Norethindrone → Norethisterone-3-oxime
Reaktionsgleichung
[CH3:1][C@@:2]12[C@:10]([OH:13])([C:11]#[CH:12])[CH2:9][CH2:8][C@H:7]1[C@@H:6]1[CH2:14][CH2:15][C:16]3[C@@H:22]([C@H:5]1[CH2:4][CH2:3]2)[CH2:21][CH2:20][C:18](=O)[CH:17]=3.Cl.[NH2:24][OH:25]>N1C=CC=CC=1>[CH3:1][C@@:2]12[C@:10]([OH:13])([C:11]#[CH:12])[CH2:9][CH2:8][C@H:7]1[C@@H:6]1[CH2:14][CH2:15][C:16]3[C@@H:22]([C@H:5]1[CH2:4][CH2:3]2)[CH2:21][CH2:20]/[C:18](=[N:24]\[OH:25])/[CH:17]=3Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 98 °C
Versuchsvorschrift
A solution of norethindrone, 6.5 m moles, and hydroxylamine hydrochloride, 16.4 m moles, in 10 ml of dried pyridine was stirred at room temperature for 48 hours. The progress of the reaction was followed by tlc (thin layer chromatography). The reaction mixture was then heated at 98°C. (bath temperature) for 15 minutes, allowed to cool to 55°C and the pyridine was evaporated in vacuo. The residue was extracted with ether. Drying and removal of the ether gave a residue which was recrystallized from methanol-water and methanol to yield 1.93 g (95%) of norethindrone oxime, mp 121.5°-123°C. Tlc with ethyl acetate: petroleum ether; acetone 1:1:0.2 indicated the product to be a mixture of the syn and anti isomers of the oxime.