One-pot New Barbituric Acid Derivatives Derived from the Reaction of Barbituric Acids with BrCN and Ketones
作者:Yaser Hosseini、Saeed Rastgar、Zerrin Heren、Orhan Büyükgüngörc、Nader Noroozi Pesyan
DOI:10.1002/jccs.201190031
日期:2011.6
dimensional NMR, FT‐IR spectra, mass spectrometry and elemental analysis. The mechanism of product formation is discussed. The reaction of DMBA with cyanogen bromide in the presence of triethylamine also afforded trimeric form of barbiturate of uracil derivatives in good yield. The reaction of selected acyclic β‐dicarbonyl compounds with cyanogen bromide in the presence of triethylamine in acetone and/or diethyl
环状β-二羰基化合物的反应,例如嘧啶-(1 H,3 H,5 H)-2,4,6-三酮(BA),1,3-二甲基嘧啶-(1 H,3 H,5 H) -2,4,6-三酮(DMBA)和2-硫代-嘧啶-(1 H,3 H,5 H)-4,6-二酮(TBA)与溴化氰一起在丙酮和2-丁酮中存在得到的三乙胺一类新的稳定的杂环螺[呋喃并[2,3-的d ]嘧啶-6,5'-嘧啶] 2,2',4,4',6'(3 ħ,3' ħ,5 ħ戊酮(巴比妥酸盐的二聚体形式)在0°C和环境温度下。通过X射线晶体学,1 H NMR,13 C NMR,二维NMR,FT-IR光谱,质谱和元素分析对结构进行阐明。讨论了产品形成的机理。在三乙胺的存在下,DMBA与溴化氰的反应也以高收率得到了尿嘧啶衍生物的巴比妥酸酯的三聚体形式。在相同条件下,还研究了选定的无环β-二羰基化合物与溴化氰在三乙胺存在下在丙酮和/或二乙醚中的反应。丙二酸二乙酯和氰基乙