Fluorocarbon derivatives of nitrogen. Part 11. Synthesis of some 2-(trifluoromethyl)imidazo[1,2-]pyridines from trifluoroacetonitrile
作者:Ronald Eric Banks、Julie Thomson
DOI:10.1016/s0022-1139(00)80977-x
日期:1984.12
3-(t-Butoxycarbonyl)-2-(trifluoromethyl)imidazo[1,2-]-pyridine, prepared from trifluoroacetonitrile and pyridinium t-butoxycarbonylmethylide, reacts smoothly with trifluoroacetic acid to provide 2-(trifluoromethyl)imidazo[1,2-]pyridine-3-carboxylic acid, which gives 2-(trifluoromethyl)imidazo[1,2-]-pyridine when heated. 3-Cyano-2-(trifluoromethyl)imidazo[1,2-]pyridine can be obtained treatment of
由三氟乙腈和吡啶鎓叔丁氧羰基甲基化物制得的3-(叔丁氧羰基)-2-(三氟甲基)咪唑并[1,2- ]-吡啶与三氟乙酸平稳反应,得到2-(三氟甲基)咪唑并[1,2-] ]吡啶-3-羧酸,加热后生成2-(三氟甲基)咪唑并[1,2- ]-吡啶。3-氰基-2-(三氟甲基)咪唑并[1,2- ]吡啶可以用氰基吡啶甲基吡啶处理三氟乙腈,该吡啶酮具有足够的反应性,可以在温和的条件下从五氟吡啶进行氟的亲核取代[→氰基吡啶鎓(四氟-4吡啶))。