-
公开(公告)号:US5436256A
公开(公告)日:1995-07-25
申请号:US157407
申请日:1993-11-26
IPC分类号: B01J31/04 , C07B61/00 , C07C275/16 , C07D233/74 , C07D233/76 , C07D233/78
CPC分类号: C07D233/76 , C07D233/74 , C07D233/78
摘要: Process for the preparation of 5-arylhydantoins by reaction of an allantoin acid alkyl ester with an aryl compound in a concentrated inorganic acid at temperatures from room temperature to 150.degree. C., with or without a phase transfer agent.
摘要翻译: 通过在室温至150℃的温度下在浓缩的无机酸中使尿囊素酸烷基酯与芳基化合物反应制备5-芳基乙内酰脲的方法,具有或不具有相转移剂。