反应详情

A solution of methyl 6-ethylaminonicotinoate (15.2 g, 84.4 mmol) in DMF (50 ml) was cooled to 0 ° C. and treated with sodium hydride (60%, 75 mmol). The reaction was stirred for 1 hour and a solution of 2-benzyloxy-5-bromobenzylbromide (25 g, 70.2 mmol) in DMF (50 ml) added. The reaction was allowed to warm to ambient temperature and stirred for 18 hours. The reaction was quenched with water and extracted with ethyl acetate (three times). The organic layers were combined, washed with water and brine twice, dried (MgSO4) and evaporated to give a white solid. Recrystallisation from ethyl acetate/hexane gave methyl-2-[N-(2-benzyloxy-5-bromobenzyl)-N-ethylamino]pyridine-5-carboxylate (22.7 g, 71%).

1. stirringstirred for 18 hours
2. customThe reaction was quenched with water
3. extractionextracted with ethyl acetate (three times)
4. washwashed with water and brine twice
5. dry with materialdried (MgSO4)
6. customevaporated
7. customto give a white solid
8. customRecrystallisation from ethyl acetate/hexane