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18. General procedure for the synthesis of 4-Aryl-1H-1,2,3-
triazoles (Scheme 4): The aldehyde (1 mmol), NaN3 (1.2 mmol),
CH3NO2 (1.5 mmol), CuFe2O4 (5 mol%) and DMSO (3 mL) were
taken in a round bottomed flask fitted with a reflux condenser and
exposed to microwave irradiation (700 W) using a monomode
microwave synthesizer by Raga’s Scientific Microwave Synthesis
System for a specified time (Table 2). After the completion of the
reaction (monitored by TLC), magnetically active CuFe2O4
particles were removed using a bar magnet. DMSO was distilled
off under vacuum, product was dissolved in Ethyl acetate, washed
with water, treated with brine and then the organic layer was dried
over anhydrous Na2SO4. The crude product was obtained by
evaporating the Ethyl acetate and then purified by column
chromatography using silica gel (100-200 mesh) as adsorbent and
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