An efficient and direct procedure for the synthesis of amidoalkyl naphthols has been described that employs a three-component condensation reaction in one pot using aromatic aldehydes, b-naphthol and ureas or amides in the presence of p-toluene sulfonic acid in 1,2-dichloroethane at room temperature or under solventfree conditions at elevated temperature.

Sulfanilic acid-functionalized silica-coated magnetite nanoparticles as an efficient, reusable and magnetically separable catalyst for the solvent-free synthesis of 1-amido- and 1-aminoalkyl-2-naphthols.

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