Methanol → Methyl 1-amino-4-methoxy-4-(methoxymethyl)cyclohexanecarboxylate
Reaktionsgleichung
S(Cl)(Cl)=O.Cl.[NH2:6][C:7]1([C:18]([OH:20])=[O:19])[CH2:12][CH2:11][C:10]([O:16][CH3:17])([CH2:13][O:14][CH3:15])[CH2:9][CH2:8]1.[CH3:21]O>>[NH2:6][C:7]1([C:18]([O:20][CH3:21])=[O:19])[CH2:12][CH2:11][C:10]([O:16][CH3:17])([CH2:13][O:14][CH3:15])[CH2:9][CH2:8]1Komponenten
4
Reaktionsbedingungen
- Temperatur
- 40 °C
Versuchsvorschrift
At 0° C., 4.1 ml (55.60 mmol) of thionyl chloride were added dropwise to 4.70 g of the compound from Example 20A in 50 ml of methanol. The mixture was stirred at 0° C. for 0.5 hours and at 40° C. overnight. After cooling, the mixture was concentrated, the residue was taken up in ethyl acetate and washed with saturated aqueous sodium bicarbonate solution, the aqueous phase was extracted repeatedly with ethyl acetate and the combined organic phases were dried over sodium sulphate, filtered and concentrated. This gave 392 mg (61% of theory from Example 16A) of the title compound as a diastereomer mixture which was reacted without further purification.