Allopregnanolone → Allopregnane-3alpha,20beta-diol

HRID 232808

Reaktionsgleichung

Reaktionsgleichung von HRID 232808
[OH:1][C@@H:2]1[CH2:21][CH2:20][C@@:19]2([CH3:22])[C@@H:4]([CH2:5][CH2:6][C@@H:7]3[C@@H:18]2[CH2:17][CH2:16][C@@:15]2([CH3:23])[C@H:8]3[CH2:9][CH2:10][C@@H:11]2[C:12](=[O:14])[CH3:13])[CH2:3]1.[BH4-].[Na+]>CO.ClCCl>[OH:1][C@@H:2]1[CH2:21][CH2:20][C@@:19]2([CH3:22])[C@@H:4]([CH2:5][CH2:6][C@@H:7]3[C@@H:18]2[CH2:17][CH2:16][C@@:15]2([CH3:23])[C@H:8]3[CH2:9][CH2:10][C@@H:11]2[C@H:12]([OH:14])[CH3:13])[CH2:3]1

Komponenten

5

Edukt 2

HCID 92786AllopregnanoloneHCID 4311764Sodium borohydride

Produkt 1

HCID 22868516Allopregnane-3alpha,20beta-diol

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a stirred solution of 3α-hydroxy-5α-pregnan-20-one (3.2g, 318.5 g/m, 10 mmol) in 160 mL of methanol and 30 mL of dichloromethane at room temperature was slowly added sodium borohydride (3.3 g, 37.8 g/m, 87 mmol) over a period of 2 h. The mixture was stirred for an additional hour and then poured into ice cold water (700 mL) and extracted three times with ether. The combined organic phase was washed several times with water, dried over magnesium sulfate and concentrated to a white solid (2.35 g, 320.5 g/m, 7.3 mmol, 73%).

Aufarbeitung

  1. customat room temperature
  2. customof 2 h
  3. extractionextracted three times with ether
  4. washThe combined organic phase was washed several times with water
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated to a white solid (2.35 g, 320.5 g/m, 7.3 mmol, 73%)

Quellen und Nachweise

ORD-Eintrag
ord-736c3ce8e07940ef91b73f6ee677b435
Quelldatensatz
uspto-grants-1997_01
Patentnummer
US05591733

Verknüpfte Notizen

Wird geladen…