Microwave-Assisted One-Pot Synthesis of Pyrazolo[3,4-b]indoles and New Isoxazolo[5,4-b]indoles via Copper-Catalyzed Intramolecular C-N/C-O Bond Formation

Arepalli Sateesh Kumar, P. V. Amulya Rao & Rajagopal Nagarajan
A facile one-pot, two-step synthesis of highly substituted pyrazolo[3,4-b]indoles and isoxazolo[5,4-b]indoles was developed via microwave-assisted, copper-catalyzed intramolecular heterocyclization (involving C-N/C-O bond formation) from 3-acetyl-2-chloroindoles in good to excellent yields.