Facile One-Pot Synthesis of Substituted Hydantoins from Carbamates
作者:Manjinder Gill、Dinesh Tanwar、Anjali Ratan
DOI:10.1055/s-0036-1588468
日期:2017.10
A novel and simple approach for the preparation of 3-substituted, 5-substituted, or 3,5-disubstituted hydantoins is reported. It involves the reaction of α-amino methyl ester hydrochlorides with carbamates to yield the corresponding ureido derivatives, which subsequently cyclize under basic conditions to produce substituted hydantoins in good yields. By applying this method, the bioactive anticonvulsant
Functionalized amino acid anticonvulsants: synthesis and pharmacological evaluation of conformationally restricted analogues
作者:Arnaud LeTiran、James P Stables、Harold Kohn
DOI:10.1016/s0968-0896(01)00204-8
日期:2001.10
Proven conformationallyrestricted analogues of anticonvulsant functionalized aminoacids (FAAs) were prepared using short-range cyclizations and evaluated in pharmacological assays providing new information concerning the structural requirements for FAA function.
One-step synthesis of substituted hydantoins can be achieved by the palladium-catalyzed "ureidocarbonylation" of aldehydes with urea derivatives and carbon monoxide [Eq. (1)]. This surprisingly selective protocol converts substituted ureas into 1,5- and 1,3,5-substituted hydantoins in yields of up to 93 %.