反应详情

温度

50 °C

To a mixture of ethyl {4-[4-({2-methoxy-4-[({4-[(E)-2-(2-methyl-1,3-thiazol-4-yl)ethenyl]-1-phenyl-1H-pyrazol-3-yl}oxy)methyl]phenoxy}methyl)-5-methyl-1,3-oxazol-2-yl]phenyl}acetate (0.48 g), tetrahydrofuran (12 mL) and ethanol (3 mL) was added 1N aqueous sodium hydroxide solution (2 mL), and the mixture was stirred at 50° C. for 2 hrs. To the reaction mixture were added 1N hydrochloric acid (2 mL) and water, and the precipitated crystals were collected by filtration to give {4-[4-({2-methoxy-4-[({4-[(E)-2-(2-methyl-1,3-thiazol-4-yl)ethenyl]-1-phenyl-1H-pyrazol-3-yl}oxy)methyl]phenoxy}methyl)-5-methyl-1,3-oxazol-2-yl]phenyl}acetic acid as crystals (0.44 g, yield 96%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 181-182° C.

1. filtrationthe precipitated crystals were collected by filtration