Electrolysis at a platinum cathode of ethyl alk-2-ynoates in the presence of an excess of alkyl iodide in hexamethylphosphoramide or dimethylformamide solution containing tetra-n-butylammonium iodide gave the corresponding non-conjugated dialkylation products, ethyl 2,2-dialkylalk-3-ynoates, in good yield.
M. Tokuda and O. Nishio, J. Chem. Soc., Chem. Commun., 1980, 188 DOI: 10.1039/C39800000188
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