Telescoped Enolate Arylation/HWE Procedure for the Preparation of 3-Alkenyl-Oxindoles: The First Synthesis of Soulieotine
作者:Alessia Millemaggi、Alexis Perry、Adrian C. Whitwood、Richard J. K. Taylor
DOI:10.1002/ejoc.200900294
日期:2009.6
A telescoped sequence involving palladium-catalysed intramolecular enolate arylation followed by an in situ HWE olefination has been developed to provide rapid access to 3-alkenyl-oxindoles. This “one-pot” process, which is greatly accelerated by microwave irradiation, proceeds with low loadings of palladium(II) acetate (0.2–1.0 mol-%), and has been used to prepare a range of adducts derived from aromatic
已经开发了涉及钯催化的分子内烯醇芳基化和原位 HWE 烯化的伸缩序列,以提供对 3-烯基-羟吲哚的快速访问。这种通过微波辐射大大加速的“一锅法”过程以低载量的醋酸钯 (II) (0.2–1.0 mol-%) 进行,并已用于制备一系列衍生自芳族、杂芳族的加合物和脂肪醛以及甲醛。此外,还描述了对甲醛加合物的进一步阐述。该方法的适用性已通过首次合成传统中药的一种成分 Soulieotine 来确定。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)