Worth diene for: The butadienylphosphine L (see scheme), obtained on a large scale from a new synthetic method, is an efficient ligand in Ullmann‐type copper‐catalyzed arylation reactions. The use of this phosphorus ligand made it possible to follow the reaction by 31P NMR spectroscopy and thus to propose a mechanism for the Ullmann reaction.
值得二烯使用的:丁二烯膦L(参见方案)是通过一种新的合成方法大规模获得的,是Ullmann型铜催化的芳基化反应中的有效配体。通过使用该磷配体,可以通过31 P NMR光谱追踪反应,从而提出乌尔曼反应的机理。