Sodium borohydride → 1-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-ethanol

HRID 1609116Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1609116
[CH3:1][C:2]1[C:3]([C:16]([C:18]2C(C)=CC3C(C)(C)CCC(C)(C)C=3C=2)=[O:17])=[CH:4][C:5]2[C:6]([CH3:15])([CH3:14])[CH2:7][CH2:8][C:9]([CH3:13])([CH3:12])[C:10]=2[CH:11]=1.[BH4-].[Na+]>CO>[CH3:1][C:2]1[C:3]([CH:16]([OH:17])[CH3:18])=[CH:4][C:5]2[C:6]([CH3:15])([CH3:14])[CH2:7][CH2:8][C:9]([CH3:13])([CH3:12])[C:10]=2[CH:11]=1

Komponenten

4

Edukt 2

HCID 4311764Sodium borohydrideHCID 22990221HCID 22990221, Verbindung2×

Produkt 1

HCID 49833401-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-ethanol

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a solution of 4.17 g (17.1 mmol) of methyl [3,5,5,8,8-pentamethyl(5,6,7,8-tetrahydronaphthalen-2-yl] ketone (Compound 10) in methanol at 0° C. was portionwise added 0.77 g (20.4 mmol) of sodium borohydride and the resulting suspension stirred at 0° C. for 4 hours. Solvent was removed in-vacuo and the resulting :solid taken-up in water, acidified using 1N HCl, and extracted three times with ether. The ether extracts were washed with water, brine and dried (MgSO4). The solvent was removed in-vacuo and resulting residue purified using flash chromatography (SiO2, 10% ethyl acetate in hexanes) to give a single isomer: the title compound as a white solid.

Aufarbeitung

  1. customat 0° C.
  2. customSolvent was removed in-vacuo
  3. extractionextracted three times with ether
  4. washThe ether extracts were washed with water, brine
  5. dry with materialdried (MgSO4)
  6. customThe solvent was removed in-vacuo
  7. customresulting residue
  8. custompurified
  9. customto give a single isomer

Quellen und Nachweise

ORD-Eintrag
ord-4ecc95b7fe0a42e683b9ba126278af0d
Quelldatensatz
uspto-grants-1995_03
Patentnummer
US05399586

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