Gold(I)-Catalyzed Intramolecular Hydroamination of N-Allylic N′-Arylureas to form Imidazolidin-2-ones
作者:Hao Li、Feijie Song、Ross A. Widenhoefer
DOI:10.1002/adsc.201000844
日期:2011.4.18
Treatment of N‐allylic N′‐arylureas with a catalytic 1:1 mixture of di‐tert‐butyl‐o‐biphenylphoshphine gold(I) chloride and silver hexafluorophosphate (1 mol%) in chloroform at room temperature led to 5‐exo‐hydroamination to form the corresponding imidazolidin‐2‐ones in excellent yield. In the case of N‐allylic ureas that possessed an allylic alkyl, benzyloxymethyl, or acetoxymethyl substituent, gold(I)‐catalyzed