23210-56-2Relevant articles and documents
Ifenprodil Stereoisomers: Synthesis, Absolute Configuration, and Correlation with Biological Activity
Bechthold, Elena,Schreiber, Julian A.,Lehmkuhl, Kirstin,Frehland, Bastian,Schepmann, Dirk,Bernal, Freddy A.,Daniliuc, Constantin,álvarez, Inés,Garcia, Cristina Val,Schmidt, Thomas J.,Seebohm, Guiscard,Wünsch, Bernhard
, p. 1170 - 1179 (2021/02/01)
Ifenprodil (1) is a potent GluN2B-selective N-methyl-d-aspartate (NMDA) receptor antagonist that is used as a cerebral vasodilator and has been examined in clinical trials for the treatment of drug addiction, idiopathic pulmonary fibrosis, and COVID-19. To correlate biological data with configuration, all four ifenprodil stereoisomers were prepared by diastereoselective reduction and subsequent separation of enantiomers by chiral HPLC. The absolute configuration of ifenprodil stereoisomers was determined by X-ray crystal structure analysis of (1R,2S)-1a and (1S,2S)-1d. GluN2B affinity, ion channel inhibitory activity, and selectivity over α, σ, and 5-HT receptors were evaluated. (1R,2R)-Ifenprodil ((1R,2R)-1c) showed the highest affinity toward GluN2B-NMDA receptors (Ki = 5.8 nM) and high inhibition of ion flux in two-electrode voltage clamp experiments (IC50 = 223 nM). Whereas the configuration did not influence considerably the GluN2B-NMDA receptor binding, (1R)-configuration is crucial for elevated inhibitory activity. (1R,2R)-Configured ifenprodil (1R,2R)-1c exhibited high selectivity for GluN2B-NMDA receptors over adrenergic, serotonergic, and σ1 receptors.
Method for treating diseased-related or drug-induced dyskinesias
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, (2008/06/13)
Dyskinesias in humans are treated by administering a therapeutically effective dose of an NR1A/2B site-selective NMDA receptor antagonist compound to a human suffering therefrom.
Process for the preparation of 1-(4-hydroxyphenyl)-2-(4-benzylpiperidino)-1-propanol and acid-addition salts thereof
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, (2008/06/13)
A process for the preparation of 1-(4-hydroxyphenyl)-2-(4-benzylpiperidino)-1-propanol (i.e. ifenprodil) and acid-addition salts thereof, characterized by brominating 4'-hydroxypropiophenone in a single or mixed solvent selected from the group consisting of methanol, ethanol and a saturated aliphatic ether, removing hydrogen bromide formed in the course of the bromination, adding 4-benzylpyridine to the reaction mixture, heating the reaction mixture under reflux in a single or mixed solvent selected from the group consisting of methanol and ethanol, and then subjecting the resultant reaction mixture to catalytic reduction to form 1-(4-hydroxyphenyl)-2-(4-benzylpiperidino)-1-propanol hydrobromide in the reaction mixture. The end product (i.e. ifenprodil) can be obtained according to this process in a high yield of about 80% within 14 hours from the starting material in a single reaction container throughout the process, without introducing a protective benzyl group into the starting material prior to the bromination.