反应详情

Methyl thioglycolate (5.0 mL, 55.0 mmol) was added dropwise to an ice cold solution of sodium methoxide (55.0 mmol) in methanol (18 mL) over 15 minutes. Methyl bromobutyrate (9.9 g, 55.0 mmol) was added slowly. The reaction was allowed to warm to room temperature and stirred overnight. The resulting mixture was filtered, concentrated, and taken up in methylene chloride and filtered again. The filtrate was concentrated and the product was distilled to give methyl 4-[(2-methoxy-2-oxoethyl)sulfanyl]butanoate (6.34 g, 55%) as a clear oil.

1. filtrationThe resulting mixture was filtered
2. concentrationconcentrated
3. filtrationfiltered again
4. concentrationThe filtrate was concentrated
5. distillationthe product was distilled