Construction of Benzofuran-3(2<i>H</i>)-one Scaffolds with a Quaternary Center via Rh/Co Relay Catalyzed C–H Functionalization/Annulation of <i>N</i>-Aryloxyacetamides and Propiolic Acids
作者:Wen-Kui Yuan、Ming-Hui Zhu、Rui-Sen Geng、Guang-Yi Ren、Lin-Bao Zhang、Li-Rong Wen、Ming Li
DOI:10.1021/acs.orglett.9b00181
日期:2019.3.15
An unprecedented synthesis of valuable benzofuran-3(2H)-one scaffolds with a quaternary center was developed via Rh/Co relay catalyzed C–H functionalization/annulation of N-aryloxyacetamides with propiolic acids in moderate to good yields. The reaction features the simultaneous construction of the benzofuran motif containing a C2 quaternary center and a C3 carbonyl group. The preliminary mechanism
通过Rh / Co中继催化N-芳氧基乙酰胺与丙酸的C–H官能化/环化,中等至良好的产率,开发了具有四元中心的有价值的苯并呋喃3(2 H)-1骨架的空前合成。该反应的特征在于同时构建含有C 2季中心和C 3羰基的苯并呋喃基序。初步机理研究证明,C3羰基的O原子起源于分子氧。