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.
1-Benzhydryl-3-phenylurea and 1-Benzhydryl-3-phenylthiourea Derivatives: New Templates among the CB<sub>1</sub> Cannabinoid Receptor Inverse Agonists
作者:Giulio G. Muccioli、Johan Wouters、Gerhard K. E. Scriba、Wolfgang Poppitz、Jacques H. Poupaert、Didier M. Lambert
DOI:10.1021/jm0503906
日期:2005.11.1
New 1-benzhydryl-3-phenylurea derivatives and their 1-benzhydryl-3-phenylthiourea isosteres were synthesized and evaluated for their human CB1 and CB2 cannabinoid receptor affinity. These compounds proved to be selective CB1 cannabinoid receptor ligands, acting as inverseagonists in a [35S]-GTPgammaS assay. The affinity of 3,5,5'-triphenylimidazolidine-2,4-dione and 3,5,5'-triphenyl-2-thioxoimidazolidin-4-one