Palladium catalyzed dual C–H functionalization of indoles with cyclic diaryliodoniums, an approach to ring fused carbazole derivatives

As the tile reaction shows, an array of dibenzocarbazoles were obtained via dual C–H functionalization of indoles with cyclic diaryliodoniums in a single operation.

Synthesis of carbazoles from ynamides by intramolecular dehydro Diels-Alder reactions

[reaction: see text]. A new approach to carbazoles and benzannulated carbazoles by means of intramolecular dehydro Diels-Alder reactions of ynamides is reported. By using this approach, carbazoles and benzo[b]-, tetrahydrobenzo[b]-, naphtho[1,2-b]-, naphtho[2,1-b]-, and dibenzo[a,c]carbazoles have been prepared in moderate-to-good yields.