Facile, efficient and one-pot access to diverse new functionalized aminoalkyl and amidoalkyl naphthol scaffolds via green multicomponent reaction using triethylammonium hydrogen sulfate ([Et3NH][HSO4]) as an acidic ionic liquid under solvent-free conditions

  • Elahe Hadadianpour
  • Behjat PouramiriEmail author
Original Article


An efficient, clean and one-pot multicomponent synthesis of divers kind of new functionalized aminoalkyl naphthol and amidoalkyl naphthol derivatives via tandem condensation reaction of 2-naphthol, aromatic aldehydes and 5-methyl-1,3,4-thiadiazol-2-amine/5-aryl-1,3,4-thiadiazol-2-amines urea/acetamide under solvent-free conditions is reported. Following this protocol, it was possible to synthesize novel 1-(((5-methyl-1,3,4-thiadiazol-2-yl)amino)(aryl)methyl)naphthalen-2-ol, 1-(aryl((5-aryl-1,3,4-thiadiazol-2-yl)amino)methyl)naphthalen-2-ol and amidoalkyl naphthol derivatives. This protocol includes some salient features, such as the use of triethylammonium hydrogen sulfate ([Et3NH][HSO4]) ionic liquid as a green, clean and reusable catalyst, no column chromatographic separation, high atom economy, good yields, low cost and finally no need for a complex procedure.

Graphical abstract


1-Aminoalkyl-2-naphthol Multicomponent reaction (MCRs) Green synthesis No column chromatography Solvent-free conditions 



The authors express appreciation to the Kerman University of Medical Sciences (Grant No. 21252) and the Jiroft University of Medical Sciences Faculty Research Committee for their supports of this investigation.

Supplementary material

11030_2019_9945_MOESM1_ESM.docx (15.5 mb)
Supplementary material 1 (DOCX 15900 kb)


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Authors and Affiliations

  1. 1.Faculty of PharmacyKerman University of Medical ScienceKermanIran
  2. 2.Faculty of MedicineJiroft University of Medical SciencesJiroftIran

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