Abstract
The carboxylative coupling of aryl/alkyl terminal alkynes, CO2 and benzyl halides was investigated using silver iodide as the catalyst and Cs2CO3 as the base in CH3CN under ligand-free conditions. This reaction protocol shows a wide substrate scope and high functional group tolerance ability for benzyl halides, in which various functionalized benzyl 2-alkynoates were achieved in good yields. This one-pot, ligand-free and CH3CN mediated reaction proved to be easy to handle and could be facilitated under atmospheric CO2 pressure.
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