[CH3:1][N:2]1[C@@H:19]2[CH2:20][C:7]3[CH:8]=[CH:9][C:10]([O:22][CH3:23])=[C:11]4[O:12][C@H:13]5[C:14]([CH2:16][CH2:17][C@:18]2([OH:21])[C@:5]5([C:6]=34)[CH2:4][CH2:3]1)=[O:15].[OH2:24]>[Pd].C(O)=O>[CH3:1][N:2]1[C@@H:19]2[CH2:20][C:7]3[CH:8]=[CH:9][C:10]([O:22][CH3:23])=[C:11]4[O:12][C@H:13]5[C:14]([CH2:16][CH2:17][C@:18]2([OH:21])[C@:5]5([C:6]=34)[CH2:4][CH2:3]1)=[O:15].[OH-:24].[NH4+:2]Pd/C Catalyst was filtered off and ammonium hydroxide was used for the oxycodone base precipitation (˜60 mL) at temperature less than 15° C. Precipitated product was washed with water (2×75 mL) and dried on filter giving 28.07 g of oxycodone base. The oxycodone base was transferred into 250-mL RBF with Pd/C catalyst (0.59 g) and water (120 mL). Formic acid (4.36 mL) was added (pH 2.1) and stirring continued for 45 minutes at 50-60° C. The reaction mixture was cooled to ambient temperature, catalyst was filtered off, and oxycodone base was isolated with ammonium hydroxide addition to the filtrate at temperature lower than 20° C. Drying on filter provided 29.51 g of the oxycodone base (2nd crude, Lot O).
Wird geladen…
