A Sequential One-Pot Protocol for the Synthesis of Dihydrobenzo[6,7]indolo-[3′,4′:3,4,5]azepino[2,1-a]isoquinolines Using a Gold-Silver Combined Catalyst
摘要:
A sequential one-pot protocol for the synthesis of indole-based peri-annulated polyheterocycles using trifluoroacetic acid and a gold-silver combined catalyst system is described. The reaction is thought to proceed via an imine formation-cationic pi-cyclization-alkyne activation-intramolecular hydroamination sequence to yield novel dihydrobenzo[6,7]indolo[3',4':3,4,5]azepino[2,1-a]isoquinolines in good yields.