Acetyl chloride → N-(5-fluoro-2-oxo-2,3-dihydro-1H-indol-7-yl)-acetamide

Participants

Reaction Conditions

Reaction Steps

A stirred solution of 7-amino-5-fluoro-1,3-dihydro-indol-2-one (1.0 g, 6 mmol) obtained from Example 4 in 30 ml of tetrahydrofuran was added with tirethylamine (1.3 ml, 9 mmol). The solution was cooled down to 0° C. in an ice-water bath and added with acetyl chloride (1.3 ml, 9 mmol) dropwise. The resulting mixture was heated to reflux for 1.5 hours and cooled until precipitate was formed. The solid was filtered, washed with water (50 ml×3) and dried in vacuo to give N-(5-fluoro-2-oxo-2,3-dihydro-1H-indol-7-yl)-acetamide (1.2 g, 96%) as a white solid.

Provenance & Evidence