Sodium Acetate → 2-(5-Phenyl-1-oxopentyl)-2-oxiranecarboxylic acid methyl ester

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To a suspension of 7.6 g (35.4 mmol) of pyridinium chlorochromate and 2.90 g (35.4 mmol) of anhydrous sodium acetate in 100 ml of methylene chloride is added 1.55 g (5.9 mmol) of 2-(5-phenyl-1-hydroxypentyl)-2-oxiranecarboxylic acid methyl ester. The mixture is stirred at room temperature for 3 hours and then is diluted with ethyl ether. Filtration through Florisil and rotoevaporation gives an oil which is subjected to preparative column chromatography on silica gel (hexane:ethyl ether (3:2)). The appropriate fractions are combined and rotoevaporated to give 670 mg (43.3%) of the title compound: IR (film) 1757, 1723 cm-1 ; NMR (CDCl3) δ 1.65 (4H, m), 2.48-2.65 (4H, mc), 3.06 (1H, d, J=6 Hz), 3.33 (1H, d, J=6 Hz), 3.83 (3H, s), 7.21 (3H, m), 7.30 (2H, m).

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