作者:Feng, Yang、Wu, Yuanyuan、Yue, Zengjiang、Fu, Ying、Du, Zhengyin
DOI:10.1039/d4nj02150a
日期:——
2-fluoropyrazolo[1,5-a]pyridines through base-promoted [3+2] cycloaddition of N-aminopyridinium salts with gem-difluorostyrenes has been established. A range of N-heterocycles with 2-fluorinated pyrazo[1,5-a]pyridines were efficiently obtained in moderate to good yields. The impact of different substituents on the reaction was discussed in detail. The protocol shows great potential for the synthesis of valuable
建立了通过N-氨基吡啶鎓盐与偕二氟苯乙烯的碱促进[3+2]环加成反应构建2-氟吡唑并[1,5-a]吡啶的方法。以中等至良好的收率有效地获得了一系列具有 2-氟化吡唑[1,5-a]吡啶的 N-杂环。详细讨论了不同取代基对反应的影响。该方案显示了利用宝石二氟苯乙烯作为含氟结构单元合成有价值的氟化化合物的巨大潜力。