反应详情

Sodium hydride (60%, oily, 0.17 g) was added to a mixture of ethyl diethylphosphonoacetate (1.00 g) and N,N-dimethylformamide (5 ml) at 0° C., and the mixture was stirred at room temperature for 30 minutes. A solution of 1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-4-phenylpyrrole-3-carbaldehyde (1.65° g) in N,N-dimethylformamide (10 ml) was added slowly to the mixture, which was stirred at room temperature for 3 hours. The reaction mixture was poured into water, which was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated aqueous sodium chloride solution, dried (MgSO4), then concentrated. The residue was subjected to silica gel column chromatograpy, and ethyl(E)-3-[1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-4-(2-pyridyl)-3-pyrrolyl]propenoate (1.83 g, yield: 96%) was obtained as an oily substance from the fraction eluted with ethyl acetate-hexane (1:1 volume ratio).

1. stirringwas stirred at room temperature for 3 hours
2. extractionwas extracted with ethyl acetate
3. washThe ethyl acetate layer was washed with saturated aqueous sodium chloride solution
4. dry with materialdried (MgSO4)
5. concentrationconcentrated