A palladium-catalyzed Barluenga cross-coupling – Reductive cyclization sequence to substituted indoles
作者:S.M. Ashikur Rahman、Björn C.G. Söderberg
DOI:10.1016/j.tet.2021.132331
日期:2021.8
A short and flexible synthesis of substituted indoles employing two palladium-catalyzed reactions, a Barluenga cross-coupling of p-tosylhydrazones with 2-nitroarylhalides followed by a palladium–catalyzed, carbon monoxide–mediated reductive cyclization has been developed. A one-pot, two-step methodology was further developed, eliminating isolation and purification of the cross-coupling product. This
The regioselective Larock indole synthesis catalyzed by NHC–palladium complexes
作者:Pan He、Yufeng Du、Gang Liu、Changsheng Cao、Yanhui Shi、Juan Zhang、Guangsheng Pang
DOI:10.1039/c3ra42788a
日期:——
The first practical and regioselective process for the synthesis of 2,3-disubstituted indoles from the reaction of o-iodoanilines or o-bromoanilines and their derivatives with symmetrical and unsymmetrical internal alkynes catalyzed by a ferrocene-functionalized N-heterocyclic carbene (NHC)âpalladium complex has been developed, and the indoles were isolated in good yields with high regioselectivity.
The development of aerobic oxidative C–H/N–H cross-coupling catalyzed by the first-row transition metals is attractive yet challenging. Here, the first iron-catalyzed intramolecular cross-dehydrogenative coupling for the synthesis of carbazoles and indoles using air as the oxidant is reported. The general and efficient protocol allows for C–Nbondformation under green conditions with excellent functional
Regioselective Pd-catalyzed indolization of 2-bromoanilines with internal alkynes using phosphine-free ligands
作者:Xin Cui、Juan Li、Yao Fu、Lei Liu、Qing-Xiang Guo
DOI:10.1016/j.tetlet.2008.03.112
日期:2008.5
The possibility of using phosphine-free ligands to promote Pd-catalyzed indolization of 2-bromoanilines with internal alkynes was examined for the first time. Phenylurea was found to be the optimal ligand, which could mediate the synthesis of 2,3 -disubstituted indoles in good yields (ca. 60-85%) with high regioselectivity. (C) 2008 Elsevier Ltd. All rights reserved.
BACCOLINI, G.;BARTOLI, G.;MAROTTA, E.;TODESCO, P. E., J. CHEM. SOC. PERKIN TRANS., 1983, N 11, 2695-2697
作者:BACCOLINI, G.、BARTOLI, G.、MAROTTA, E.、TODESCO, P. E.