The use of organolithium reagents for the synthesis of 4-aryl-2-phenylpyridines and their corresponding iridium(<scp>iii</scp>) complexes
作者:Ross Davidson、Yu-Ting Hsu、Thomas Batchelor、Dmitry Yufit、Andrew Beeby
DOI:10.1039/c6dt01461e
日期:——
pyridine and 4-mesityl-2-phenylpyridine. These ligands were coordinated to iridium to give the corresponding Ir(L)2(A) complexes (Ir1–7), where A = ancillary ligand acetylacetate or 2-picolinate. This was used to demonstrate that, through a combination of ancillary ligand choice and torsional twisting between the 4-aryl substituents of the ppy ligands, it is possible to tune the phosphorescent emission
据报道,从4-氧代哌啶-1-羧酸叔丁酯开始,合成4-芳基取代的苯基吡啶(ppy)的一种无钯的通用途径。与芳基锂反应,然后进行三氟乙酸脱水/脱保护,并与2-碘基苯甲酸氧化,最后进行苯基化,得到4个配体(L 1-4 H):2,4-二苯基吡啶,4-(4-甲氧基苯基)-2-苯基吡啶,2-苯基-4-(邻甲苯基)吡啶和4-间甲苯基-2-苯基吡啶。这些配体与铱配位得到相应的Ir(L)2(A)络合物(Ir1–7),其中A =辅助配体乙酰乙酸盐或2-吡啶甲酸。这用于证明,通过辅助配体选择和ppy配体的4-芳基取代基之间的扭转扭曲的组合,可以在502-560 nm的范围内调节复合物的磷光发射。