反应详情

In 30 ml of N,N-dimethylformamide were dissolved 2 g of dimethyl 4-[2-(2-aminoethoxy)-5-nitrophenyl]-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate and 0.6 g of styrene oxide, and the solution thus formed was allowed to stand for 2 days at room temperature. The reaction solution was concentrated under reduced pressure, and the residue was subjected to silica gel column chromatography. The product was eluted with chloroform-methanol (95:5 v/v). Crude crystals were recrystallized from ethyl acetate to give 500 mg of dimethyl 4-[2-[2-(β-hydroxyphenethylamino)ethoxy]-5-nitrophenyl]-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate.

1. customthe solution thus formed
2. concentrationThe reaction solution was concentrated under reduced pressure
3. washThe product was eluted with chloroform-methanol (95:5 v/v)
4. customCrude crystals were recrystallized from ethyl acetate