Novel preparation of 2,5-diarylpyrroles from aromatic nitriles with 3-arylpropylmagnesium bromides, 1,3-diiodo-5,5-dimethylhydantoin, and BuOK
作者:Momoko Nakamura、Kazuhiro Yoshida、Hideo Togo
DOI:10.1016/j.tet.2022.132709
日期:2022.4
Treatment of aromatic nitriles with 3-arylpropylmagnesium bromides under warming conditions and then water, followed by the reaction with DIH at room temperature under irradiation with a LED lamp and then with tBuOK gave 2,5-diarylpyrroles in moderate yields. The key step of the present method is the formation of N-iodo-2,5-diaryl-4,5-dihydropyrroles by the reaction of the formed imines with DIH, which
在加热条件下用 3-芳丙基溴化镁处理芳族腈,然后用水处理,然后在室温下在 LED 灯照射下与 DIH 反应,然后用t BuOK 反应,以中等收率得到 2,5-二芳基吡咯。本方法的关键步骤是通过形成的亚胺与 DIH 反应形成N -iodo-2,5-diaryl-4,5-dihydropyrroles,DIH 通过亚氨基自由基的 1,5-H 位移进行,亚胺基团的5-exo-tet环化,以及形成的 2,5-二芳基二氢吡咯的N-碘化。© 2022 爱思唯尔科学。版权所有。