A direct method to construct 2-oxazolines and 2-thiazolines from corresponding allylic amides and thioamides is reported. The redox-neutral intramolecular hydrofunctionalization is enabled by a dual catalyst system comprised of 9-mesityl-N-methyl acridinium tetrafluoroborate and phenyl disulphide and exhibits complete selectivity for the anti-Markovnikov regioisomeric products. The cyclization of allylic
报道了从相应的烯丙基酰胺和
硫代酰胺构建2-
恶唑啉和2-
噻唑啉的直接方法。氧化还原中性分子内氢官能化是通过由9-异
三甲苯基-
N-甲基吖啶鎓四
氟硼酸盐和二
硫化苯基组成的双催化剂系统实现的,并且对反马尔可夫尼科夫区域异构产物表现出完全选择性。假设烯丙基
硫代酰胺的环化是通过改进的机制进行的,其中
硫代酰胺的氧化而不是烯烃的氧化导致了观察到的反应性。