反应详情

A mixture of ethyl 1-[3-[4-[2-[(E)-2-phenylethenyl]-4-oxazolylmethoxy]phenyl]propyl]-2-imidazolecarboxylate (300 mg), 1N aqueous sodium hydroxide (1.32 ml) and tetrahydrofuran (3 ml) was stirred for 2 hours at room temperature. To the reaction mixture were added 1N hydrochloric acid (1.32 ml) and then water. The resulting crystalline precipitate was collected by filtration and washed with ether. Recrystallization from tetrahydrofuran gave 1-[3-[4-[2-[(E)-2-phenylethenyl]-4-oxazolylmethoxy]-phenyl]propyl]-2-imidazolecarboxylic acid (176 mg, 63%) as colorless prisms, mp 116° C. (decomp.).

1. filtrationThe resulting crystalline precipitate was collected by filtration
2. washwashed with ether
3. customRecrystallization from tetrahydrofuran