反应详情

To a suspension of N-(4-chlorophenyl)-2-[((5-methyl-3-chlorothiophen-2-yl)carbonyl)amino]-5-chlorobenzamide (2.6 g, 6.0 mmol) in dry benzene (250 mL) were added N-bromosuccinimide (1.2 g, 6.6 mmol) and benzoyl peroxide (0.15 g, 0.6 mmol). The mixture was refluxed while irradiating with a 250 Watt lamp. After 28 hours the reaction was concentrated of all volatiles in vacuo and the resulting solid triturated with benzene. Purification by flash chromatography on silica gel afforded 2.3 g (75% yield) of N-(4-chlorophenyl)-2-[((5-bromomethyl-3-chlorothiophen-2-yl)carbonyl)amino]-5-chlorobenzamide as a white solid; NMR (DMSO-d6) 11.1 (s, 1), 10.7 (s, 1), 8.3 (d, 1), 7.9 (s, 1), 7.7 (d, 2), 7.6 (d, 1), 7.4 (d, 2), 7.3 (s, 1), 4.9 (s, 2) ppm.

1. temperatureThe mixture was refluxed
2. customwhile irradiating with a 250 Watt lamp
3. concentrationAfter 28 hours the reaction was concentrated of all volatiles in vacuo
4. customthe resulting solid triturated with benzene
5. customPurification by flash chromatography on silica gel