Title: Dipipanone
CAS Registry Number: 467-83-4
CAS Name: 4,4-Diphenyl-6-(1-piperidinyl)-3-heptanone
Additional Names: dl-4,4-diphenyl-6-piperidinoheptan-3-one; 6-piperidino-4,4-diphenylheptan-3-one; 2-(1-piperidino)-4,4-diphenyl-5-heptanone; phenylpiperone
Manufacturers' Codes: 378C48; Hoechst 10805
Trademarks: Piperidyl Amidone; Pamedon(e); Fenpidon; Pipadone (Burroughs Wellcome)
Molecular Formula: C24H31NO
Molecular Weight: 349.51
Percent Composition: C 82.47%, H 8.94%, N 4.01%, O 4.58%
Literature References: Prepn: Ofner, Walton, J. Chem. Soc. 1950, 2158; GB 654975 (1951 to Wellcome Foundation). Variations of the synthesis using phenyllithium as condensing agent: Kazuhiko, Kubota, Kumamoto Med. J. 12, 304-307 (1960).
Derivative Type: Hydrochloride
CAS Registry Number: 856-87-1
Molecular Formula: C24H31NO.HCl
Molecular Weight: 385.97
Percent Composition: C 74.68%, H 8.36%, N 3.63%, O 4.15%, Cl 9.19%
Properties: Minute prisms from wet alcohol-ether, mp 123-126°. Also reported as mp 126-127°.
Melting point: mp 123-126°; mp 126-127°
Derivative Type: Hydrobromide
Molecular Formula: C24H31NO.HBr
Molecular Weight: 430.42
Percent Composition: C 66.97%, H 7.49%, N 3.25%, O 3.72%, Br 18.56%
Properties: Crystals from water, mp 103-106°.
Melting point: mp 103-106°
NOTE: This is a controlled substance (opiate): 21 CFR, 1308.11.
Therap-Cat: Analgesic (narcotic).
Keywords: Analgesic (Narcotic).
Dipiproverine Dipivefrin Diploicin Diponium Bromide Diprenorphine

Systematic (IUPAC) name
Clinical data
Trade names Diconal
Legal status Controlled (S8) (AU) Schedule I (CA) Schedule I (US) Class A(UK) Schedule I (UN)
Routes Oral, Intravenous
CAS number 467-83-4 N
ATC code None
PubChem CID 13331
DrugBank DB01491
ChemSpider 12766 YesY
UNII verifiedrevid = 460793100 X188638Y2V verifiedrevid = 460793100 N
Chemical data
Formula C24H31NO 
Mol. mass 349.52
 N (what is this?)

Dipipanone (Pipadone)[1] is a strong opioid analgesic drug, used for very severe pain in cases where other analgesics are unsuitable, for instance where morphine is indicated but cannot be used due to the patient being allergic to morphine.