Triethylamine → 2-((Tetrahydropyran-4-yl)methyl)benzoxazole

Participants

Reaction Steps

2-(4-Fluoro-3-nitrophenyl)benzoxazole (see Working Example 15-2) (900 mg, 3.5 mmol) was added to an acetonitrile (5 mL) solution containing (tetrahydropyran-4-yl)methylamine (520 mg, 3.9 mmol) and triethylamine (500 mg, 4.3 mmol), and this was heated to reflux for 3 hours. After the reaction was complete, this was cooled to room temperature, water was added, and the precipitated crystals were filtered, washed with water and then dried. To a tetrahydrofuran solution (20 mL) of the crystals obtained was added 10% palladium-carbon (100 mg). A hydrogen atmosphere was substituted in the flask, and this was stirred overnight at room temperature. After the reaction was finished, this was filtered through Celite, and the filtrate was concentrated to yield the title compound (790 mg, 70% yield) as a white solid.

Provenance & Evidence