Dimethyl Sulfoxide → 3-Methoxy-2-(pentyloxy)benzaldehyde

Participants

Reaction Conditions

Reaction Steps

The crude product of (3-methoxy-2-pentyloxyphenyl)methanol (1.2 g), dimethyl sulfoxide (DMSO, 25 ml) and triethylamine (6.72 ml, 48.2 mmol) were mixed, and this solution was cooled to 0° C. Sulfur trioxide--pyridine complex (2.56 g, 16.1 mmol) was added, and the mixture was stirred at room temperature for 1 hour. The reaction mixture was poured into water to stop the reaction, and the aqueous layer was extracted 3 times with ethyl acetate (30 ml). The organic layers were combined, washed with 2N hydrochloric acid (30 ml), water (30 ml) and saturated brine (30 ml), and dried over anhydrous magnesium sulfate. The drying agent was filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by column chromatography (hexane/ethyl acetate=15/1-10/1) to give 3-methoxy-2-pentyloxybenzaldehyde (1.16 g, 83% in 3 steps) as a colorless oil.

Provenance & Evidence