Synthesis and anticonvulsant activity of enaminones
作者:Ivan O. Edafiogho、Christine N. Hinko、Hyejung Chang、Jacqueline A. Moore、Dianna Mulzac、Jesse M. Nicholson、K. R. Scott
DOI:10.1021/jm00093a012
日期:1992.7
A new series of novel enaminones has been synthesized from cyclic beta-dicarbonyl precursors which were condensed with morpholine, pyrrolidine, phenethylamine, hydrazines, substituted benzyl amines, and substituted anilines. These compounds were subsequently evaluated for anticonvulsant activity in a variety of anticonvulsant models by the National Institute of Neurological and Communicative Disorders and Stroke and in our laboratory. Several of these compounds exhibited potent anticonvulsant activity with a remarkable lack of neurotoxicity. The most active analog, methyl 4-[(p-chlorophenyl)amino]-6-methyl-2-oxo-cyclohex-3-en-1-oate (27), was protective in the maximal electroshock (MES) seizure test in the rat with an oral ED50 of 5.8 mg/kg with no toxicity noted at doses up to 380 mg/kg, thus providing a protective index (TD50/ED50) of > 65.5. A similar protective index for 27 was noted upon intraperitoneal (ip) administration in mice. The anticonvulsant effect of 27 occurred within 15 min of administration and the compound remained active beyond 4 h. Compound 27 was also active in the rat corneal kindled model. The application of Free-Wilson analysis to structure-activity correlation in this series is discussed.
Cyclization Reactions Leading to β-Hydroxyketo Esters
作者:Jesse M. Nicholson、Ivan O. Edafiogho、Jacqueline A. Moore、Vida A. Farrar、K.R. Scott
DOI:10.1002/jps.2600830118
日期:1994.1
the research was to synthesize β-diketo esters and to evaluate them for anticonvulsant activity. The reaction of methyl vinyl ketone with dimethyl malonate in the presence of potassium carbonate gave an uncyclized product that underwent a Clalsen condensation to yield methyl 2-hydroxy-4-oxocyclohex-2-en- 1-oate (5a). Similarly, other cyclized β-hydroxyketo esters were prepared, and their spectrometric
Functionalised enaminones and their use in heterocyclic synthesis
作者:John V. Greenhill、Ibrahim Chaaban、Peter J. Steel
DOI:10.1002/jhet.5570290602
日期:1992.10
A series of enaminones derived from 2,4-dioxocyclohexane carboxylic acid esters has been prepared. The use of some of the new derivatives in the synthesis of some quinazolones and imidazoloquinazolines is illustrated.