Sulfuric Acid → Normeperidine
反応式
OS(O)(=O)=O.[CH3:6][C:7]1C=CC(S(O)(=O)=O)=CC=1.[C:17]1([C:23]2([C:29]([OH:31])=[O:30])[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]2)[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>CCO>[CH2:6]([O:30][C:29]([C:23]1([C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)[CH2:24][CH2:25][NH:26][CH2:27][CH2:28]1)=[O:31])[CH3:7]参加物
4
実験手順
To a stirred solution of H2SO4 (1.62 g, 16.56 mmol) in EtOH (200 mL), 4-phenyl-4-piperidinecarboxylic acid 4-methylbenzenesulfonate (25 g, 66.23 mmol) was added and the mixture was stirred and refluxed for 12 h. Excess ethanol was evaporated at reduced pressure and the residue was poured into a mixture of ice and 6N NaOH. The pH was adjusted to 10-11 by adding more 6N NaOH and extracted with CH2Cl2 (3×100 mL). The combined CH2Cl2 extracts were dried (MgSO4) and the solvent evaporated to leave the desired product as a colorless viscous oil, the 1H-NMR showed it to be pure (14.68 g, 95%) and was used without any further purification.