A series of N-aryl β-bromodifluoromethyl β-enaminoketones were regioselectively synthesized in good yield by the reaction of N-aryl bromodifluoroacetimidoyl chlorides with methyl ketones. β-Bromodifluoromethyl β-enaminoketones smoothly cyclized to give a novel class of cyclic (2,2-difluoro-5-phenyl-furan-3-ylidene)-aryl-amines under basic condition. An intramolecular halophilic substitution mechanism
通过使N-芳基
溴二
氟乙
酰亚胺基
氯与甲基酮反应,以高产率区域选择性地合成了一系列N-芳基β-
溴二
氟甲基β-烯胺酮。β-
溴二
氟甲基β-烯胺酮在碱性条件下平稳环化,得到一类新型的环状(2,2-二
氟-5-苯基-
呋喃-3-亚烷基)-芳基胺。提出了分子内的嗜盐取代机制。