Synthesis of Symmetrical Bisquinolonesvia Nickel(0)-Catalyzed Homocoupling of 4-Chloroquinolones
作者:Jamshed Hashim、C. Oliver Kappe
DOI:10.1002/adsc.200700081
日期:2007.10.8
preparation of functionalized 4,4′-bisquinolones using a microwave-assisted Ullmann-type homocoupling reaction is described. The method is catalytic in nickel(0) which is generated in situ by reduction from an inexpensive nickel(II) source and utilizes readily available 4-chloroquinolin-2(1H)-ones as starting materials. In contrast to the alternative palladium(0)-catalyzed one-pot borylation/Suzuki cross-coupling
描述了一种使用微波辅助的Ullmann型均偶联反应以克级制备官能化的4,4'-双喹诺酮的方法。该方法在镍(0)中具有催化作用,该镍是通过从廉价的镍(II)来源还原而原位生成的,并使用易于获得的4-氯喹啉-2(1 H)-一作为起始原料。与可替代的钯(0)催化的一锅硼化/ Suzuki交叉偶联反应相比,该新方法避免了使用昂贵的催化剂和交叉偶联伴侣,例如双(频哪醇)二硼。