Tetrahydrofuran → 1alpha-(tert-butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(4-ethyl-4-hydroxy-2-hexynylthio)pregna-5,7,16-triene

HRID 2268300Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2268300
[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(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].Br[CH2:42][C:43]#[C: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][CH2:42][C:43]#[C: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])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

Komponenten

6

Edukt 4

HCID 8028TetrahydrofuranHCID 14797Potassium HydroxideHCID 12019512HCID 12019512, VerbindungHCID 220276876-Bromo-3-ethyl-4-hexyn-3-ol

Produkt 1

HCID 120200451alpha-(tert-butyldimethylsilyloxy)-3beta-hydroxy-20(S)-(4-ethyl-4-hydroxy-2-hexynylthio)pregna-5,7,16-trieneAusbeute 63 %

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 (60.8 mg, 0.105 mmol), 6-bromo-3-ethyl-4-hexyn-3-ol (108 mg, 0.525 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, dichloromethane:ethyl acetate=5:1, developed twice) to give the title compound as a colorless oil (38.4 mg, 63%).

Aufarbeitung

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

Quellen und Nachweise

ORD-Eintrag
ord-3d83dd247a9c45c1adf3f8e48f1f6531
Quelldatensatz
uspto-grants-2001_12
Patentnummer
US06326503B1

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