Nucleophilic substitution approach towards 1,3-dimethylbarbituric acid derivatives—new synthetic routes and crystal structures
作者:Eyad Mallah、Kamal Sweidan、Jörn Engelmann、Manfred Steimann、Norbert Kuhn、Martin E. Maier
DOI:10.1016/j.tet.2011.11.093
日期:2012.1
We describe simple, convenient and high-yielding nucleophilicsubstitution reactions to synthesize new derivatives of 1,3-dimethylbarbituric acid (1a). Based on its active C5 position, condensing 1a with sulfuryl chloride gives the corresponding 5,5-dichloro-1,3-dimethylbarbituric acid (13). The latter was reacted with silver nitrite and potassium cyanide to afford 5-chloro-5-nitro-1,3-dimethylbarbituric
Preparation of Nitrogen Heterocycles of Spiro[Furo[2,3‐<i>d</i>]‐Pyrimidine]Pyrimidine Derivatives
作者:Branko S. Jursic、Edwin D. Stevens
DOI:10.1081/scc-200034786
日期:2004.12.31
Abstract The NMR evaluation of the reaction progression of the bromination of heterocyclic dibarbiturates was used to develop an efficient synthetic procedure for the preparation of heterocyclic spiro[furo]pyrimidines. The structure of one of these compounds was confirmed by X‐ray analysis.
摘要 杂环二巴比妥的溴化反应进程的 NMR 评估用于开发一种有效的合成方法,用于制备杂环螺[呋喃]嘧啶。其中一种化合物的结构通过 X 射线分析得到证实。