2-isocyanobiphenyls react with aromatic aldehydes via base promoted homolytic aromatic substitution (BHAS) to give 6-aroylated phenanthridines. Reactions occur via addition of acyl radicals to the isonitrile functionality and subsequent intramolecular BHAS of the intermediate imidoyl radicals. Initiation of the radical chain reaction is best achieved with small amounts of FeCl3 (0.4 mol %), and the commercially
易于获得的
2-异氰基联苯通过碱促进的均相芳族取代(
BHAS)与芳族醛反应,生成6-芳基化
菲啶。反应是通过将酰基基团加到异腈官能团上,以及随后的中间体亚
氨基基团的分子内
BHAS发生的。自由基链反应的引发最好用少量的FeCl 3(0.4 mol%)来实现,并且使用市售的廉价t BuOOH作为氧化剂。