Ifenprodil

Originator

Vadilex,Carriere,France,1972

Uses

vasodilator

Uses

Ifenprodil is a NMDA receptor antagonist.

Definition

ChEBI: 4-[1-hydroxy-2-[4-(phenylmethyl)-1-piperidinyl]propyl]phenol is a member of piperidines.

Manufacturing Process

The initial steps involve reacting benzyl chloride with 4- hydroxypropiophenone. The benzyloxypropiophene thus obtained is first brominated and then reacted with 4-benzylpiperidine to give 1-(pbenzyloxyphenyl)-2-(4-benzyl-piperidino)propan-1-one.
The neutral tartrate may be prepared directly by reduction of 1-(pbenzyloxyphenyl)-2-(4-benzyl-piperidino)propan-1-one. For the reduction, a mixture of 175 g of ketone (0.425 mol) and 32 g of tartaric acid (0.213 mol) is hydrogenated at 50°C under pressure of 50 kg/cm2 in 440 ml of methanol in the presence of 12 g of palladium on charcoal.
The catalyst is filtered off at elevated temperature, and the filtrate is concentrated by evaporation under reduced pressure to a volume of 300 ml and added in a thin stream to 2.5 liters of diethyl ether with mechanical agitation. The precipitate is separated, washed with diethyl ether and dried in vacuo at 80° to 85°C for several hours. 325 g (96% yield) of the neutral tartrate of 1-(p-hydroxyphenyl)-2-(4-benzyl-piperidino)propan-1-ol are obtained.

Therapeutic Function

Vasodilator

Biological Activity

NMDA receptor antagonist, acting at the polyamine site. Also an α -adrenergic vasodilator. σ 2 ligand displaying about 3-fold selectivity over σ 1 sites.