A series of electronically diverse imines were found to readily react with various donor–acceptor cyclopropyl acid chlorides, with complete regioselectivity, to form 1,3-oxazin-4-ones in moderate yields (25–48% over two steps). Select oxazinones underwent a base induced rearrangement to afford the corresponding cycloheptene-fused oxazinones in good yields (up to 70%).
发现一系列电子多样的
亚胺可以很容易地与各种供体-受体环丙基酰
氯反应,并具有完全的区域选择性,从而以中等收率(分两步产生25-48%)形成1,3-恶嗪-4-酮。选定的恶嗪酮经过碱诱导的重排,以良好的产率(高达70%)得到相应的
环庚烯融合的恶嗪酮。