Niaprazine

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Niaprazine
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Clinical data
Trade namesNopron
Other namesCERM-1709
AHFS/Drugs.comInternational Drug Names
Routes of
administration		Oral
Drug classSerotonin 5-HT2A receptor antagonist; α1-Adrenergic receptor antagonist
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Legal status
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  • In general: ℞ (Prescription only)
Pharmacokinetic data
Elimination half-life~4.5 hours
Identifiers
  • N-{4-[4-(4-fluorophenyl)piperazin- 1-yl]butan- 2-yl}pyridine- 3-carboxamide
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Chemical and physical data
FormulaC20H25FN4O
Molar mass356.445 g·mol−1
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  • Fc3ccc(N2CCN(CCC(NC(=O)c1cccnc1)C)CC2)cc3
  • InChI=1S/C20H25FN4O/c1-16(23-20(26)17-3-2-9-22-15-17)8-10-24-11-13-25(14-12-24)19-6-4-18(21)5-7-19/h2-7,9,15-16H,8,10-14H2,1H3,(H,23,26)
  • Key:RSKQGBFMNPDPLR-UHFFFAOYSA-N
Data page
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Niaprazine (INN; brand name Nopron) is a sedative-hypnotic drug of the phenylpiperazine group.[1][2] It has been used in the treatment of sleep disturbances since the early 1970s in several European countries including France, Italy, and Luxembourg.[3][4] It is commonly used with children and adolescents on account of its favorable safety and tolerability profile and lack of abuse potential.[5][6][7][8][9][10]

Originally believed to act as an antihistamine and anticholinergic,[11] niaprazine was later discovered to have low or no binding affinity for the H1 and mACh receptors (Ki = > 1 μM), and was instead found to act as a potent and selective 5-HT2A and α1-adrenergic receptor antagonist (Ki = 75 nM and 86 nM, respectively).[12] It possesses low or no affinity for the 5-HT1A, 5-HT2B, D2, and β-adrenergic, as well as at SERT and VMAT (Ki = all > 1 μM), but it does have some affinity for the α2-adrenergic receptor (Ki = 730 nM).[12]

Niaprazine has been shown to metabolize to the compound para-fluorophenylpiperazine (pFPP) in a similar manner to how trazodone and nefazodone metabolize to meta-chlorophenylpiperazine (mCPP).[13][14] It is unclear what role, if any, pFPP plays in the clinical effects of niaprazine.[12] However, from animal studies it is known that pFPP, unlike niaprazine, does not produce sedative effects, and instead exerts a behavioral profile indicative of serotonergic activation.[13]

Synthesis

A Mannich reaction using 4-fluorophenylpiperazine (1), 1,3,5-trioxane (2) and acetone gives the ketone (4). Reaction with hydroxylamine produces the oxime, (5), which is reduced with lithium aluminium hydride to give the amine (6). Amide formation with nicotinic acid (7), activated as its acid chloride, yields nilaprazine.[15][16]

