The Reaction of Ethyl Alkylchloropyruvate with Sodiomalonate and Sodioacetoacetate
作者:Akira Takeda、Satosi Wada、Masatosi Fujii、Isao Nakasima、Shoiti Hirata
DOI:10.1246/bcsj.44.1342
日期:1971.5
alkylchloropyruvate (1) with sodiomalonate gave γ-alkyl-α,β-dialkoxycarbonyl-Δβ,γ-butenolide (2), which led to γ-ketocarboxylic acid (3). The reaction of 1 with sodioacetoacetate gave 2-alkyl-5-methylfuran-3,4-dicarboxylate (6) via the intermediate 2-alkyl-3-hydroxy-5-methyl-2,3-dihydrofuran-3,4-dicarboxylate (5). It has been shown unambiguously that the carbanions of both sodiomalonate and sodioacetoacetate
烷基氯丙酮酸 (1) 与钠丙二酸反应生成 γ-烷基-α,β-二烷氧基羰基-Δβ,γ-丁烯内酯 (2),进而生成 γ-酮羧酸 (3)。1 与乙酰乙酸钠反应通过中间体 2-烷基-3-羟基-5-甲基-2,3-二氢呋喃-3,4-二羧酸酯 (6) 得到 2-烷基-5-甲基呋喃-3,4-二羧酸酯 (6) 5)。已明确表明钠丙二酸酯和钠乙酰乙酸酯的碳负离子主要攻击 1 的羰基碳。