2-(2-Haloalkenyl)-aryl Halides as Substrates for Palladium-Catalysed Tandem CN Bond Formation: Efficient Synthesis of 1-Substituted Indoles
作者:Michael C. Willis、Gareth N. Brace、Thomas J. K. Findlay、Ian P. Holmes
DOI:10.1002/adsc.200505484
日期:2006.5
2-(2-Haloalkenyl)-aryl halides, conveniently prepared in a single step from the corresponding o-halobenzaldehydes, are combined with amines under Pd catalysis to provide 1-substituted indoles. All combinations of Br and Cl leaving groups can be employed, and a range of substituents on the arene, alkene and amine, can all be tolerated. The use of 1,3-dichloro-substituted arenes allows a third amination
由一步法从相应的邻卤代苯甲醛方便地制备的2-(2-卤代烯基)-芳基卤化物在Pd催化下与胺结合,得到1-取代的吲哚。可以使用Br和Cl离去基团的所有组合,并且芳烃,烯烃和胺上的一系列取代基都可以被接受。使用1,3-二氯取代的芳烃可以进行第三次胺化过程。这些三组分方法以良好的产率提供了相应的4-氨基吲哚。