On the Ring-opening Reactions of the Furan Compounds. IV. The Condensation Products of Furfural with Methyl Propyl Ketone, Methyl Isopropyl Ketone and Pinacolin by Alkali
作者:Hiroshi Midorikawa
DOI:10.1246/bcsj.27.143
日期:1954.3
Methyl propyl ketone condensed with furfural by alkali both at the α-methyl and α-methylene groups of the ketone, giving 1-(2-furyl)-1-hexen-3-one (I) in a larger proportion and 3-ethyl-4-(2-furyl)-3-buten-2-one (II) in a much smaller proportion. The former furfurylidene ketone (I) gave γ, ζ-dioxocapric acid (III) on the ring-opening in alcoholic hydrochloric acid, and the latter (II) was oxidized
甲基丙基酮与糠醛在酮的α-甲基和α-亚甲基上通过碱缩合,得到较大比例的1-(2-呋喃基)-1-己烯-3-酮(I)和3-乙基-4-(2-furyl)-3-buten-2-one (II) 的比例要小得多。前者的糠基酮(I)在乙醇盐酸中开环生成γ,ζ-二氧癸酸(III),后者(II)被次氯酸钠氧化生成α-乙基-2-呋喃丙烯酸(IV) . 糠基甲基异丙基酮 (V) 和糠基甲基叔丁酮 (VI) 在盐酸醇中开环得到 γ, ζ-二氧代-η-甲基壬酸 (VII) 和 γ, ζ-二氧代-η, η-二甲基壬酸酸(VIII)。