N-difluoromethylpyridinium salts is seldom explored because of their instability and low availability. Here we present a novel nucleophilic addition of N-difluoromethylpyridinium salts with nitroalkanes to synthesize N-CF2H-dihydropyridines and N-CHO-dihydropyridines in a highly efficient and regioselective pathway. This protocol exhibits good functional group tolerance and good to excellent yields.
由于N-二
氟甲基吡啶鎓盐的不稳定性和低可用性,因此很少对其进行研究。在这里,我们介绍了一种新型的N-二
氟甲基吡啶鎓盐与硝基烷的亲核加成,以高效且区域选择性的途径合成N -CF 2 H-
二氢吡啶和N -CHO-
二氢吡啶。该协议显示出良好的官能团耐受性和良好的优良率。