反应详情

A solution of (3-oxo-1,3-dihydro-isobenzofuran-1-yl)-acetic acid (5.0 g, 26 mmol) in thionyl chloride (10 ml) was heated at 75° C. for 15 minutes. The excess thionyl chloride was removed under vacuum to give a red oil. The red oil was dissolved in CH2Cl2 (10 ml) and then the solution was slowly added to concentrated NH4OH (40 ml) at 0° C. The resultant solid was filtered and washed with water and hexane, followed by addition of toluene. Removal of the solvent led to 2-(3-oxo-1,3-dihydro-2-benzofuran-1-yl)acetamide as a cream solid (4.2 g, 84%).

1. customThe excess thionyl chloride was removed under vacuum
2. customto give a red oil
3. filtrationThe resultant solid was filtered
4. washwashed with water and hexane
5. additionfollowed by addition of toluene
6. customRemoval of the solvent