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content.Elks J (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 862–. ISBN 978-1-4757-2085-3.
  2. ^ Page Module:Citation/CS1/styles.css has no content.Kent A, Billiard M (2003). Sleep: physiology, investigations, and medicine. New York: Kluwer Academic/Plenum. ISBN 978-0-306-47406-4.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Swiss Pharmaceutical Society (2000). Index Nominum 2000: International Drug Directory (Book with CD-ROM). Boca Raton: Medpharm Scientific Publishers. ISBN 978-3-88763-075-1.
  4. ^ Page Module:Citation/CS1/styles.css has no content.Triggle DJ (1996). Dictionary of Pharmacological Agents. Boca Raton: Chapman & Hall/CRC. ISBN 978-0-412-46630-4.
  5. ^ Page Module:Citation/CS1/styles.css has no content.Franzoni E, Masoni P, Mambelli M, Marzano P, Donati C (1987). "[Niaprazine in behavior disorders in children. Double-blind comparison with placebo]". La Pediatria Medica e Chirurgica: Medical and Surgical Pediatrics (in italiano). 9 (2): 185–7. PMID 2958783.
  6. ^ Page Module:Citation/CS1/styles.css has no content.Bodiou C, Bavoux F (1988). "[Niaprazine and side effects in pediatrics. Cooperative evaluation of French centers of pharmacovigilance]". Thérapie (in français). 43 (4): 307–11. PMID 2903572.
  7. ^ Page Module:Citation/CS1/styles.css has no content.Ottaviano S, Giannotti F, Cortesi F (October 1991). "The effect of niaprazine on some common sleep disorders in children. A double-blind clinical trial by means of continuous home-videorecorded sleep". Child's Nervous System. 7 (6): 332–5. doi:10.1007/bf00304832. PMID 1837245. S2CID 35908448.
  8. ^ Page Module:Citation/CS1/styles.css has no content.Montanari G, Schiaulini P, Covre A, Steffan A, Furlanut M (1992). "Niaprazine vs chlordesmethyldiazepam in sleep disturbances in pediatric outpatients". Pharmacological Research. 25 (Suppl 1): 83–4. doi:10.1016/1043-6618(92)90551-l. PMID 1354861.
  9. ^ Page Module:Citation/CS1/styles.css has no content.Younus M, Labellarte MJ (2002). "Insomnia in children: when are hypnotics indicated?". Paediatric Drugs. 4 (6): 391–403. doi:10.2165/00128072-200204060-00006. PMID 12038875. S2CID 33340367.
  10. ^ Page Module:Citation/CS1/styles.css has no content.Mancini J, Thirion X, Masut A, et al. (July 2006). "Anxiolytics, hypnotics, and antidepressants dispensed to adolescents in a French region in 2002". Pharmacoepidemiology and Drug Safety. 15 (7): 494–503. doi:10.1002/pds.1258. PMID 16700077. S2CID 24273650.
  11. ^ Page Module:Citation/CS1/styles.css has no content.Duchene-Marullaz P, Rispat G, Perriere JP, Hache J, Labrid C (1971). "[Some pharmacodynamical properties of niaprazine, a new antihistaminic agent]". Thérapie (in français). 26 (6): 1203–9. PMID 4401719.
  12. ^ a b c Page Module:Citation/CS1/styles.css has no content.Scherman D, Hamon M, Gozlan H, et al. (1988). "Molecular pharmacology of niaprazine". Progress in Neuro-psychopharmacology & Biological Psychiatry. 12 (6): 989–1001. doi:10.1016/0278-5846(88)90093-0. PMID 2853885. S2CID 40566589.
  13. ^ a b Page Module:Citation/CS1/styles.css has no content.Keane PE, Strolin Benedetti M, Dow J (February 1982). "The effect of niaprazine on the turnover of 5-hydroxytryptamine in the rat brain". Neuropharmacology. 21 (2): 163–9. doi:10.1016/0028-3908(82)90157-5. PMID 6460945. S2CID 22310059.
  14. ^ Page Module:Citation/CS1/styles.css has no content.Garattini S, Mennini T (1988). Critical Notes on the Specificity of Drugs in the Study of Metabolism and Functions of Brain Monoamines. International Review of Neurobiology. Vol. 29. pp. 259–80. doi:10.1016/s0074-7742(08)60089-6. ISBN 9780123668295. PMID 3042665.
  15. ^ Page Template:Citation/styles.css has no content.US patent 3712893, J Simond, J Moleyre, R Mauvernay, N Busch, "Butyl-piperazine derivatives", issued Script error: No such module "auto date formatter"., assigned to Centre Europeen de Recherches Mauvernay 
  16. ^ Page Module:Citation/CS1/styles.css has no content."Niaprazine". Pharmaceutical Substances. Thieme. Retrieved 2024-07-17.

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