Br[CH2:2][C:3]([OH:10])([CH2:7][O:8][CH3:9])[CH2:4][O:5][CH3:6].[OH-].[Na+]>O>[CH3:6][O:5][CH2:4][C:3]1([CH2:7][O:8][CH3:9])[CH2:2][O:10]1To 1-bromo-2-hydroxy-3-methoxy-2-(methoxymethyl)propane (30 g) was added sodium hydroxide (5.6 g) in water (50 cm3). The mixture was stirred at room temperature for 1 h and then extracted with diethyl ether. The extracts were dried (Na2SO4) and the solvent removed under reduced pressure (40° C. at 15 mmHg) to give the oxirane (13 g, 70%) as a colourless liquid. No further purification of this material was needed.
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