Dimethylformamide → 4-(4-methylphenoxy)benzenesulfonyl Chloride

Participants

Reaction Conditions

Reaction Steps

To a solution of 1.84 g (10.0 mmol) of 4-methyldiphenyl ether (J. Chem. Soc., Perkin Trans. 1; 1992, 407-408, which article is entirely incorporated herein by reference) with 2 mL of dichloromethane in an ice-bath was added a solution of chlorosulfonic acid (0.73 mL, 11.0 mmol) in 2 mL of dichloromethane dropwise. The resulting mixture was stirred at 0° C. to room temperature for 2 hr, and then oxalyl chloride (11.14 mL, 13.0 mmol) was added dropwise, followed by 0.15 mL of DMF. The resulting mixture was heated to 40° C. for 1 hr and then allowed to cool to room temperature over a 2 hr period. The reaction mixture was poured into ice-pH 7 phosphate buffer (50 mL), then extracted with ethyl acetate:Hexane (4:3) (3×150 mL). The combined organic layers were washed with brine (75 mL). The aqueous layer was extracted with ethyl acetate/Hexane(4:3) (150 mL). The organic layer was dried over Na2SO4, then evaporated by vacuum to give crude product as white solid. This solid was triturated with hexane and collected by filtration, then dried under high vacuum to give 1.555 g (57%) of 4-(4-methylphenoxy)benzenesulfonyl chloride as white solid: mp 295-300° C. 1H-NMR (dMSO-d6) δ 2.34 (s, 3H), 6.91-6.99 (dd, J=7.7,8.4 Hz, 4H), 7.24-7.27 (d, J=8.4 Hz, 2H), 7.61-7.63 (d, J=8.1 Hz, 2H).

Provenance & Evidence