4'-Methoxyacetophenone → 1-(4-Methoxyphenyl)ethanol

A 30-mL eggplant flask equipped with a magnetic stirrer was heat dried while pumping to a vacuum of 5 Pa before its interior was purged with nitrogen atmosphere. To the flask, 4-methoxyacetophenone (151 mg, 1.0 mmol) and 1,1,1,3,3-pentamethyldisiloxane (372 mg, 2.5 mmol) were added through a syringe, and dissolved in benzene (0.5 mL). To the solution, iron complex A (5.0 mg, 0.01 mmol) was added as catalyst. The solution was stirred at room temperature for 6 hours. At 0° C., tetrabutylammonium fluoride in THF (1 M, 1 mL) was then added to the solution, which was stirred at 0° C. for 1 hour. The solvents were distilled off in vacuum. The crude product was purified by silica gel-packed column chromatography using hexane/ethyl acetate (3/1) as developing solvent, obtaining 1-(4-methoxyphenyl)ethanol (140 mg, 0.92 mmol, 92%). The results are shown as Entry 1 in Table 7. The resulting alcohol was identified for geometry by 1H and 13C-NMR spectroscopy.

1. customA 30-mL eggplant flask equipped with a magnetic stirrer
2. temperaturewas heat
3. customdried
4. customwas purged with nitrogen atmosphere
5. additionTo the solution, iron complex A (5.0 mg, 0.01 mmol) was added as catalyst
6. stirringwas stirred at 0° C. for 1 hour
7. distillationThe solvents were distilled off in vacuum
8. customThe crude product was purified by silica gel-

ORD record

ord-28a27c517c2d4a628ee1aeec73e23ae0

Source dataset

uspto-grants-2016_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09421532B2