An easy synthetic method for the preparation of pyrazine-2,3-dicarbonitrile 5,6-bis-substituted derivatives using Pd-catalyzed cross coupling reaction (Sonogashira, Suzuki, Heck) is described. The reaction conditions allow preparing symmetrical and unsymmetrical bis-substituted products in moderate to high yields, as precursors for the preparation of highly substituted symmetrical and non-symmetrical
描述了一种简单的合成方法,该方法使用Pd催化的交叉偶联反应(Sonogashira,Suzuki,Heck)制备
吡嗪2,3-二腈5,6-双取代衍
生物。反应条件允许以中等至高产率制备对称和不对称的双取代产物,作为制备具有明确光谱特性的高度取代的对称和非对称氮杂
酞菁的前体。