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■ 1-Methylimidazolium Trifluoroacetate Efficiently Catalyzed Three Component Synthesis of Diazaspiro[5.5]undecane-1,5,9-trione Derivatives under Solvent-Free Conditions

Zhaohui Xu,* Houfu Zhang, Chunhua Lin, and Deyong Liu

*College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330027, China

Abstract

A simple, green and efficient method for the synthesis of 2,4-dioxa- 8,10-diazaspiro[5.5]undecane-1,5,9-trione derivatives has been developed by the reaction of aromatic aldehydes with urea and 1,3-dioxane-4,6-dione catalyzed by 1-methylimidazolium trifluoroacetate under solvent-free conditions.