A modified synthetic route to 1,2,3‐butatrienyl ethers 3 is presented. It involves hydroxyalkylation of 2‐propynyl ethers with an aldehyde or a ketone, followed by trimethylsilylation of the hydroxy ether 1 and 1,4‐elimination of Me3SiOH from 2 with ethyllithium.
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Visser et al. (1981) studied this question.
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