An Economical and Green Synthesis of Spiro[diindeno [1,2- b:2,1-e]pyridine-11,3-indoline]-trione Derivatives through Multi-Component Reaction by Br¢nsted Acidic Ionic Liquid Catalyst

Abstract

Synthesis of spiro[diindenopyridine-indoline]-triones by one-pot condensation of 1,3-indandione, isatin and aniline by Brønsted acid ionic liquid (BAIL),1-(4-sulfonicacid)butyl-3-methylimidazolium hydrogen sulfate ([(CH₂)₄SO₃HMIM][HSO₄]), as reusable and an economical catalyst in water under reflux condition.

Keywords

• Water
• Ionic liquid
• Isatin
• Aniline
• 1,3-indandione

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