title: [Cyclic ureas. 1. Racemates and enantiomers of hexahydropyrimidine-2-ones: synthesis, configuration and sedative-hypnotic action].
abstract: The racemates and the enantiomers of the hexahydropyrimidin-2-ones 2a-2e which can be regarded as cyclic ureas are obtained from the racemates and the enantiomers of the barbiturates 1a-1e by reduction with LiAlH4/AlCl3. The enantiomers of 2a-2d, dextrorotatory in ethanol, possess S-configuration. In a study with rats all cyclic ureas synthesized showed sedative-hypnotic activity. Some of the enantiomers exhibited marked enantioselecive differences in their potency.
authors.affiliation: Fachrichtung Pharmazeutische Chemie, Universität des Saarlandes, Saarbrücken.
authors.forename: J
authors.initials: J
authors.lastname: Knabe
authors.forename: H P
authors.initials: HP
authors.lastname: Büch
authors.forename: J
authors.initials: J
authors.lastname: Biwersi
mesh_terms: D000818:Animals; D005260:Female; D006993:Hypnotics and Sedatives / Q000138:chemical synthesis* / Q000494:pharmacology; D011744:Pyrimidinones / Q000138:chemical synthesis* / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D013237:Stereoisomerism
chemical_list: D006993:Hypnotics and Sedatives; D011744:Pyrimidinones