作者:Kerry‐Ann Green、Paul T. Maragh、Kamaluddin Abdur‐Rashid、Alan J. Lough、Tara P. Dasgupta
DOI:10.1002/ejic.201402317
日期:2014.8
Alternative procedures are reported for the preparation of PEPPSI-type palladium complexes (PEPPSI = pyridine-enhanced precatalyst preparation stabilization and initiation) in good to excellent yields. One method involves the reaction of [(NHC)Pd(acac)Cl] complexes (NHC = N-heterocyclic carbene, acac = acetylacetonate) with hydrohalides (HX; X = Cl, Br, I) of pyridine or 2,6-lutidine. Two other one-pot
报道了用于制备 PEPPSI 型钯配合物(PEPPSI = 吡啶增强的预催化剂制备稳定和引发)的替代程序,收率良好至极好。一种方法涉及 [(NHC)Pd(acac)Cl] 配合物(NHC = N-杂环卡宾,acac = 乙酰丙酮化物)与吡啶或 2,6-二甲基吡啶的氢卤化物(HX;X = Cl、Br、I)的反应. 另外两种一锅法合成涉及 Pd(acac)2、唑盐和吡啶氢卤化物(或 2,6-二甲基吡啶氢卤化物)。复合物以湿气和空气稳定的固体形式获得,并通过 1 H 和 13 C NMR 光谱、CHN 分析和红外光谱表征。讨论了各种合成程序和所需产品的产率。[1-(2,6-二异丙基苯基)-3-(2,4,