Finally, with propargyl ether 17 in hands, the triazole
18 was synthesized via copper-catalyzed click chemistry, in which
sodium ascorbate and copper sulfate in DMSO were treated with
azidoacetate prepared in situ by the reaction of t-butyl bromoacetate
and sodium azide. This developed synthetic process would be
a very useful tool for a future chemical biology research to reveal
a-mangostin’s target protein and its biological significance.