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Some pyridinium-based functionalized ionic liquids have been used as novel catalysts for the synthesis of 1,2-dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-one derivatives via the one-pot multi-component condensation of β-naphthol, aromatic aldehydes, and urea under solvent-free conditions, to afford good to excellent yields ranging from 76 to 91 % within 60 min. A possible mechanism to account for the...
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