Hydrogen Peroxide → (1RS,3RS,4RS)-3-(3,4-dimethoxyphenyl)-4-nitrocyclohexanol

HRID 334348

Reaktionsgleichung

[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11]2[CH:16]([N+:17]([O-:19])=[O:18])[CH2:15][CH2:14][C:13](=[O:20])[CH2:12]2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].C([BH-](C(CC)C)C(CC)C)(CC)C.[K+].OO.P([O-])([O-])([O-])=O>O1CCCC1.C(OCC)(=O)C>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11]2[CH:16]([N+:17]([O-:19])=[O:18])[CH2:15][CH2:14][CH:13]([OH:20])[CH2:12]2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10]

Komponenten

Reaktionsbedingungen

Temperatur: 78 °C

Versuchsvorschrift

Under nitrogen atmosphere 16.76 g of (3RS,4SR)-3-(3,4-dimethoxyphenyl)-4-nitrocyclohexanone (compound F2) are dissolved in 300 ml of tetrahydrofurane, the solution is cooled to 78° C., and 75 ml of 1 M solution of potassium tri-sec-butylborohydride in tetrahydrofurane is added dropwise. After stirring for further 1 h, a mixture consisting of 30% hydrogen peroxide solution and phosphate buffer solution is added. Stirring is continued for further 10 min, the reaction mixture is diluted with 400 ml of ethyl acetate and the aqueous layer is extracted with ethyl acetate, the combined organic phases are concentrated to give a foam, which is purified by chromatography on silica gel using a mixture of petroleum ether/ethyl acetate in the ratio 1/1 to furnish 10.18 g (60% of theory) of the title compound.

Aufarbeitung

additionis added
stirringStirring
waitis continued for further 10 min
extractionthe aqueous layer is extracted with ethyl acetate
concentrationthe combined organic phases are concentrated
customto give a foam, which
customis purified by chromatography on silica gel using
additiona mixture of petroleum ether/ethyl acetate in the ratio 1/1

Quellen und Nachweise

ORD-Eintrag: ord-c08233194c3142b88d6298b05a8b49fd
Quelldatensatz: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08883818B2

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