作者:Li, Qiaoqiang、Dai, Yuqing、Xu, Xinru、Wu, Wentao、Chen, Wenchao、Wang, Hong、Tan, Choon-Hong、Ye, Xinyi
DOI:10.1021/acs.orglett.4c02202
日期:——
In this work, we describe an enantioselective reduction and sulfenylation of isoflavanone derivatives by an ion pair strategy. The chiral cationic catalyst bisguanidinium (BG) is capable of chiral induction in catalytic systems. Silane hydride works as a reductant and helps to form an anionic hypervalent silicate complex and intermediates with substrates to pair with chiral catalyst. A series of umpolung
在这项工作中,我们描述了通过离子对策略对异黄烷酮衍生物进行对映选择性还原和磺酰化。手性阳离子催化剂双胍 ( BG ) 能够在催化体系中进行手性诱导。硅烷氢化物作为还原剂,有助于与底物形成阴离子超价硅酸盐络合物和中间体,以与手性催化剂配对。一系列的反极性硫试剂在硅酸盐阴离子存在下完成亲电子攻击。化学选择性和对映选择性均从良好到优异,可提供多种 4-oxo-4 H-色烯-3-甲腈和S-亲电子试剂。完成进一步改造以引入更多应用。