2-(3-oxo-1H-2-benzofuran-1-yl)acetamide

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 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%). The excess thionyl chloride was removed under vacuum to give a red oil The resultant solid was filtered washed with water and hexane followed by addition of toluene Removal of the solvent