assistance of bases. Varieties of α-polyfluoroarylanilines were selectively produced with this protocol from polyfluoroarenes and N-alkylanilines, including natural products and pharmaceutical molecule derivatives. Mechanistic studies illustrated base-promoted photochemical C–H cleavage of the α-C–H bonds of alkylanilines to produce the N-α-carbon radical and then radical addition to polyfluoroarenes.
亲核仲烷基苯胺与多氟芳烃的直接和选择性氟芳基化首先通过可见光诱导的 C-H/C-F 偶联在碱的帮助下实现。利用该方案从多氟芳烃和N-烷基苯胺中选择性生产各种α-多氟芳基苯胺,包括天然产物和药物分子衍生物。机理研究表明,碱促进烷基苯胺的 α-C-H 键发生光化学 C-H 断裂,产生 N - α-碳自由基,然后自由基加成到多氟芳烃上。
Observations on the vilsmeier reaction Part 2. The anomalaus reaction of N-benzyl N-cyanoethyl-4-methylaniline derivatives
作者:Andrew P. Shawcross、Stephen P. Stanforth
DOI:10.1016/s0040-4020(01)89174-2
日期:——
The reaction of a series of the title anilines (1) with variously substituted benzyl groups under Vilsmeier conditions was investigated. Only perfluorobenzyl derivatives showed normal formylation while other fluoro derivatives gave mixed results and other substituents gave solely the anomalous amine (5) together with the aldehyde (6) derived from the benzyl group.