Tandem Horner–Wadsworth–Emmons/Heck procedures for the preparation of 3-alkenyl-oxindoles: the synthesis of Semaxanib and GW441756
作者:Jana Lubkoll、Alessia Millemaggi、Alexis Perry、Richard J.K. Taylor
DOI:10.1016/j.tet.2010.03.018
日期:2010.8
developed to provide rapid access to 3-alkenyl-oxindoles from α-halo-anilides. This one-pot microwave accelerated process proceeds with catalytic palladium(II) acetate or tetrakis(triphenylphosphine)palladium, and has been used to prepare a range of adducts derived from aromatic, heteroaromatic and aliphatic aldehydes. The procedures can be used to prepare N-unprotected oxindoles directly and the applicability
已经开发了一个串联序列,涉及霍纳-沃兹沃思-埃蒙斯(HWE)烯化反应,然后进行钯催化的分子内Heck反应,以提供从α-卤代苯胺快速获得3-烯基-氧吲哚的途径。这种一锅微波加速方法是使用乙酸乙酸钯(II)或四(三苯基膦)钯催化的,已用于制备一系列衍生自芳族,杂芳族和脂族醛的加合物。该方法可用于直接制备N-未保护的羟吲哚,并且该方法的适用性通过一锅合成塞马克尼(一种血管生成信号抑制剂)和GW441756(一种氮杂-羟吲哚Trk A抑制剂)来建立。