The use of a recyclable silica-supported palladium catalyst in Sonogashira couplings and indole syntheses using a range of functionalised substrates is described. The catalyst is shown to be both robust and versatile, effecting the synthesis of 2-phenylindole in quantitative yield without the need for N-protection, a copper cocatalyst, a base, or a solvent.
文章描述了在Sonogashira偶联反应和使用多种功能化底物的
吲哚合成中,应用一种可回收的
二氧化硅负载
钯催化剂的情况。该催化剂表现出既坚固又多才多艺的特性,在无需N-保护、
铜助催化剂、碱或溶剂的情况下,能够以定量产率合成
2-苯基吲哚。