Palladium-catalyzed highly regioselective 6-exo-dig cyclization and alkenylation of ortho-ethynylanilides: the synthesis of polyene-substituted benzo[d][1,3]oxazines
作者:Zhong-Jian Cai、Chao Yang、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1039/c5cc06510k
日期:——
A Pd-catalyzed highly regioselective 6-exo-dig cyclization/alkenylation reaction of ortho-ethynylanilides has been developed.
Defined Hypervalent Iodine(III) Reagents Incorporating Transferable Nitrogen Groups: Nucleophilic Amination through Electrophilic Activation
作者:José A. Souto、Claudio Martínez、Irene Velilla、Kilian Muñiz
DOI:10.1002/anie.201206420
日期:2013.1.21
Only I and N: Hypervalent iodine(III) reagents with two reactive IN single bonds have been isolated for the first time. Their solid‐state and solution structures provide evidence for enhanced electrophilicity at iodine and nucleophilic character of the imine. As a result, improved reactivity in amination reactions and unprecedented nitrogen‐transfer reactions under metal‐free conditions are realized
The gold-catalysed reactions of alleneamides give different products depending on the substrate and the reaction conditions. In particular, N-(2-alkynylphenyl)-N-allenyltosylamides give benzazepines when using gold(III) catalysts in the presence of nucleophiles. This sequential process may follow two different reaction pathways, and these are discussed. Metal coordination to the alkyne followed by
Synthesis of 4<i>H</i>-3,1-Benzoxazines, Quinazolin-2-ones, and Quinoline-4-ones by Palladium-Catalyzed Oxidative Carbonylation of 2-Ethynylaniline Derivatives
作者:Mirco Costa、Nicola Della Cà、Bartolo Gabriele、Chiara Massera、Giuseppe Salerno、Matteo Soliani
DOI:10.1021/jo0357770
日期:2004.4.1
presence of catalytic amounts of 10% Pd/C in conjunction with Bu4NI and KF and under 2.4 MPa of a 3:1 mixture of CO and air. Anti and syn 6-exo-dig cyclization modes account for the formation of the two stereoisomers. Isomerization of the vinylpalladium intermediate may occur as well. Formation of a double carbonylation product 7r and of a gem-dimethoxycarbonylation product 6s, whose structures have been