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.
Highly Efficient Synthesis of 2-Substituted Benzo[b]furan Derivatives from the Cross-Coupling Reactions of 2-Halobenzo[b]furans with Organoalane Reagents
route for the synthesis of 2-substituted benzo[b]furans has been developed by palladium-catalyzed cross-coupling reaction of 2-halobenzo[b]furans with aryl, alkynyl, and alkylaluminum reagents. Various 2-aryl-, 2-alkynyl-, and 2-alkyl-substituted benzo[b]furan derivatives can be obtained in 23–97% isolated yields using 2–3 mol% PdCl2/4–6 mol% XantPhos as the catalyst under mild reaction conditions. The
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