AbstractRh(III)‐catalyzed cascade oxidative C−H functionalization/aza‐annulation of indole and pyrrole‐N‐carboxamides with 1,3‐enynes involving 1,4‐rhodium migration is disclosed. This [4+1] annulation protocol provides an approach for the synthesis of imidazo[1,5‐a]indol‐3(2H)‐ones from easily accessible substrates. Moreover, sulfonamides are also found to be well compatible in this method, leading to the corresponding benzo[d]sultams. The efficacy of this protocol is highlighted by handy downstream conversions of the dienyl‐sultam.
摘要 揭示了 1,4-
铑迁移催化的
吲哚和
吡咯-N-羧酰胺与 1,3-烯炔的级联氧化 C-H 功能化/氮
茚化反应。这种 [4+1] 环化协议为从容易获得的底物合成
咪唑并[1,5-a]
吲哚-3(2H)-酮提供了一种方法。此外,还发现磺
酰胺类化合物也能很好地与这种方法兼容,从而得到相应的苯并[d]舒坦类化合物。
二烯丙基舒坦的下游转化过程非常简便,这凸显了该方法的有效性。