反应详情

To a tetrahydrofuran (4 mL) solution of (6-phenoxy-benzofuran-2-yl)-methanol (177 mg, 737 μmol) described in Production Example 49-1-2 were added phthalimide (119 mg, 811 μmol), triphenylphosphine (232 mg, 884 μmol) and diethylazodicarboxylate (403 μL, 884 mmol) at 0° C., which was stirred at room temperature for 4 hours and 30 minutes. Water was added to the reaction solution followed by extraction with ethyl acetate. The organic layer was washed with sat. NaCl followed by drying over anhydrous magnesium sulfate and filtering. The filtrate was concentrated under a reduced pressure and the residue was purified by NH silica gel column chromatography (hexane:ethyl acetate=5:1) to obtain the title compound (209 mg, 77%) as a colorless oil.

1. extractionfollowed by extraction with ethyl acetate
2. washThe organic layer was washed with sat. NaCl
3. dry with materialby drying over anhydrous magnesium sulfate
4. filtrationfiltering
5. concentrationThe filtrate was concentrated under a reduced pressure
6. customthe residue was purified by NH silica gel column chromatography (hexane:ethyl acetate=5:1)