Abstract trans‐Enyne alcohols of the type R1C≡CCHCHCR2R3OH (R2 and R3 = H or alkyl) undergo cyclisation to substituted furans or dihydrofurans with potassium tert‐butoxide in dimethyl sulfoxide at 100° (if R1 = H) or at 25° (if R1 = CH3S or Ph).
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Schreurs et al. (1975) studied this question.
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