Summary
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1.
The reaction of vinyl ethers with furan and with 2-methylfuran was studied under conditions under which vinyl ethers undergo diene condensation and also in presence of acid catalysts.
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2.
Under diene-synthesis conditions vinyl ethers do not react with furan and with 2-methylfuran, but in presence of acid catalysts substitutive addition occurs, leading to the addition of two molecules of 2-methylfuran or furan to the vinyl ether molecule and formation of 2,2′-ethylidenebis(5-methylfuran) and 2,2′-ethylidenedifuran.
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Shostakovskii, M.F., Bogdanova, A.V. & Volkov, A.N. Reaction of vinyl ethers with furan and with 2-methylfuran. Russ Chem Bull 11, 2125–2127 (1962). https://doi.org/10.1007/BF00911377
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DOI: https://doi.org/10.1007/BF00911377