Herein, a cascade [3 + 2] annulation of N-aryloxyacetamides with 3-(hetero)arylpropiolic acids affording benzofuran-2(3H)-ones via rhodium(iii)-catalyzed redox-neutral C-H functionalization/isomerization/lactonization using an internal oxidative directing group O-NHAc was achieved. This catalytic system provides a regio- and stereoselective approach to synthesize (Z)-3-(amino(aryl)methylene)benzofuran-2(3H)-ones
申请人:Industry-Academic Cooperation Foundation, Yonsei University
公开号:US20140378399A1
公开(公告)日:2014-12-25
The present disclosure relates to a novel vascular leakage inhibitor. The novel vascular leakage inhibitor of the present invention inhibits the apoptosis of vascular endothelial cells, inhibits the formation of actin stress fibers induced by VEGF, and enhances the cortical actin ring structure, thereby inhibiting vascular leakage. Accordingly, the vascular leakage inhibitor of the present invention can prevent or treat various diseases caused by vascular leakage. Since the vascular leakage inhibitor of the present invention is synthesized from commercially available or easily synthesizable pregnenolones, it has remarkably superior feasibility of commercial synthesis.
Rh(<scp>iii</scp>)-catalyzed and alcohol-involved carbenoid C–H insertion into N-phenoxyacetamides using α-diazomalonates
作者:Jie Zhou、Jingjing Shi、Xuelei Liu、Jinlong Jia、Huacan Song、H. Eric Xu、Wei Yi
DOI:10.1039/c5cc00354g
日期:——
Here a new, mild and efficient Rh(iii)-catalyzed and alcohol-involved carbenoid insertion (ortho-alkylation) intoN-phenoxyacetamides using α-diazomalonates has been developed.
Rhodium(III)‐Catalyzed Enantio‐ and Diastereoselective C−H Cyclopropylation of N‐Phenoxylsulfonamides: Combined Experimental and Computational Studies
作者:Guangfan Zheng、Zhi Zhou、Guoxun Zhu、Shuailei Zhai、Huiying Xu、Xujing Duan、Wei Yi、Xingwei Li
DOI:10.1002/anie.201913794
日期:2020.2.10
Cyclopropane rings are a prominent structural motif in biologically active molecules. Enantio- and diastereoselective construction of cyclopropanes through C-H activation of arenes and coupling with readily available cyclopropenes is highly appealing but remains a challenge. A dual directing-group-assisted C-H activation strategy was used to realize mild and redox-neutral RhIII -catalyzed C-H activation
An internal oxidant-directing strategy enabling transition metal-free C–S bond ligation
作者:Yingying Zuo、Feng Xiong、Jing Zhao
DOI:10.1016/j.tet.2019.05.021
日期:2019.8
Organic sulfur compounds have broad applications in biology, medicine and material sciences and intensive efforts have been devoted to developing mild and general C-S bond-forming methods. However, a mild, transition-metal-free, direct C-H bond functionalization method remains elusive. Here, we report the use of an internal oxidant-directing strategy to achieve this goal. The cascade reactions described here show excellent chemoselectivity and a wide substrate scope for both oxyamines and sulfenylation reagents. This study enlarges the synthesis toolbox for preparing structurally diverse sulfilimines under mild conditions. (C) 2019 Elsevier Ltd. All rights reserved.