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Paper | Regular issue | Vol 102, No. 10, 2021, pp.1969-1981
Published online, 27th July, 2021
DOI: 10.3987/COM-21-14504
Four-Component Synthesis of Functionalized 1,3,4-Oxadiazole Derivatives Bearing the 2-Amino benzothiazole Moiety

Milad Bazaz Rastkar, Bita Mohtat,* Gholam Bagheri Marandi, and Hoorieh Djahaniani

*Department of Chemistry, School of Sciences, Islamic Azad University Karaj Branch, Moazen St., Karaj 31485-313, Iran

Abstract

A one-pot sixteen derivatives of N-((5-(aryl)-4H-pyrazol-3-yl)(aryl)methyl)benzo[d]thiazol-2-amine (5a–p) were synthesized from 2-aminobezothiazole, aromatic aldehyde, N-isocyaniminotriphenylphosphorane on reaction with aryl carboxylic acid derivatives under a catalyst-free condition in CH2Cl2 by a Ugi-4CR/aza-Wittig cyclization at room temperature in fairly good yields. The newly synthesized compounds were confirmed and deduced based on IR, 1H NMR, 13C NMR, and mass spectroscopy, and elemental analysis.