Pethidine intermediate A
Pethidine intermediate A is a 4-phenylpiperidine derivative that is a precursor to the opioid analgesic drug pethidine (meperidine). It is not known to have any analgesic activity in its own right, however other derivatives of pethidine with a 4-cyano group in place of the carboxylate ethyl ester have been found to be active, so pethidine intermediate A might also show opioid effects. It is scheduled by UN Single Convention on Narcotic Drugs. It is a Schedule II Narcotic controlled substance in the United States and has an ACSCN of 9232. The 2014 annual manufacturing quota was 6 grammes (as an end product, presumably for research use). 
|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||200.28 g/mol g·mol−1|
|3D model (JSmol)|
- Lomenzo SA, Rhoden JB, Izenwasser S, Wade D, Kopajtic T, Katz JL, Trudell ML. Synthesis and Biological Evaluation of Meperidine Analogues at Monoamine Transporters. Journal of Medicinal Chemistry. 2005; 48:1336-1343.