Dimethyl Sulfoxide → 3-Hexyl-4-methoxybenzaldehyde

Participants

Reaction Steps

A crude product of (3-hexyl-4methoxyphenyl)methanol, dimethyl sulfoxide (DMSO, 1.5 ml) and triethylamine (0.46 ml, 3.3 mmol) were mixed in a stream of argon. To this solution was added sulfur trioxide-pyridine complex (159 mg, 1 mmol) under ice-cooling, and the mire was stirred at room temperature for 1 hour. This reaction mixture was poured into water (20 ml) to stop the reaction. The aqueous layer was extracted 3 times with ethyl acetate (20 ml). The organic layer was washed successively with 2N hydrochloric acid (20 ml), water (20 ml) and saturated brine (30 ml). This solution was dried over anhydrous magnesium sulfate, and the drying agent was filtered off. The filtrate was concentrated under reduced pressure, and the obtained residue was purified by column chromatography (hexane/ethyl acetate=1/1) to give 3-hexyl-4-methoxybenzaldehyde (75.4 mg, 92% in 2 steps) as a colorless oil.

Provenance & Evidence