Synthesis of furan and dihydrofuran derivatives via Feist–Benary reaction in the presence of ammonium acetate in aqueous ethanol
作者:Maryam Ghazvini、Ashraf Sadat Shahvelayati、Ali Sabri、Fatemeh Zeinali Nasrabadi
DOI:10.1007/s10593-016-1854-2
日期:2016.3
An efficient synthesis of dihydrofurans and furans by a reaction between 1,3-dicarbonyl compounds and ethyl bromopyruvate, ethyl 2-chloroacetoacetate, or 3-chloroacetylacetone in the presence of ammonium acetate in aqueous ethanol is described. When the reaction was performed with a phenacyl bromide, O-alkylation of 1,3-dicarbonyl compounds occurred without cyclization.
描述了在乙酸铵的存在下,在乙醇水溶液中,通过1,3-二羰基化合物与溴丙酮酸乙酯,2-氯乙酰乙酸乙酯或3-氯乙酰丙酮之间的反应有效合成二氢呋喃和呋喃。当用苯甲酰溴进行反应时,发生1,3-二羰基化合物的O-烷基化而没有环化。