An efficient tandem elimination–cyclization–desulfitative arylation of 2-(gem-dibromovinyl)phenols(thiophenols) with sodium arylsulfinates
作者:Wei Chen、Pinhua Li、Tao Miao、Ling-Guo Meng、Lei Wang
DOI:10.1039/c2ob27232f
日期:——
An efficient tandem eliminationâcyclizationâdesulfitative arylation of 2-(gem-dibromovinyl)phenols(thiophenols) with sodium arylsulfinates has been developed. In the presence of TBAFâPdCl2âCu(OAc)2âNEt3, the reactions generated 2-arylbenzofurans(thiophenes) with good yields in one-pot under ligand-free conditions.
One-pot synthesis of benzofused heteroaryl azoles <i>via</i> tandem C-heteroatom coupling/C–H activation of azoles
作者:Xurong Qin、Xuefeng Cong、Dongbing Zhao、Jingsong You、Jingbo Lan
DOI:10.1039/c1cc10572h
日期:——
The Cu(I) or Pd(II)-catalyzed cross-couplings of gem-dihaloolefins with azoles viatandem C-heteroatom coupling/C-Hactivation for the preparation of benzofused heteroaryl azoles have been developed.
Pd-Catalyzed Tandem Chemoselective Synthesis of 2-Arylbenzofurans using Threefold Arylating Triarylbismuth Reagents
作者:Maddali L. N. Rao、Deepak N. Jadhav、Priyabrata Dasgupta
DOI:10.1002/ejoc.201201314
日期:2013.2
A tandemchemoselectivesynthesis of 2-arylbenzofurans was accomplished from o-hydroxy-gem-(dibromovinyl)benzenes and BiAr3 reagents under palladium-catalyzed conditions. This unique and synthetically valuable strategy proceeds through three consecutive coupling reactions involving triarylbismuthreagents and provides 2-arylbenzofuran products in high yields.
Tandem Synthesis of 2-Carboxybenzofurans <i>via</i> Sequential Cu-Catalyzed C–O Coupling and Mo(CO)<sub>6</sub>-Mediated Carbonylation Reactions
作者:Qinliang Mo、Nan Sun、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1021/acs.joc.0c01620
日期:2020.9.4
A modular tandem synthesis of 2-carboxybenzofurans from 2-gem-dibromovinylphenols has been established based on a sequence of Cu-catalyzed intramolecular C–O coupling and Mo(CO)6-mediated intermolecular carbonylationreactions. This protocol allowed one-step access to a broad variety of functionalized benzofuran-2-carboxylic acids, esters, and amides in good to excellent yields under Pd- and CO gas-free
Synthesis of Diversely Functionalized 2<i>H</i>-Chromenes through Pd-Catalyzed Cascade Reactions of 1,1-Dibromoolefin Derivatives with Arylboronic Acids
作者:Xia Song、Cai Gao、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.8b02456
日期:2018.12.21
this work, an unprecedented synthesis of (2H-chromen-2-ylidene)acetates and (2H-chromen-2-ylidene)ethanones with controlled stereoselectivity via Pd-catalyzed cascade reactions of 3-(2-(2,2-dibromovinyl)phenoxy)acrylates or 3-(2-(2,2-dibromovinyl)phenoxy)enones with aryl boronic acids has been established. This protocol combines two C–C bond forming reactions (an intermolecular Suzuki coupling followed