Originator
Semap,Janssen-Le Brun ,W. Germany ,1975
Uses
In terms of pharmacological action, penfluridol is similar to pimozide; however, it is significantly longer lasting, which is connected to the slow metabolism of the drug.
Penfluridol is used as a supportive therapy in ambulatory settings for patients suffering
from schizophrenia as well as patients with paranoid, psychotic, and neuroleptic conditions.
Definition
ChEBI: 1-[4,4-bis(4-fluorophenyl)butyl]-4-[4-chloro-3-(trifluoromethyl)phenyl]-4-piperidinol is a diarylmethane.
Manufacturing Process
A mixture of 24 parts of 4,4-bis(p-fluorophenyl)butyl chloride, 20.9 parts of 4(4-chloro-α,α,α-trifluoro-m-tolyl)-4-piperidinol, 13.8 parts of sodium carbonate, a few crystals of potassium iodide in 600 parts of 4-methyl-2pentanone is stirred and refluxed for 60 hours. The reaction mixture is cooled and 150 parts of water is added. The organic layer is separated, dried, filtered and evaporated. The oily residue is crystallized from diisopropylether, yielding 4-(4chloro-α,α,α-trifluoro-m-tolyl)-1-[4,4-bis(p-fiuorophenyl)butyl]-4piperidinol; melting point 106.5°C.
Brand name
Semap (Ortho-McNeil).
Therapeutic Function
Antipsychotic
Biochem/physiol Actions
Penfluridol is studied in the treatment of schizophrenia, Tourette syndrome and acute psychosis. It also exhibits anticancer activity.
Synthesis
Penfluridol, 4-(4-chloro-3-trifluoromethylphenyl)-1-[4,4-bis-(p-fluorophenyl)
butyl]-4-piperidinol (6.6.12), is synthesized implementing a Grignard reaction between
1-carbomethoxypiperidin-4-one and 4-chloro-3-trifluoromethylphenylmagnesium bromide,
giving 1-carbomethoxy-(4-chloro-3-trifluoromethylphenyl)-4-piperidinol (6.6.10). Upon
alkaline hydrolysis of the carbomethoxy group, it turns into (4-chloro-3-trifluoromethylphenyl)-4-piperidinol (6.6.11), the alkylation of which with 1,1-bis(4-fluorophenyl)butyl bromide (6.6.3) gives penfluridol (6.6.12) [67¨C69].
