Ionic liquid: an efficient and reusable media for seleno- and thioester synthesis promoted by indium
作者:Greice Tabarelli、Eduardo E. Alberto、Anna M. Deobald、Graciane Marin、Oscar E.D. Rodrigues、Luciano Dornelles、Antonio L. Braga
DOI:10.1016/j.tetlet.2010.08.076
日期:2010.10
A series of thio and selenoesters were efficiently obtained employing stable diorganyl chalcogenides, acyl chlorides, and In as reducing agent in BMIM center dot PF6. Recycling of the ionic liquid was also performed, which was reused three times. (C) 2010 Elsevier Ltd. All rights reserved.
Byeon, Chang-Ho; Hart, David J.; Lai, Chin-Shan, Synlett, 2000, # 1, p. 119 - 121
作者:Byeon, Chang-Ho、Hart, David J.、Lai, Chin-Shan、Unch, James
DOI:——
日期:——
Diels-Alder Reactions of <i>α</i>,<i>β</i>-Unsaturated Thioesters and <i>α</i>,<i>β</i>-Unsaturated Selenoesters
作者:Chang-Ho Byeon、Cheng-Yi Chen、David A. Ellis、David J. Hart、Jing Li
DOI:10.1055/s-1998-1738
日期:1998.6
α,β-Unsaturated thioesters and selenoesters serve as dienophiles in Diels-Alder reactions with a variety of 1,3-dienes. Good levels of regioselectivity are obtained with unsymmetrical dienes when Lewis acid promoters are used. Thioesters and selenoesters are more reactive than the corresponding methyl esters based on competition experiments with cyclopentadiene.