Affiliation:
1. Department of Organic Synthesis and Process Chemistry CSIR-Indian Institute of Chemical Technology Hyderabad 500007 India
2. Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
Abstract
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.