In several recent communications1~ 2~ 3 from our laboratories it has been reported that alkyl acetylenes react with organic oxy compounds, in the presence of small amounts of boron fluoride and mercuric oxide, to form addition compounds. Methyl alcohol and glycol thus yield ketone acetals and the simple organic acids form alkenyl esters. The reaction leading to alkenyl esters has now been studied in greater detail and esters have been ...