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
的治疗Ñ -烯丙基N'-与催化1 arylureas:二- 1混合物叔丁基- ø -biphenylphoshphine金(I)氯化物和银在氯仿六氟磷酸盐(1摩尔%)在室温下导致5-外型-加氢胺化以极好的收率形成相应的咪唑啉-2-酮。在的情况下Ñ其具有的烯丙基烷基,苄氧基甲基,乙酰氧基甲基或取代基,金(I) -烯丙基脲催化的5-外-hydroamination导致形成相应的反式在-3,4-二取代的咪唑烷-2-酮具有≥50:1 的非对映选择性的优异收率。