Sodium Hydroxide → 2-[4-[2-(4,5-Diphenyl-2-oxazolyl)ethyl]phenoxy]acetic acid

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A mixture of methyl 2-[4-[2-(4,5-diphenyl-2oxazolyl]ethyl]phenoxy]acetate (5 g, 12 mmold), 5N sodium hydroxide solution (7.26 mL) and methanol (100 mL) was heated on a steam bath for 45 minutes. The solution was concentrated in vacuo diluted with water and 2N HCl solution an a white solid filtered off. Recrystallization from methanol gave 2-[4-[2-(4,5-diphenyl-2-oxazolyl)ethyl]phenoxy]acetic acid (2.88 g, 59%), m.p. 147°-149° C.

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