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Mohammadi, E., Movassagh, B., & Navidi, M. (2014). Palladium- and Solvent-Free Synthesis of Ynones by Copper(I)-Catalyzed Acylation of Terminal Alkynes with Acyl Chlorides under Aerobic Conditions. Helvetica Chimica Acta, 97(1), 70–75. doi:10.1002/hlca.201300023 
10.1002/hlca.201300023