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- W1564497061 abstract "3-Acetyl-2-hydroxythiophene and 3-carbethoxy-2-hydroxythiophene have been prepared by acid-catalysed dealkylation of the corresponding t-butyl ethers at 160°. The t-butyl ethers were prepared via organometallic reagents derived from 3-bromo-2-t-butoxythiophene by metal-halogen interconversion with n-butyllithium at −70°. Investigations by NMR and IR spectroscopy show that these 2-hydroxythiophenes exist in the tautomeric hydroxy form in the pure liquid state and in solution. Evidence for the presence of the tautomeric α,β-unsaturated γ-thiolactone form in minute quantities is obtained from the formation of a dimer in the case of 3-carbethoxy-2-hydroxythiophene." @default.
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- W1564497061 date "1967-01-01" @default.
- W1564497061 modified "2023-10-16" @default.
- W1564497061 title "Thiophene chemistry—XII" @default.
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- W1564497061 doi "https://doi.org/10.1016/0040-4020(67)85035-x" @default.
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