Catalytic Asymmetric Construction of Vicinal Tetrasubstituted Stereocenters by the Mannich Reaction of Linear α-Substituted Monothiomalonates with Isatin <i>N</i>-Boc Ketimines
作者:Teng Liu、Weiwei Liu、Xiaonian Li、Fangzhi Peng、Zhihui Shao
DOI:10.1021/acs.joc.5b00302
日期:2015.5.15
A highly diastereo- and enantioselective method for the construction of vicinal tetrasubstituted stereocenters through the first catalytic asymmetric Mannich reaction of linear α-substituted MTMs with isatin N-Boc ketimines has been developed. This protocol provides atom-economic synthesis of less accessible 3-aminooxindoles bearing vicinal tetrasubstituted stereocenters. Notably, it also constitutes
已经开发了通过线性α-取代的MTM与靛红N -Boc酮亚胺的第一催化不对称曼尼希反应来构建邻位四取代的立体中心的高度非对映体和对映体选择性的方法。该协议提供了不太经济的带有邻位四取代立体中心的3-氨基氧吲哚的原子经济合成。值得注意的是,它也构成了带有邻位四取代立体中心的β-氨基硫酯的立体选择性合成的第一个例子。