Dimethyl Sulfoxide → tert-Butyl N-(3-oxopropyl)carbamate

Participants

Reaction Conditions

Reaction Steps

A solution of oxalyl dichloride (597 μl) in dry dichloromethane (7 ml) was cooled to −70° C. in nitrogen atmosphere, and a solution of dimethylsulfoxide (1.15 ml) in dry dichloromethane (1.5 ml) was added slowly and stirred for 30 minutes at −70° C. To the reaction mixture was added a solution of (3-hydroxypropyl)carbamic acid tert-butyl ester (1.0 g) in dry dichloromethane (7 ml) slowly to maintain the reaction temperature at −60° C. and stirred for 30 minutes at −70° C. To the reaction mixture was added triethylamine (3.98 ml) slowly to maintain the reaction temperature at −60° C. Then the reaction mixture was allowed to warm to room temperature. To the reaction mixture was added water (10 ml) and stirred for 10 minutes, then the organic layer was separated. The aqueous layer was extracted with dichloromethane (50 ml×2). The organic layer was combined and washed with brine, dried over magnesium sulfate. Magnesium sulfate was filtered off, and the filtrate was evaporated under reduced pressure to give 3-tert-butoxycarbonylaminopropionaldehyde (1.28 g), that was used crude in the next reaction.

Provenance & Evidence