[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.
Syntheses of indoles and quinolines based upon the Pauson-Khand reaction is described. The starting materials are an aromatic ethynylenamine and ethynylallylamine, which are obtained via Sonogashira coupling. Also. an aromatic ynamine is used for an attempt to synthesize indole.