Experimental Page -Piperylone

Piperylone
Identifiers

IUPAC name 4-ethyl-2-(1-methylpiperidin-4-yl)-5-phenyl-1H-pyrazol-3-one
CAS Number	2531-04-6
PubChem CID	17319
ChemSpider	16389
UNII	XWH5VH1L2F
CompTox Dashboard (EPA)	DTXSID90179956
ECHA InfoCard	100.017.990
Chemical and physical data
Formula	C₁₇H₂₃N₃O
Molar mass	285.391 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES CCC1=C(NN(C1=O)C2CCN(CC2)C)C3=CC=CC=C3
InChI InChI=1S/C17H23N3O/c1-3-15-16(13-7-5-4-6-8-13)18-20(17(15)21)14-9-11-19(2)12-10-14/h4-8,14,18H,3,9-12H2,1-2H3 Key:LBFGQUCAQWAFNN-UHFFFAOYSA-N

Piperylone is a pyrazolone with analgesic, anti-inflammatory, and antipyretic properties.^[1]

Synthesis

Hydrazone formation of 1-methyl-4-piperidone (1) with benzohydrazide (2) gives (3). Catalytic hydrogenation using Adams' catalyst gives the substituted hydrazine (6) after acid-catalyzed hydrolysis to remove the benzoyl group and neutralization. The pyrazolone ring is formed in a condensation reaction with ethyl 2-benzoylbutanoate (7), yielding piperylone.^[2]^[3]^[4]

^ "Piperylone". Pharmaceutical Manufacturing Encyclopedia. Vol. 4 (3rd ed.). William Andrew Publishing. 2007. pp. 167p – 168p. ISBN 978-0-8155-1526-5.
^ US patent 2903460, Jucker E, Ebnother A, Lindenmann AJ, "Pyrazolone derivatives", issued 1959-09-08, assigned to Sandoz AG
^ Ebnöther A, Jucker E, Lindenmann A (1959). "Über neuartige, basisch substituierte Pyrazolon-Derivate. Untersuchungen über synthetische Arzneimittel. 3. Mitteilung". Helvetica Chimica Acta. 42 (4): 1201–1214. doi:10.1002/hlca.19590420415.
^ "Piperylone". Pharmaceutical Substances. Thieme. Retrieved 2024-07-17.

Opiates/opium	Codeine^# +aspirin +paracetamol Morphine^# (+naltrexone) Opium Laudanum Paregoric
Semisynthetic	Acetyldihydrocodeine Benzylmorphine Buprenorphine (+naloxone) Butorphanol Desomorphine Diamorphine (heroin) Dihydrocodeine (+paracetamol) Dihydromorphine Etorphine Ethylmorphine Hydrocodone (+paracetamol, +ibuprofen, +aspirin) Hydromorphinol Hydromorphone Levorphanol Metopon Nalbuphine Nicocodeine Nicodicodine Nicomorphine Oxycodone (+paracetamol, +aspirin, +ibuprofen, +naloxone, +naltrexone) Oxymorphone Papaveretum Thebacon
Synthetic	Alfentanil Alphaprodine Anileridine Bezitramide Carfentanil Dextromoramide Dextropropoxyphene Dezocine Dimenoxadol Dipipanone Ethoheptazine Fentanyl^# (+fluanisone) Ketobemidone Lofentanil Meptazinol Methadone^# NFEPP Norpipanone Oliceridine Pentazocine Pethidine (meperidine) Phenadoxone Phenazocine Phenoperidine Piminodine Piritramide Proheptazine Propiram Remifentanil Sufentanil Tapentadol Tilidine Tramadol (+celecoxib, +paracetamol) Viminol

Propionates	Benoxaprofen ^‡ Fenoprofen Flurbiprofen Ibuprofen^# (Dexibuprofen) (+paracetamol) Ketoprofen (Dexketoprofen) Loxoprofen Naproxen Oxaprozin Suprofen Tiaprofenic acid Zaltoprofen
Oxicams	Isoxicam Lornoxicam Meloxicam Piroxicam Tenoxicam
Acetates	Acemetacin Bromfenac Diclofenac Etodolac Indometacin (Indometacin farnesil) Ketorolac Sulindac Tolmetin Zomepirac ^‡
COX-2 inhibitors	Celecoxib (+tramadol) Etoricoxib Lumiracoxib ^‡ Parecoxib Rofecoxib ^‡ Valdecoxib ^‡
Fenamates	Flufenamic acid Meclofenamic acid Mefenamic acid Tolfenamic acid
Salicylates	Aspirin (acetylsalicylic acid)^# (+paracetamol/caffeine) Aloxiprin Benorylate Carbasalate calcium Choline salicylate Diflunisal Dipyrocetyl Ethenzamide Guacetisal Imidazole salicylate Magnesium salicylate Morpholine salicylate Potassium salicylate Salicin Salicylamide Salsalate Sodium salicylate Wintergreen (methyl salicylate)
Pyrazolones	Aminophenazone^‡ Ampyrone Metamizole (dipyrone) Nifenazone Phenazone Propyphenazone (+paracetamol/caffeine)
Others	Benzydamine Floctafenine Glafenine Nabumetone Nimesulide Proquazone

Calcium blockers	Alcohol (ethanol) Gabapentin Gabapentin enacarbil Leconotide Mirogabalin Pregabalin Ziconotide
Sodium blockers	Carbamazepine Lacosamide Local anesthetics (e.g., cocaine, lidocaine) Mexiletine Nefopam Tricyclic antidepressants (e.g., amitriptyline^#) Na_v1.7/1.8-selective: DSP-2230^§ Funapide^§ PF-05089771^§
Potassium openers	Flupirtine^‡

Others

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