Abstract
Abstract From the condensation product of furfural with methyl ethyl ketone by aqueous sodium hydroxide were isolated 4-(2-furyl)-3-methyl-3-buten-2-one (I) and 1-(2-furyl)-1-penten-3-one (II). The former ketone (I) was oxidised by sodium hypochlorite to yield α-methyl-2-furanacrylic acid, (III) but gave no γ, ζ-dioxo-ε-methylcaprylic acid by refluxion with alcoholic hydrochloric acid. The latter ketone (II) gave γ, ζ-dioxopelargonic acid (IV) by refluxion with alcoholic hydrochloric acid, but was no acted upon by sodium hypochlorite. The semicarbazone of 1-(2-furyl)-1-penten-3-one (II) existed in two forms of the needle crystals melting at 183∼184° and the tabular crystals melting at 166∼167°.
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