Elpiniki Chachlaki, D. Choquesillo-Lazarte, K. Demadis
Feb 1, 2022
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Abstract
This new triazole-functionalized phosphonic acid, PTEPHCl, was synthesized by the ‘click’ reaction of the alkyl azide diethyl-(2-azidoethyl)phosphonate with phenylacetylene to give the diethyl[2-(4-phenyl-1H-1,2,3-triazol-1-yl)ethyl]phosphonate ester, which was then hydrolyzed under acidic conditions (HCl) to give the ‘free’ phosphonic acid. The use of HCl for the hydrolysis caused protonation of the triazole ring, rendering the compound cationic, charged-balanced by a Cl− anion.