反应详情

To a suspension of lithium aluminum hydride (1.0 g) dispersed in THF (10 ml) was added dropwise at room temperature a solution of 4-(4′-fluorobenzoyl)isophthalic acid (3.0 g) in THF (30 ml), and the mixture was stirred for 10 hr. To the reduced reaction mixture was added 10% hydrochloric acid (10 ml) and the mixture was passed through celite. THF was evaporated under reduced pressure, and 85% phosphoric acid (10 g) was added. The mixture was stirred at 60° C. for 5 hr. To the reaction mixture was added water (50 ml) and the resulting crystals were collected by filtration and dried. The objective compound was separated by silica gel column chromatography to give 1-(4′-fluorophenyl)-1,3-dihydroisobenzofuran-5-ylmethanol (0.21 g, 8%). The various spectrum data of the crystals were the same as those obtained in Example 12

1. customTHF was evaporated under reduced pressure, and 85% phosphoric acid (10 g)
2. additionwas added
3. stirringThe mixture was stirred at 60° C. for 5 hr
4. additionTo the reaction mixture was added water (50 ml)
5. filtrationthe resulting crystals were collected by filtration
6. customdried
7. customThe objective compound was separated by silica gel column chromatography