Tetrahydrofuran → 1alpha-(tert-butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(4-ethyl-4-hydroxyhexylthio)pregna-5,7,16-triene

HRID 1268499Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1268499
[Si:1]([O:8][C@@H:9]1[C@@:37]2([CH3:38])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:36]2[CH2:35][CH2:34][C@@:33]2([CH3:39])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([S:23][C:24](OC2C=CC=CC=2)=O)[CH3:22])[CH2:12][C@@H:11]([OH:40])[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].BrC[CH2:43][CH2:44][C:45]([CH2:49][CH3:50])([OH:48])[CH2:46][CH3:47].O1CCCC1.[OH-].[K+]>CO>[Si:1]([O:8][C@@H:9]1[C@@:37]2([CH3:38])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:36]2[CH2:35][CH2:34][C@@:33]2([CH3:39])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([S:23][CH2:24][CH2:43][CH2:44][C:45]([CH2:49][CH3:50])([OH:48])[CH2:46][CH3:47])[CH3:22])[CH2:12][C@@H:11]([OH:40])[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:2])[CH3:3]

Komponenten

6

Edukt 4

HCID 8028TetrahydrofuranHCID 14797Potassium HydroxideHCID 12019512HCID 12019512, VerbindungHCID 124762166-Bromo-3-ethylhexan-3-ol

Produkt 1

HCID 120195181alpha-(tert-butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(4-ethyl-4-hydroxyhexylthio)pregna-5,7,16-trieneAusbeute 89,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

Under the same conditions as in Example 3, 1α-(tert-butyldimethylsilyloxy)-3β-hydroxy-20(S)-phenoxycarbonylthiopregna-5,7,16-triene (84.3 mg, 0.145 mmol), 6-bromo-3-ethyl-3-hexanol (152 mg, 0.725 mmol), tetrahydrofuran (1 ml) and 1M KOH solution in methanol (1 ml) were reacted and worked up, and then the residue was purified by preparative thin layer chromatography (0.5 mm×2, hexane:ethyl acetate=2:1, developed twice) to give 76.4 mg of a product, which was directly used in the subsequent reaction because it was difficult to separate from 6-bromo-3-ethyl-3-hexanol.

Aufarbeitung

  1. customthe residue was purified by preparative thin layer chromatography (0.5 mm×2, hexane

Quellen und Nachweise

ORD-Eintrag
ord-8d37fdc057314879a207a6804f73b69f
Quelldatensatz
uspto-grants-2003_04
Patentnummer
US06555699B2

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