Dimethylformamide → 3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}benzyl)oxy]-1-phenyl-1H-pyrazole-4-carbaldehyde

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-[(4-chloromethylphenoxy)methyl]-2-(2-furyl)-5-methyloxazole (3.01 g), 3-hydroxy-1-phenyl-1H-pyrazole-4-carbaldehyde (1.70 g), potassium carbonate (1.24 g) and N,N-dimethylformamide (100 mL) was stirred at 90° C. for 2 hrs. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to give 3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}benzyl)oxy]-1-phenyl-1H-pyrazole-4-carbaldehyde as colorless crystals (2.66 g, 65%) from a fraction eluted with ethyl acetate-hexane (1:2, v/v). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 148-149° C.

Provenance & Evidence