Dimethyl Sulfoxide → 2,3,4,5-Tetrahydro-1-benzoxepin-6-carboxaldehyde

Participants

Reaction Conditions

Reaction Steps

DMSO (1.85 ml, 26 mmol) was added slowly to a -78° C. solution of oxalyl chloride in methylene chloride (10 ml of 2 M, 20 mmol). To this solution was added slowly a solution of 2,3,4,5-tetrahydrobenzoxepin-4-methanol (2.3 g, 13 mmol) in methylene chloride, and the mixture was stirred 30 min at -78° C. Triethyl amine (7.53 ml, 52 mmol) was added slowly to the reaction mixture, which was then allowed to warm to room temperature. The mixture was diluted with methylene chloride (50 ml) and washed with water and then brine. The organic layer was concentrated in vacuo to an oil (2.28 g, 100%).

Provenance & Evidence