反应详情

A mixture of 4-(4-chloromethylphenoxy)methyl-5-methyl-2-phenyloxazole (3.55 g), ethyl 1H-pyrazol-4-carboxylate (1.50 g), potassium carbonate (2.76 g), and N,N-dimethylformamide (25 ml) was stirred at room temperature for 24 hours. The reaction mixture was poured into water, which was extracted with ethyl acetate. The ethyl acetate layer was washed with water, then, with saturated aqueous sodium chloride solution, dried (MgSO4) and concentrated. The obtained crystals were collected by filtration, and ethyl 1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-1H-pyrazol-4-carboxylate (3.79 g, yield: 91%) was obtained. This was recrystallized from ethyl acetate-hexane. Melting point: 108–109° C.

1. extractionwas extracted with ethyl acetate
2. washThe ethyl acetate layer was washed with water
3. dry with materialwith saturated aqueous sodium chloride solution, dried (MgSO4)
4. concentrationconcentrated
5. filtrationThe obtained crystals were collected by filtration