Hydrogen Peroxide → 2-(2-Hydroxyethyl)-5,6,7-trimethoxynaphthalene

5,6,7-Trimethoxy-2-vinylnaphthalene (1.215 g) was dissolved in dry THF (10 mL) under an argon atmosphere, a THF solution (4.7 mL) of 1 M borane was added dropwise to the solution at 0° C., and the mixture was stirred at room temperature for 2 hours. Water (4 mL) was added to the reaction mixture at 0° C., and an aqueous solution (1.2 mL) of 4 M sodium hydroxide was then added. 31% Aqueous hydrogen peroxide (0.5 mL) was added to the reaction mixture at 0° C., and the mixture was stirred at 50° C. for 50 minutes. The reaction mixture was concentrated under reduced pressure, and water was added to the residue to conduct extraction with ethyl acetate. The resultant organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (ethyl acetate:hexane=1:8) to obtain the title compound.

1. stirringthe mixture was stirred at 50° C. for 50 minutes
2. concentrationThe reaction mixture was concentrated under reduced pressure, and water
3. additionwas added to the residue
4. extractionextraction with ethyl acetate
5. washThe resultant organic layer was washed with water and saturated brine
6. dry with materialdried over anhydrous magnesium sulfate
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by column chromatography on silica gel (ethyl acetate:hexane=1:8)

ORD record

ord-076561abafa24bd79753f2a57822585a

Source dataset

uspto-grants-2003_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06552188B2