Synthesis of 1,4-disubstituted-1,2,3-triazoles using starch-functionalized copper (II) acetate as a recyclable heterogeneous catalyst in water

摘要

Copper (II) acetate is covalently anchored onto the surface of chemically modified starch and the resultant heterogeneous catalyst was investigated for the regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles via Huisgen 1,3-dipolar cycloaddition reaction between terminal alkynes, benzyl/allyl/alkyl halides and NaN3 in distilled water at room temperature. Further, starch functionalized copper (II) acetate could be recovered by simple filtration and recycled up to several consecutive runs without loss of significant activity. The catalyst is characterized by FTIR, thermal analysis, XRD, SEM, TEM, and AAS.