Phosphoric acid supported on alumina: A useful and effective heterogeneous catalyst in the preparation of α-amidoalkyl-β-naphthols, α-carbamato-alkyl-β-naphthols, and 2-arylbenzothiazoles
Keywords: H3PO4/Al2O3; α-Amidoalkyl-β-naphthols; α-Carbamato-alkyl-β-naphthols; 2-Arylbenzothiazoles; Heterogeneous catalyst;