Tetrahydrofuran → 1alpha-(tert-Butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(2-hydroxy-2-methylpropylthio)pregna-5,7,16-triene

HRID 1268497Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1268497
[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].[CH3:41][C:42]1([O:45]C1)[CH3:43].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][C:42]([OH:45])([CH3:43])[CH3:41])[CH3:22])[CH2:12][C@@H:11]([OH:40])[CH2:10]1)([C:4]([CH3:6])([CH3:5])[CH3:7])([CH3:3])[CH3:2]

Komponenten

6

Edukt 4

HCID 8028TetrahydrofuranHCID 11208Isobutylene oxideHCID 14797Potassium HydroxideHCID 12019512HCID 12019512, Verbindung

Produkt 1

HCID 120195161alpha-(tert-Butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(2-hydroxy-2-methylpropylthio)pregna-5,7,16-trieneAusbeute 82 %

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 (83.0 mg, 0.143 mmol), isobutylene oxide (113 mg, 1.56 mmol), tetrahydrofuran (0.5 ml) and 1M KOH solution in methanol (0.5 ml) were reacted and worked up, and then the residue was purified by preparative thin layer chromatography (0.5 mm×2, hexane:ethyl acetate=1:1, developed once) to give the title compound as a colorless oil (62.3 mg, 82%).

Aufarbeitung

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

Quellen und Nachweise

ORD-Eintrag
ord-51baa25390fd4afb8718f0ce468b7f73
Quelldatensatz
uspto-grants-2003_04
Patentnummer
US06555699B2

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