Water → 2-(4-Ethylamino-3-nitrophenyl)benzoxazole

Participants

Reaction Steps

To a suspension of 2-(4-fluoro-3-nitrophenyl)benzoxazole (see Working Example 15-2) (300 mg, 1.16 mmol) in ethanol (5 mL) was added potassium carbonate (321 mg, 2.32 mmol) and aqueous ethylamine solution (ca. 70%, 149 mg, 2.32 mmol), and this was heated to reflux for 4 hours. After the reaction was complete, this was cooled to room temperature, water was added, and after the precipitated crystals were filtered and washed with water, they were dried to yield the title compound (310 mg, 94.3% yield).

Provenance & Evidence