反应详情

A mixture of ethyl 2-methyl-4-(3-nitrophenyl)-6-phenyl-3-pyridinecarboxylate (5 g), N-bromosuccinimide (5.9 g) and benzoyl peroxide (0.1 g) in carbon tetrachloride (200 ml) was refluxed for 5 hours. The reaction mixture was poured into ice water (100 ml). The separated organic layer was washed with saturated aqueous sodium hydrogen carbonate and saturated aqueous sodium chloride successively, dried over magnesium sulfate and evaporated in vacuo. The residue was subjected to a column chromatography on silica gel eluting with a mixture of n-hexane and chloroform (1:2 V/V). The fractions containing the desired compound were combined and evaporated in vacuo to give ethyl 2-bromomethyl-4-(3-nitrophenyl)-6-phenyl-3-pyridinecarboxylate (2 g).

1. temperaturewas refluxed for 5 hours
2. washThe separated organic layer was washed with saturated aqueous sodium hydrogen carbonate and saturated aqueous sodium chloride successively
3. dry with materialdried over magnesium sulfate
4. customevaporated in vacuo
5. additionThe residue was subjected to a column chromatography on silica gel eluting with a mixture of n-hexane and chloroform (1:2 V/V)
6. additionThe fractions containing the desired compound
7. customevaporated in vacuo