We report an efficient and entirely green procedure for preparation of 1-(benzothiazolylamino)methyl-2-naphthol derivatives involving multi-component, one-pot condensation reaction of 2-naphthol, 2-aminobenzothiazole, and aromatic aldehydes in the presence of maltose under solvent-free conditions. This method has several advantages, including mild conditions, high yields, clean reaction profile, simple operation, and environmentally benign and simple work-up procedures.
NaHSO<sub>4</sub>.H<sub>2</sub>O Catalyzed Multicomponent Synthesis of 1-(Benzothiazolylamino) Methyl-2-Naphthols Under Solvent-Free Conditions
作者:Asghar Hosseinian、Hamid Reza Shaterian
DOI:10.1080/10426507.2012.664221
日期:2012.9.1
A one-pot, efficient three-component condensation of aldehydes, 2-naphthol, and 2-aminobenzothiazole in the presence of sodium hydrogen sulfate as an effective catalyst for the synthesis of 1-(benzothiazolylamino)methyl-2-naphthol derivatives under thermal and solvent-free conditions is described. These products involve two biologically active parts, Betti's base and benzothiazole. The present methodology offers several advantages, such as good yields, short reaction times, and easy work-up.