Hydrochloric Acid → methyl (4E)-4-[[4-[[2-(furan-2-yl)-5-methyl-1,3-oxazol-4-yl]methoxy]-3-methoxyphenyl]methoxyimino]-4-phenylbutanoate

関与物質

反応手順

To a stirred solution of 4-(4-chloromethyl-2-methoxyphenoxymethyl)-2-(2-furyl)-5-methyloxazole (1.65 g) and methyl E-4-hydroxyimino-4-phenylbutyrate (1.04 g) in N,N-dimethylformamide (20 ml) was added sodium hydride (60% in oil, 200 mg) at 0° C. After stirring for 1 hour, the reaction mixture was poured into water, neutralized with 1N hydrochloric acid, and extracted with ethyl acetate. The extract was washed with water, dried (MgSO4), and concentrated. The residue was purified by column chromatography on silica gel. Elution with ethyl acetate-hexane (1:4, v/v) gave methyl E-4-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyloxyimino]-4-phenylbutyrate (1.60 g, yield 64%) as crystals. Recrystallization from ethyl acetate-hexane gave pale yellow prisms. m.p. 67-69° C.

情報源と証拠