反应详情

To a suspension of 3-(6-hydroxy-pyridin-3-yloxy)-benzoic acid ethyl ester (0.20 g, 0.77 mmol), [3-(2,6-dichloro-phenyl)-5-isopropyl-isoxazol-4-yl]-methanol (0.22 g, 0.77 mmol), triphenylphosphine (0.242 g, 0.92 mmol) in benzene (10 ml) was added dropwise diisopropyldiazenedicarboxylate (0.202 g, 1.00 mmol). The reaction mixture was stirred at room temperature for 4 h and concentrated under reduced pressure. The resulting residue was further purified by column chromatography using silica (eluent hexanes-ethyl acetate 5:1) to give 0.167 g (41%) of 3-{6-[3-(2,6-dichloro-phenyl)-5-isopropyl-isoxazol-4-ylmethoxy]-pyridin-3-yloxy}-benzoic acid ethyl ester as colorless oil.

1. concentrationconcentrated under reduced pressure
2. customThe resulting residue was further purified by column chromatography