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

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Reaction Steps

A mixture of methyl E-4-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyloxyimino]-4-phenylbutyrate (1.55 g, ethanol (10 ml) and 1N aqueous sodium hydroxide (5 ml) was stirred at room temperature for 2 hours. The reaction mixture was poured into water and acidified with 1N hydrochloric acid to give E-4-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-methoxybenzyloxyimino]-4-phenylbutyric acid as crystals (1.40 g, yield 93%). Recrystallization from ethanol-isopropyl ether gave colorless prisms. m.p. 131-132 ° C.

Provenance & Evidence