3-Isothiocyanato Oxindoles Serving as Powerful and Versatile Precursors to Structurally Diverse Dispirocyclic Thiopyrrolidineoxindoles through a Cascade Michael/Cyclization Process with Amino-Thiocarbamate Catalysts
作者:Wen-Yong Han、Shi-Wu Li、Zhi-Jun Wu、Xiao-Mei Zhang、Wei-Cheng Yuan
DOI:10.1002/chem.201300206
日期:2013.4.26
Cascading catalysis: 3‐Isothiocyanato oxindoles act as powerful and versatile precursors for a range of structurally diverse dispirocyclic thiopyrrolidineoxindoles containing two spiro‐quaternary and three contiguous stereogenic centers in quantitative yields with excellent disatereo‐ and enantioselectivities by only using 1 mol % amino‐thiocarbamate catalyst.
级联催化:3-异硫氰酸根合吲哚是一系列结构多样的二螺环硫代吡咯烷并吲哚的有力且用途广泛的前体,仅使用1 mol%氨基硫代氨基甲酸酯催化剂,其定量收率就具有两个螺-季四和三个连续的立体中心,并具有优异的对映和对映选择性。 。