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ZrOCl2·8H2O/silica gel as a new efficient and a highly water–tolerant catalyst system for facile condensation of indoles with carbonyl compounds under solvent-free conditions

Carbonyl CompoundsChemical EngineeringEngineeringZrocl2·8h2o/silica GelCatalytic SynthesisOrganic ChemistrySolvent-free ConditionsCatalysisMolecular CatalysisChemistryCatalyst PreparationSol-gel Synthesis