反应详情

To a solution of methyl 6-(dibenzylamino)-3-[(1E)-3-methoxy-3-oxoprop-1-en-1-yl]pyridine-2-carboxylate (2.60 g, 6.24 mmol) and nickel(II) chloride hexahydrate (891 mg, 3.75 mmol) in methanol (62 mL) was added sodium tetrahydroborate (472 mg, 12.5 mmol) under ice-cooling, and the mixture was stirred for 5 min. The reaction solution was diluted with saturated aqueous ammonium chloride solution, and the organic solvent was evaporated under reduced pressure. The residue was diluted with ethyl acetate, washed with saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane=10/90→30/70) to give the title compound (2.24 g, yield 86%).

1. temperaturecooling
2. customthe organic solvent was evaporated under reduced pressure
3. additionThe residue was diluted with ethyl acetate
4. washwashed with saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. customThe solvent was evaporated under reduced pressure
7. customthe residue was purified by silica gel column chromatography (ethyl acetate/hexane=10/90→30/70)