Preparation of Substituted Imidazolidinones and Hydantoins by Ring-Expansion of Aziridinones
作者:Erach Talaty、Mashitah Yusoff、S. Ismail、Jaime Gomez、Charles Keller、Jean Younger
DOI:10.1055/s-1997-3256
日期:1997.6
Reaction of 1,3-di-tert-butylaziridinone and other di-tert-alkylaziridinones with cyanamides produces an imidazolidinone (3 or 6) bearing the tert-alkyl substituents at positions 1 and 5 only, by selective cleavage of the acyl-nitrogen bond. Treatment of the product from the unsubstituted cyanamide (3) with HNO2 furnishes the corresponding hydantoin (5), whereas treatment with alkyl halides and base affords another imidazolidinone (7).
1,3-二叔丁基氮丙啶酮和其他二叔烷基氮丙啶酮与氰酰胺反应,通过选择性断裂酰基氮键,生成仅在1和5位带有叔烷基取代基的咪唑烷酮(3或6)。用HNO2处理未取代的氰酰胺(3)生成相应的乙内酰脲(5),而用烷基卤化物和碱处理则生成另一种咪唑烷酮(7)。