Phenol → Phenol

After phenol (300 mg, 3.19 mmol), triphenylphosphine (1006 mg, 3.83 mmol), (2R,4R)-2,4-pentanediol (399 mg, 3.83 mmol), and THF (12 ml) were added to a 50 ml flask, a 40% azodicarboxylic acid diisopropyl ester-toluene solution (2.01 ml, 3.83 mmol) dissolved in THF (6 ml) was added dropwise thereto at 20° C., and the reaction was allowed to proceed for 21 hours. Water (0.5 ml) was added, and concentration was carried out. Then, water (10 ml) was added to the solution, and extraction was carried out using diethyl ether (10 ml, ×2). Then, the organic layer was washed with water (10 ml) and saturated salt water (10 ml), and dehumidified with anhydrous magnesium sulfate. Subsequently, a crude product obtained by concentration was purified by column chromatography (silica gel, 40% ethyl acetate-hexane solution) to give (4S,2R)-4-phenoxypentane-2-ol as a colorless oily substance (461 mg, yield: 80%/phenol).

1. additionwas added dropwise
2. customat 20° C.
3. concentrationconcentration
4. additionThen, water (10 ml) was added to the solution, and extraction
5. washThen, the organic layer was washed with water (10 ml) and saturated salt water (10 ml)
6. customSubsequently, a crude product obtained by concentration
7. customwas purified by column chromatography (silica gel, 40% ethyl acetate-hexane solution)

ORD record

ord-625a0b6ff44d49129e9aa064a63785c0

Source dataset

uspto-grants-2011_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07947816B2