An efficient methodology taking advantage of the excellent nucleophilicity of aminoquinone to assemble the azaanthraquinone framework was developed via an iodine-induced 6-endo-dig electrophilic cyclization. Therefore, starting from N-propargylaminoquinones, various 3-iodo-1-azaanthraquinones were obtained in yields ranging from 45% to 90%. The metal-free protocol features facile installation of an iodine atom on the azaanthraquinone ring and benign functional group compatibility.
通过
碘诱导的 6-endo-dig 亲电环化,开发了一种利用
氨基醌优异的亲核性来组装氮杂
蒽醌框架的有效方法。因此,从N-炔丙基
氨基醌出发,得到了各种3-
碘-1-氮杂
蒽醌,产率在45%至90%之间。无
金属协议的特点是在氮杂
蒽醌环上易于安装
碘原子以及良好的官能团兼容性。