α-Carboline derivatives: A novel and one-pot, three-component synthesis of indolopyrazolopyridines

A novel, one-pot and three-component synthesis of new 1H-indolo[2,3-b]pyrazolo[4,3-e]pyridine derivatives by cyclo-condensation reaction of indolin-2-one, aromatic aldehydes and amino-pyrazoles in excellent yields in ionic liquid 1-butyl-3-methylimidazolium bromide ([bmim]Br) as solvent is reported. All products were characterized by IR, 1H NMR, 13C NMR and Elemental analysis

کلیدواژه ها:

Indolin-2-one ، Aldehyde ، Pyrazole ، Indolopyrazolopyridine ، Carboline