作者:N.K. Kochetkov、L.J. Kudryashov、B.P. Gottich
DOI:10.1016/0040-4020(61)80100-2
日期:1961.1
labile hydrogens results in the formation of complex mixtures. Ethyl malonate and ethyl acetoacetate have, however, been successfully ketovinylated. In the former case, α-carbethoxy-δ-keto-β,γ-unsaturated acids are produced in high yield and depending on the conditions of ketovinylation of ethyl acetoacetate either 4-alkyl salicyclic acids or polysubstituted benzene derivatives may be prepared. Further,
通常仅用一个不稳定的氢将酮乙烯基引入β-二羰基化合物中,但是存在两个不稳定的氢会导致形成复杂的混合物。然而,丙二酸乙酯和乙酰乙酸乙酯已被成功酮化。在前一种情况下,高产率地生产α-乙氧基-δ-酮基-β,γ-不饱和酸,并且根据乙酰乙酸乙酯的酮乙烯基化的条件,可以制备4-烷基水杨酸或多取代的苯衍生物。此外,丙二酸乙酯和乙酰乙酸烷基酯的酮乙烯基化产物可用于合成(1)不饱和脂族酮酸或二酮或(2)多种α-吡喃酮衍生物。提出了乙酰乙酸乙酯的酮乙烯基化机理,并提出了反式 建立了酮乙烯基化产品的构型。