A new structure is proposed, on the basis of spectroscopic and chemical evidence, for the yellow compound diethyl xanthophanic enol formed when ethyl sodioacetoacetate and ethyl ethoxymethyleneacetoacetate are heated together. A mechanism of formation is outlined and supported. The new information is used to prepare various compounds of the xanthyrone class and two of these, 3,3′,3′,5-tetra-acetyl
根据光谱和
化学证据,提出了一种新结构,该结构是将乙二
乙酸乙酸乙酯和
乙氧基亚甲基乙酰乙酸乙酯一起加热时形成的黄色化合物
二乙基黄体烯醇。概述并支持了形成机制。新的信息可用于制备各种an吨
酮类化合物,其中3,3',3',5-四乙酰基-6-
丙烯基-
α-吡喃酮和3'-乙酰基-3,3'中的两个5-三乙氧基羰基-6-
丙烯基-
α-吡喃酮使结构上的竞争者被打折。