development of novel luminescentiridium(III) complexes with highly tunable emission energy and versatile applications is of particular importance. In this Communication, a series of luminescentiridium(III) complexes supported by chromophoric pyridinium-derived N-heterocyclic carbene (NHC) ligands that display tunable emission from 516 to 682 nm were prepared. These complexes can be used as photocatalysts
Mechanistic Approach Toward the C4‐Selective Amination of Pyridines via Nucleophilic Substitution of Hydrogen
作者:Hoonchul Choi、Won Seok Ham、Pit van Bonn、Jianbo Zhang、Dongwook Kim、Sukbok Chang
DOI:10.1002/anie.202401388
日期:2024.6.10
Tailored pyridine reagents undergo nucleophilicsubstitution of hydrogen (SNH) reactions with activated pyridines to afford pyridyl pyridinium salts in C4-selectivity. These salts can be in situ converted to 4-aminopyridines by aqueous ammonia or utilized as synthetic linchpins for general pyridine C4-functionalization. The elucidation of the selectivity principles has further guided the C4-selective
定制的吡啶试剂与活化的吡啶发生氢的亲核取代 (S N H) 反应,得到具有 C4 选择性的吡啶基吡啶鎓盐。这些盐可以通过氨水原位转化为 4-氨基吡啶,或用作一般吡啶 C4 官能化的合成关键。选择性原理的阐明进一步指导了其他(二)嗪的C4选择性官能化。