Sodium hydride → Methyl 2-(5-methyl-2-phenyl-4-oxazolyl)methoxy-4-pyridinecarboxylate

Participants

Reaction Steps

To a mixture of (5-methyl-2-phenyl-4-oxazolyl)methanol (9.46 g) and N,N-dimethylformamide (0.50 mL) was added sodium hydride (60%, oil, 2.40 g) at room temperature and the reaction mixture was stirred at room temperature until generation of hydrogen ended. The mixture was added to a solution of methyl 2-chloropyridine-4-carboxylate (8.58 g) in tetrahydrofuran (50 ml) at room temperature and the resulting mixture was further stirred at room temperature for 1 hr. Water was added to the reaction mixture and the mixture was extracted with ethyl acetate. The organic layer was washed successively with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated. The obtained residue was subjected to silica gel column chromatography to give crystals of methyl 2-(5-methyl-2-phenyl-4-oxazolyl)methoxy-4-pyridinecarboxylate from a fraction eluted with ethyl acetate-hexane (1:3, v/v). Recrystallization from ethyl acetate-hexane gave colorless needle crystals (2.19 g, 14%). melting point: 106-107° C.

Provenance & Evidence