Reaktion #676604

ord-e7182cec74e14271a01f85e0cfdb077b

Lösungsmittel

Reaktionsbedingungen

Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    SonstigeHydrocodone precipitates
  2. 2
    workup.ADDITIONdichlormethane was added
  3. 3
    SonstigeThe layers were then separated
  4. 4
    Extraktionthe basic aqueous layer was extracted two times with dichloromethane
  5. 5
    TrocknenThe organic layer was dried over MgSO4
  6. 6
    Sonstigeevaporated

Vorschrift

Hydrocodone bitartrate salt was dissolved in water. To this was added 2 equivalents solid NaHCO3. Hydrocodone precipitates and dichlormethane was added. The biphasic solution was allowed to stir for twenty minutes. The layers were then separated and the basic aqueous layer was extracted two times with dichloromethane. The organic layer was dried over MgSO4 and evaporated to yield hydrocodone free base as a white powder. Isolated yield was generally 95+%

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US09233168B2uspto-grants-2016_01