Versatile Access to Benzhydryl-Phenylureas through an Unexpected Rearrangement during Microwave-Enhanced Synthesis of Hydantoins
作者:Giulio G. Muccioli、Johan Wouters、Jacques H. Poupaert、Bernadette Norberg、Wolfgang Poppitz、Gerhard K. E. Scriba、Didier M. Lambert
DOI:10.1021/ol035282x
日期:2003.10.1
A new access to benzhydryl-phenylureas is described. These new interesting urea derivatives were obtained by reaction of substituted benzils with substituted phenylureas under microwave irradiation. Phenylthiourea, when reacted with benzil, gave 3-phenyl-thiohydantoin. Moreover, benzylurea, as phenethylurea, gave the corresponding 3-substituted hydantoin derivatives, demonstrating that only phenylurea derivatives can result in benzhydryl-phenylureas under the applied conditions. This new reaction proved to be an easy access to substituted 1-benzhydryl-3-phenyl-ureas.