Water → 4-(Nitromethyl)oxan-4-ol
Reaktionsgleichung
[O:1]1[CH2:6][CH2:5][C:4](=[O:7])[CH2:3][CH2:2]1.[N+:8]([CH3:11])([O-:10])=[O:9].[O-]CC.[Na+].O>C(O)C>[N+:8]([CH2:11][C:4]1([OH:7])[CH2:5][CH2:6][O:1][CH2:2][CH2:3]1)([O-:10])=[O:9]Komponenten
6
[O:1]1[CH2:6][CH2:5][C:4](=[O:7])[CH2:3][CH2:2]1.[N+:8]([CH3:11])([O-:10])=[O:9].[O-]CC.[Na+].O>C(O)C>[N+:8]([CH2:11][C:4]1([OH:7])[CH2:5][CH2:6][O:1][CH2:2][CH2:3]1)([O-:10])=[O:9]A solution of tetrahydro-4H-pyran-4-one (45.0 g, 449 mmol) and nitromethane (36.5 mL, 674 mmol) in ethanol (27 mL) was treated with a solution of sodium ethoxide in ethanol (2.67 M, 8.40 mL, 22.5 mmol) using the method described in Part A of Example 9. The reaction mixture was transferred to a reparatory funnel and water (450 mL) was added. The mixture was extracted with ethyl acetate (3×900 mL). The organic layers were combined, dried over MgSO4, filtered, and concentrated to a light brown oil. Ethyl acetate/hexanes was added and pale brown crystals formed that were isolated by filtration and dried to provide 4-(nitromethyl)tetrahydro-2H-pyran-4-ol (24.4 g, 34%).
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