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

Participants

Reaction Conditions

Reaction Steps

A solution of oxalyl chloride (0.27 ml, 3.15 mmole) in dry dichloromethane (8 ml) was cooled to −78° C. Dimethyl sulfoxide (0.45 ml, 6.29 mmole) in dichloromethane (1 ml) was added dropwise maintaining the reaction temperature at −40° C. The reaction mixture was stirred for 5 minutes and a solution of (3-hydroxy-propyl)-carbamic acid tert-butyl ester (0.50 g, 2.86 mmole) in dichloromethane (3 ml) was added dropwise. After stirring for 15 minutes, triethylamine (1.99 ml, 14.3 mmole) was added and the mixture allowed to warm to ambient temperature. The reaction was quenched by adding water (10 ml), extracted with dichloromethane and the organic extracts were washed with aqueous hydrochloric acid solution (2M), saturated sodium bicarbonate solution and water. The organic layer was dried under magnesium sulfate and the solvent removed in vacuo to afford the title compound (0.45 g). 1H NMR (CDCl3) δ 9.81 (1H, s), 3.45-3.40 (2H, t, J=5 Hz), 2.72-2.69 (2H, t, J=5 Hz), 1.43 (9H, s).

Provenance & Evidence