10.1021/ol026050l.s001 Mieko Arisawa Mieko Arisawa Ryo Amemiya Ryo Amemiya Masahiko Yamaguchi Masahiko Yamaguchi One-Step Ethynylation of Silyl Enol Ether with Chlorosilylethyne American Chemical Society 2002 presence GaCl 3 Chlorosilylethyne proton ethynylated acidic silyl enol ethers chlorotrimethylsilylethyne Ethynylation Silyl Enol Ether allenyl ketones aryl isomerization 2002-06-06 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/One-Step_Ethynylation_of_Silyl_Enol_Ether_with_Chlorosilylethyne/3742968 In the presence of GaCl<sub>3</sub>, silyl enol ethers are ethynylated at the α-carbon atom with chlorotrimethylsilylethyne. This reaction can provide α-ethynylated aryl ketones possessing acidic α-protons without isomerization to conjugated allenyl ketones.