Two classes of 1,4-disubstituted 1,2,3-triazoles were synthesized using one-pot reaction of alpha-tosyloxy ketones/alpha-halo ketones, sodium azide, and terminal alkynes in the presence of aq PEG (1: 1, v/v) using the click chemistry approach and evaluated for Src kinase inhibitory activity. Structure-activity relationship analysis demonstrated that insertion of C6H5- and 4-CH3C6H4- at position 4 for both classes and less bulkier aromatic group at position 1 in class 1 contribute critically to the modest Src inhibition activity (IC50 = 32-43 mu M) of 1,4-disubstituted 1,2,3-triazoles. (c) 2010 Elsevier Ltd. All rights reserved.
Greener and Expeditious Synthesis of 1,4-Disubstituted 1,2,3-Triazoles from Terminal Acetylenes and in situ Generated α-Azido Ketones
作者:Dalip Kumar、Gautam Patel、V. Reddy
DOI:10.1055/s-0028-1087556
日期:2009.2
A convenient and mild protocol for the one-pot regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles in aqueous PEG 400 has been reported. The methodology involves the one-pot reaction ofa-bromo ketones, sodium azide, and terminal acetylenes catalyzed by Cu(I) in aqueous PEG 400 at room temperature. Prominent features of our approach are mild reaction conditions, use of readily available α-bromo