The reaction of N-fluoropyridinium triflate with isonitriles in acetonitrile and propionitrile in the presence of NaBH(OAc)3 led to the formation of the corresponding imidazo[1,2-a]pyridines in 44–73% yields. The proposed reaction mechanism involves the intermediate formation of a highly reactive carbene species and apparent reduction of the pyridinium intermediate with NaBH(OAc)3 to yield the targeted
在NaBH(OAc)3存在下,
三氟甲磺酸N-
氟代
吡啶鎓与
乙腈和
丙腈中的异腈反应,以44-73%的收率形成相应的
咪唑并[1,2- a ]
吡啶。拟议的反应机理涉及高反应性卡宾物质的中间形成和
吡啶鎓中间体与NaBH(OAc)3的明显还原,从而生成目标杂环。