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双乙烯酮(4-methylencoxetan-2-one)是一种廉价易得、活泼和高度功能基化的化合物,可用于向分子中引入含不同功能基的C_2、C_3和C_4单元,在染料、医药的合成,特别是在各种杂环化合物的合成中应用十分广泛。Micheli等曾报道用双烯酮与甲醛水溶液反应得到47％产率的α,δ-庚二酮,但直接以双烯酮与α,δ-不饱和醛酮反应制备α,δ-二羰基化合物尚未见到成功的报道。本文报道一种在相转移催化剂三乙
4-methylencoxetan-2-one is a cheap, readily available and highly functionalized compound that can be used to introduce C_2, C_3 and C_4 units with different functional groups into the molecule. In the synthesis of dyes and pharmaceuticals , Especially in the synthesis of various heterocyclic compounds is widely used. Micheli et al. Reported that the reaction of diketene with formalin afforded 47% yield of α, δ-heptanedione, but the direct reaction of diketene with α, δ-unsaturated aldehydes and ketones produced α, δ-dicarbonyl compounds No successful reports yet. This paper reports a phase transfer catalyst triethyl