反应详情

Borane-dimethyl sulfide complex (9.15 ml, 96.5 mmol) is added dropwise and then faster as gas evolution slowed, to an ice-cooled mixture of 3-fluorophenyl acetic acid (XXXIX, 4.96 g, 32.2 mmol) in THF (30 ml). After 2 hr methanol is added dropwise over the course of several hours. The solvents are then removed under reduced pressure and methanol is again added and removed under reduced pressure. The methanol addition/removal is repeated three times and then the residue is partitioned between dichloromethane and aqueous sodium bicarbonate. The organic layers are dried over sodium sulfate and concentrated to give 2-(3-fluorophenyl)ethanol (LXV), MS (m/z) 140; IR (neat) 1590, 1046, 1450, 1141, 782, 1488 and 691 cm-1.

1. additionBorane-dimethyl sulfide complex (9.15 ml, 96.5 mmol) is added dropwise
2. temperaturecooled
3. customThe solvents are then removed under reduced pressure and methanol
4. additionis again added
5. customremoved under reduced pressure
6. customThe methanol addition/removal
7. customthe residue is partitioned between dichloromethane and aqueous sodium bicarbonate
8. dry with materialThe organic layers are dried over sodium sulfate
9. concentrationconcentrated