Microwave Assisted Synthesis of 1,5-Disubstituted Hydantoins and Thiohydantoins in Solvent-Free Conditions
作者:Satya Paul、Mukta Gupta、Rajive Gupta、André Loupy
DOI:10.1055/s-2002-19308
日期:——
1,5-Disubstituted hydantoins/thiohydantoins 3a-p have been synthesized in 8l-95% yield by a microwave-promoted solvent-free condensation of arylglyoxals 1 and phenylurea/thiourea 2 using PPE as a reaction mediator. This method can be extended towards the parallel synthesis of 3. The workup is simple and involves treatment with ice-cold water.
1,5-二取代乙内酰脲/硫代乙内酰脲 3a-p 通过使用 PPE 作为反应介质,通过微波促进的芳基乙二醛 1 和苯基脲/硫脲 2 的无溶剂缩合以 8l-95% 的收率合成。这种方法可以扩展到 3 的平行合成。后处理简单,涉及用冰冷的水处理。