反应详情

A mixture of compound D (8.0 g; 21 mmol), N-bromosuccinimide (4.53 g; 25 mmol) and azo(bisisobutyronitrile) (73 mg) in methyl chloroform (50 ml) was heated at reflux for 4 hours. The mixture was cooled to ambient temperature, washed with water (3×50 ml), and the suspended solid collected by filtration to give 5-(4'-bromomethylbiphenyl-2-yl)-1-(4-nitrophenyl)-1H-tetrazole (E) (7.3 g), m.p 192°-195° C.; NMR (CDCl3): 4.4(2H, s), 6.52(2H, d), 6.85(2H, d), 7.07(2H, d), 7.4(1H, d), 7.7(2H, m), 7.9(1H, d).

1. temperaturewas heated
2. temperatureat reflux for 4 hours
3. washwashed with water (3×50 ml)
4. filtrationthe suspended solid collected by filtration