Divergent Reaction of Activated Pyridines with α,α-Difluorinated <i>gem</i>-Diols: Regioselective Synthesis of <i>gem</i>-Difluorinated Dihydropyridines and Dihydropyridones
作者:Koushik Patra、Mallu Kesava Reddy、Sumitava Mallik、Mahiuddin Baidya
DOI:10.1021/acs.orglett.2c01445
日期:2022.6.10
The nucleophilic reactivity of α,α-difluorinated gem-diols toward activated pyridinium salts has been capitalized in a highly regioselective fashion, offering biologically relevant 1,4-dihydropyridines and 3,4-dihydro-2-pyridones adorned with the valuable gem-difluoromethylene motif. The protocol is scalable as well as high yielding and accommodates a broad range of substrates and functional groups
α,α-二氟化偕二醇对活化的吡啶鎓盐的亲核反应性已以高度区域选择性的方式被资本化,提供了生物学相关的 1,4-二氢吡啶和 3,4-二氢-2-吡啶酮,并装饰有有价值的偕二氟亚甲基主题。该协议具有可扩展性和高产率,并适用于广泛的底物和功能组。此外,通过产品多样化展示了二氟化氧杂氮杂双环[3.3.1]壬烷骨架的合成。