Summary
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1.
The presence of an electronegative group conjugated with the furan nucleus in anα-side chain in a furan compound prevents its addition toα,β-unsaturated aldehydes and ketones in an acid medium, either by reaction at theα- or theβ-position of the furan ring.
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2.
4-(2-Furyl)-2-butanone, in which the carbonyl group is not conjugated with the furan nucleus adds in an acid medium to acrolein, crotonaldehyde, and mesityl oxide with formation, respectively, of 5-(3-oxobutyl)-2-furanpropionaldehyde,β-methyl-5-(3-oxobutyl)-2-furanpropionaldehyde, and 4,4-dimethyl-4-[5-(3-oxobutyl)-2-furyl]-2-butanone.
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Translated from Izvestiya Akademii Nauk SSSR, Seria Khimicheskaya, No. 10, pp. 1835–1838, October, 1964
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Glukhovtsev, V.G., Zakharova, S.V. Reaction of furan derivatives with α,β-unsaturated aldehydes and ketones. Russ Chem Bull 13, 1738–1740 (1964). https://doi.org/10.1007/BF00849439
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DOI: https://doi.org/10.1007/BF00849439