oa South African Journal of Chemistry - Acidic Brønsted ionic liquids catalyzed the preparation of 1-((benzo[]thiazol-2-ylamino)(aryl)-methyl)naphthalen-2-ol derivatives 1-[(1,3-benzothiazol-2-ylamino)(aryl)methyl]-2-naphthol : research article



The acidic ionic liquids, triethylammonium hydrogen sulfate ([EtNH]HSO), 2-pyrrolidonium hydrogen sulfate ([Hnhp]HSO), 3-methyl-1-sulfonic acid imidazolium chloride ([Msim]Cl), and 1-methylimidazolium hydrogen sulfate ([Hmim]HSO) catalyzed three-component condensation reaction of aromatic aldehydes, 2-aminobenzothiazole, and β-naphthol to afford corresponding 1-((benzo[]thiazol-2-ylamino)(aryl)-methyl)naphthalen-2-ol derivatives. The inexpensive and non-toxic ionic liquids can be reused several times without noticeable loss of their activities.


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