Dichloromethane → HCID 16093753, compound

Participants

Reaction Conditions

Reaction Steps

Aluminium chloride (19.4 g, 0.15 mol) is added all at once to a solution of 3-methyl-1-(4-methylbenzenesulphonyl)-1H-pyrrole (13.0 g, 55.3 mmol) in 1,2-dichloroethane (230 mL) at ambient temperature. After stirring for 20 minutes, cyanogen bromide (11.11 g, 0.10 mol) is added in portions over a period of 20 minutes. After 4.5 hours, an additional amount of cyanogen bromide (1.94 g, 18.3 mmol) is added. After stirring for 17 hours at ambient temperature, the reaction mixture is poured slowly into a mixture of dichloromethane (300 mL) and water (600 mL) cooled to 0° C. The resulting mixture is stirred for 1 hour. Subsequently the phases are separated and the aqueous phase is extracted with dichloromethane (3×150 mL). The combined organic phases are washed with water (2×150 mL) and brine (150 mL). The organic phase is dried over Na2SO4, filtered and concentrated in vacuo to obtain the expected compound in the form of a solid.

Provenance & Evidence