Synthesis of trifluoroethoxy/aryloxy cinnolines, cinnolinones and indazoles from <i>o</i>-alkynylanilines <i>via</i> metal-free diazotization reagent
作者:Madan Kumar、Avijit Goswami
DOI:10.1039/d4ob00058g
日期:——
and user-friendly protocol for the synthesis of trifluoroethoxy/aryloxy cinnolines, cinnolinones and indazoles from o-alkynylaniline in good-to-excellent yields has been developed using a metal-free diazotization reagent (a combination of BF3·OEt2 and TBN). The methodology has been further extended to construct bis-cinnolinones and for the chemoselective synthesis of N-propargylated cinnolinones.