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Aminorex

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Aminorex

Aminorex
Systematic (IUPAC) name
(RS)-5-phenyl-4,5-dihydro-1,3-oxazol-2-amine
Clinical data
Legal status
Identifiers
CAS number  YesY
ATC code None
PubChem
DrugBank
ChemSpider  YesY
UNII  YesY
KEGG  YesY
ChEMBL  YesY
Chemical data
Formula C9H10N2O 
Mol. mass 162.19
 YesY   

Aminorex (Menocil, Apiquel, aminoxaphen, aminoxafen, McN-742) is a weight loss (anorectic) stimulant drug. It was withdrawn from the market after it was found to cause pulmonary hypertension.[1] In the U.S., it is an illegal Schedule I drug, with no medical use and poor safety profile.

Aminorex, in the 2-amino-5-aryl oxazoline class, was developed by McNeil in 1962.[2] It is closely related to 4-methylaminorex. Aminorex has been shown to have locomotor stimulant effects, lying midway between dextroamphetamine and methamphetamine. Aminorex effects have been attributed to the release of catecholamines.[3]

History

It was discovered in 1962 by Edward John Hurlburt (U.S. Patent 3,115,494), and was quickly found in 1963 to have an anorectic effect in rats. It was introduced as a prescription appetite suppressant in Germany, Switzerland and Austria in 1965, but was withdrawn in 1972 after it was found to cause pulmonary hypertension in approximately 0.2% of patients, and was linked to a number of deaths.[3]

Synthesis

The synthesis was first reported in a structure-activity relationship study of 2-amino-5-aryl-2-oxazolines, where aminorex was found to be approximately 2.5 times more potent than D-amphetamine sulfate in inducing anorexia in rats, and was also reported to have CNS stimulant effects.

The racemic synthesis involves addition/cyclization reaction of 2-amino-1-phenylethanol with cyanogen bromide.[4] A similar synthesis has been also published.[5]

See also

References

  1. ^ Gaine SP, Rubin LJ, Kmetzo JJ, Palevsky HI, Traill TA (November 2000). "Recreational use of aminorex and pulmonary hypertension". Chest 118 (5): 1496–7.  
  2. ^ US Patent 3161650 - 2-Amino-5-Aryloxazoline Products
  3. ^ a b Fishman AP. (Jan 1991). "Aminorex to fen/phen - An epidemic foretold". Circulation 99 (1): 156–161.  
  4. ^ Poos GI, Carson JR, Rosenau JD, Roszowski AP, Kelley NM, McGowin J. (May 1963). "2-Amino-5-aryl-2-oxazolines. Potent New Anorectic Agents.". Journal of Medicinal Chemistry 6 (3): 266–272.  
  5. ^ Ueda S, Terauchi H, Yano A, Ido M, Matsumoto M, Kawasaki M. (Jan 2004). "4,5-Disubstituted-1,3-oxazolidin-2-imine derivatives: a new class of orally bioavailable nitric oxide synthase inhibitor.". Bioorg. Med. Chem. Lett. 14 (2): 313–316.  


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