Efficient construction of 3-arylquinolin-4(1 H )-ones via in situ Meinwald rearrangement/intramolecular reductive cyclization of 2′-nitrochalcone epoxides
作者:Sheng Wang、Chao Zhao、Ting Liu、Lifang Yu、Fan Yang、Jie Tang
DOI:10.1016/j.tet.2016.09.039
日期:2016.11
An efficient method for construction of 3-arylquinolin-4(1H)-ones via in situ Meinwald rearrangement/intramolecular reductive cyclization of 2′-nitrochalcone epoxides has been developed. The practical approach is of excellent functional groups compatibility with as high as 98% yield under mild reaction conditions. Trapping and NMR analysis about the key intermediates of the transformation provided
通过原位Meinwald重排/分子内2'-硝基查尔酮环氧化物还原环化反应,构建3-芳基喹啉-4(1 H)-ones的一种有效方法已得到开发。实用的方法是在温和的反应条件下具有优异的官能团相容性,且产率高达98%。有关转化关键中间体的捕获和NMR分析为提出分子内还原环化的合理机理提供了见识。此外,进一步的衍生成功地提供了羟基取代的和N-甲基取代的衍生物,这可能在探索3-芳基喹啉-4(1H)-一的生物活性化合物中提供有希望的潜在应用。