Dimethyl Sulfoxide → 3-(1-Dodecyl)-5-isoxazolecarboxaldehyde

Participants

Reaction Conditions

Reaction Steps

A solution of oxalyl chloride (28.8 ml) in dry dichloromethane (100 ml) was cooled to -60° C. and a solution of dimethylsulfoxide (8.9 ml) in dichloromethane (30 ml) was added, followed by a slurry of 3-(1-dodecyl)-5-isoxazolemethanol (14.0 g) in dry dichloromethane (200 ml). The mixture was stirred at -60° C. for 1 hr, quenched with triethylamine (87 ml) and allowed to warm to room temperature. The solution was poured into water (300 ml) and extracted with dichloromethane. The organic phases were washed with dilute citric acid solution, dried, filtered, and the filtrate was evaporated. The residue was passed through a short pad of silica gel using dichloromethane as the eluent. The solution was evaporated and the residue was recrystallized from ether-hexane to give 11.5 g (78%) of product, mp 53°-54° C.

Provenance & Evidence