Lewis Acid Catalyzed Conjugate Addition and the Formation of Heterocycles using Michael Acceptors under Solvent-Free Conditions
作者:Alemayehu Mekonnen、Rolf Carlson
DOI:10.1002/ejoc.200500923
日期:2006.4
Conjugate addition and conjugate-addition-initiated ring closure (CAIRC) reactions of β-dicarbonyl compounds with Michael acceptors have been studied using several Lewis acid catalysts under solvent-free conditions. Excellent chemoselectivity was obtained when various Michael acceptors were treated with several β-dicarbonyl compounds. On the other hand, 2-bromo-2-cyclopentenone and 3-bromo-3-vinyl
已经使用几种路易斯酸催化剂在无溶剂条件下研究了 β-二羰基化合物与迈克尔受体的共轭加成和共轭加成引发的闭环 (CAIRC) 反应。当用多种 β-二羰基化合物处理各种迈克尔受体时,获得了优异的化学选择性。另一方面,2-溴-2-环戊烯酮和3-溴-3-乙烯基甲基酮在用相同试剂处理时提供2,3-二氢呋喃而不是1,4-加合物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)