底物上表现良好,以高收率,优异的非对映选择性和良好至高对映选择性提供了合成上有用的加合物。