Palladium(II) ion promoted hydroamination of di(phenylethynyl)phenylphosphine and aniline: a facile synthesis of a six-membered P–N heterocycle
作者:Xueming Liu、Terence K.W Ong、S Selvaratnam、Jagadese J Vittal、Andrew J.P White、David J Williams、Pak-Hing Leung
DOI:10.1016/s0022-328x(01)01074-9
日期:2002.2
formed. The end product of the cyclization reaction is a palladium complex in which the six-membered aromatic P–N heterocyclic ring is coordinated to the metal center as a typical monodentate ligand via phosphorus. The azaphospha heterocycle can subsequently be liberated from the palladium reaction activator as an air-stable yellow solid by treating the palladium complex with KCN. In contrast to the intermediate
通过[PdCl 2(NCMe)2 ]促进PhP(CCPh)2之间的加氢胺化反应,高效生成了六元芳香族杂环1,4-2H-1,2,4,6-四苯基-1,4-氮杂磷苯和苯胺。杂环反应采用逐步机理,在此过程中不稳定的中间体亚氨基配合物顺式形成了-二氯1,2-二苯基-3-苯基(苯基乙炔基)膦基-1-氮杂-1-丙烯}钯(II)。环化反应的最终产物是钯配合物,其中六元芳族PN杂环通过磷与金属中心配位,成为典型的单齿配体。随后可以通过用KCN处理钯配合物,从钯反应活化剂中释放出氮杂磷杂环化合物,作为空气稳定的黄色固体。与中间体亚氨基络合物(C intermediateN易于被HCl水解)相反,芳族杂环在强酸性环境中是稳定的。