Construction of Chiral Multi-Functionalized Polyheterocyclic Benzopyran Derivatives by Using an Asymmetric Organocatalytic Domino Reaction
作者:Zhi-Wei Guo、Xin-Sheng Li、Wei-Dong Zhu、Jian-Wu Xie
DOI:10.1002/ejoc.201200928
日期:2012.12
The asymmetric domino reaction of various α,α-dicyano olefins to 3-nitro-2H-chromenes was studied employing readily available cinchona-derived bifunctional thioureas as organocatalysts. These new transformations were highly regio-, chemo-, diastereo-, and enantioselective simultaneously giving chiral multi-functionalized polyheterocyclic benzopyran derivatives with multi-chiral carbon centers.
使用容易获得的金鸡纳衍生的双功能硫脲作为有机催化剂,研究了各种 α,α-二氰基烯烃与 3-硝基-2H-色烯的不对称多米诺反应。这些新的转化具有高度的区域选择性、化学选择性、非对映选择性和对映选择性,同时提供了具有多手性碳中心的手性多功能化多杂环苯并吡喃衍生物。