An operationally simple procedure, involving conjugate addition
of NaI to β-(2-aminophenyl)-α,β-ynones/cyclization/Pd-catalyzed
reaction with 2-alkynyl-trifluoroacetanilides, afforded 4-(1H-indol-3-yl)quinolines. The whole process
was carried out in the same flask, without any intermediate work-up
and using ethanol as solvent.
annulation - palladium - quinolines - indoles - heterocycles - one-pot reaction