4-Nitrobenzoic Acid → (+)-2-Octanol

HRID 1162881Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1162881
[CH3:1][C@H:2]([OH:9])[CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[N+:29]([C:32]1[CH:40]=[CH:39][C:35]([C:36](O)=[O:37])=[CH:34][CH:33]=1)([O-:31])=[O:30].COCCOC(N=NC(OCCOC)=O)=O>C1COCC1.O>[N+:29]([C:32]1[CH:33]=[CH:34][C:35]([C:36]([O:9][C@@H:2]([CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8])[CH3:1])=[O:37])=[CH:39][CH:40]=1)([O-:31])=[O:30].[CH3:1][C@H:2]([OH:9])[CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8]

Komponenten

8

Edukt 4

HCID 61084-Nitrobenzoic AcidHCID 11776TriphenylphosphineHCID 2723888(+)-2-OctanolHCID 533844152-methoxyethyl N-(2-methoxyethoxycarbonylimino)carbamate

Produkt 2

HCID 2723888(+)-2-OctanolHCID 59520618(R)-2-(4-nitrobenzoyloxy)octane

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

After (S)-2-octanol (300 mg, 2.30 mmol), triphenylphosphine (726 mg, 2.76 mmol), 4-nitrobenzoic acid (462 mg, 2.76 mmol), and THF (12 ml) were added to a 50 ml flask, azodicarboxylic acid bis(2-methoxyethyl) ester (648 mg, 2.76 mmol) dissolved in THF (6 ml) was added dropwise thereto at 20° C., and the reaction was allowed to proceed for 2.5 hours. Water (0.5 mL) was added, and concentration was carried out. Then, water (10 ml) was added to the solution, and extraction was then 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, 10% ethyl acetate-hexane solution) to give (R)-2-(4-nitrobenzoyloxy)octane as a pale yellow liquid substance (579 mg, yield: 90%/(S)-2-octanol).

Aufarbeitung

  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, 10% ethyl acetate-hexane solution)

Quellen und Nachweise

ORD-Eintrag
ord-7ca583ffb06a428085feb6f15e325a93
Quelldatensatz
uspto-grants-2010_10
Patentnummer
US07820802B2

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