反应详情

A mixture of 2-oxo-4-phenoxybenzothiazoline (2.0 g), ethyl bromoacetate (1.7 g), potassium carbonate (1.4 g) in acetone (30 ml) was refluxed for an hour with stirring. After the resultant mixture was filtered, the filtrate was concentrated under reduced pressure to give a residue, which was recrystallized from a mixture of ethanol and n-hexane to give crystalline ethyl 2-oxo-4-phenoxy-3-benzothiazolineacetate (2.0 g).

1. temperaturewas refluxed for an hour
2. filtrationAfter the resultant mixture was filtered
3. concentrationthe filtrate was concentrated under reduced pressure
4. customto give a residue, which
5. customwas recrystallized from a mixture of ethanol and n-hexane