Bromoform → 4-(2-Bromoethyl)-2,2-dimethyl-1,3-dioxolane

Participants

Reaction Steps

To a solution of 2-(2,2-dimethyl-[1,3]dioxolan-4-yl)-ethanol (292 mg, 2 mmol) in dichloromethane (20 mL) at 0° C. was added carbon tetrabromide (796 mg, 2.4 mmol) and polymer-supported triphenyl phosphine (1 g, 3 mmol). After stirring for 1.75 hours and slowly warming to room temperature, the reaction mixture was filtered through Celite and rinsed with additional dichloromethane. The filtrate was concentrated to give the product as a mixture of product and bromoform (2:1). MS (DCI) m/e 208 (M+NH4—H2O)+; 1H NMR (300 MHz, DMSO-d6) □ 4.15 (m, 1H), 4.02 (dd, J=8.1, 6.1 Hz, 1H), 3.47-3.62 (m, 3H), 1.94-2.09 (m, 2H), 1.32 (s, 3H), 1.26 (s, 3H).

Provenance & Evidence