A transition metal-free route to 3-halopiperidines and 2-halomethylpiperidines was described. In the presence of iodine, potassium persulfate and a suitable halogen source, intramolecular haloamination of 4-penten-1-amines and 5-hexen-1-amines proceeded readily, leading to the corresponding substituted piperidines in good isolated yields.
该研究描述了制备 3-卤代
哌啶和 2-卤甲基
哌啶的无过渡
金属路线。在
碘、过
硫酸钾和合适的卤素源存在下,4-
戊烯-1-胺和 5-己烯-1-胺的分子内卤化反应很容易进行,从而以良好的分离产率得到相应的取代
哌啶。