One-Pot Synthesis of Conjugated (E)-Enynones via Two Types of Cross-Coupling Reaction
作者:Masayuki Hoshi、Hirokazu Yamazaki、Mitsuhiro Okimoto
DOI:10.1055/s-0030-1258563
日期:2010.10
(Trimethylsilyl)ethynyl bromide can be easily transformed into conjugated (E)-enynones, whose skeleton consists of consecutive carbonyl, ethynyl, and (E)-ethenyl units, via a one-pot multicomponent Suzuki-type reaction―Sonogashira reaction sequence. Thus, a three-component coupling of (trimethylsilyl)ethynyl bromide, (E)-alk-1-enyldisiamylborane and acid chloride is achieved in a two-step, one-pot
(三甲基甲硅烷基)乙炔基溴化物可以通过一锅多组分 Suzuki 型反应——Sonogashira 反应序列很容易地转化为共轭(E)-烯炔酮,其骨架由连续的羰基、乙炔基和(E)-乙烯基单元组成。因此,(三甲基甲硅烷基)乙炔基溴、(E)-alk-1-enyldisiamylborane 和酰氯的三组分偶联是通过两步、一锅法实现的,其中 (E)-alk-1-enyl基团作为亲核试剂安装在与溴原子相连的 sp-碳原子中,酰基作为亲电试剂安装在另一个 sp-碳原子中。