Copper Salt of 12-Tungstophosphoric Acid: An Efficient and Reusable Heteropoly Acid for the Click Chemistry
作者:K. V. Purnima、D. Sreenu、N. Bhasker、K. Nagaiah、N. Lingaiah、B. V. Subba Reddy、J. S. Yadav
DOI:10.1002/cjoc.201200939
日期:2013.4
catalytic amount of copper‐exchanged phosphotungstic acid (Cu‐TPA) in the presence of triethyl amine in DMF to afford substituted triazoles in good yields with high selectivity. Interestingly, the coupling of alkyl azide with alkyne proceeds readily at room temperature to furnish 1,2,3‐triazoles in excellent yields. The catalyst can be recovered and reused for three to four subsequent runs with a minimal