Lewis base catalyzed ring-expansion of isatin with 2,2,2-trifluorodiazoethane (CF3CHN2): An efficient route to 3-hydroxy-4-(trifluoromethyl)quinolinones
作者:Shuaipeng Lv、Yunfang Sun、Yue Xu、Shihai Yang、Lei Wang
DOI:10.1016/j.cclet.2019.11.027
日期:2020.6
Abstract A Lewis base catalyzed ring expansion of isatin with 2,2,2-trifluorodiazoethane (CF3CHN2) is developed. It is characterized that the merge of tetramethylethylenediamine and CF3CHN2 generates reactive triazene intermediates, which construct substituted 3-hydroxy-4-(trifluoromethyl)quinolinones with high efficiency. Synthetic application of the procedure is broadened by 3-trifluormethylpyrazole
摘要研究了2,2,2-三氟重氮乙烷(CF3CHN2)的路易斯碱催化的靛红环扩环。其特征在于四甲基乙二胺和CF 3 CHN 2的合并产生反应性三氮烯中间体,其高效地构建取代的3-羟基-4-(三氟甲基)喹啉酮。该方法的合成应用通过3-三氟甲基吡唑稠合的3-羟基-4-(三氟甲基)喹啉酮的合成而扩大。