Tetrabutylammonium Fluoride → 1alpha,3beta-dihydroxy-20(R)-{(E)-(4-ethyl-4-hydroxy-2-hexenyloxy)}pregna-5,7,16-triene

HRID 2268334Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2268334
[Si]([O:8][C@@H:9]1[C@@:44]2([CH3:45])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:43]2[CH2:42][CH2:41][C@@:40]2([CH3:46])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@H:21]([O:23][CH2:24]/[CH:25]=[CH:26]/[C:27]([CH2:38][CH3:39])([O:30][Si](CC)(CC)CC)[CH2:28][CH3:29])[CH3:22])[CH2:12][C@@H:11]([O:47][Si](C(C)(C)C)(C)C)[CH2:10]1)(C(C)(C)C)(C)C.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[OH:8][C@@H:9]1[C@@:44]2([CH3:45])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:43]2[CH2:42][CH2:41][C@@:40]2([CH3:46])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@H:21]([O:23][CH2:24]/[CH:25]=[CH:26]/[C:27]([CH2:38][CH3:39])([OH:30])[CH2:28][CH3:29])[CH3:22])[CH2:12][C@@H:11]([OH:47])[CH2:10]1

Komponenten

4

Edukt 2

HCID 2724141Tetrabutylammonium FluorideHCID 120201061alpha,3beta-bis(tert-butyldimethylsilyloxy)-20(R)-{(E)-(4-ethyl-4-triethylsilyloxy-2-hexenyloxy)}pregna-5,7,16-triene

Produkt 1

HCID 229597931alpha,3beta-dihydroxy-20(R)-{(E)-(4-ethyl-4-hydroxy-2-hexenyloxy)}pregna-5,7,16-trieneAusbeute 42,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

By the same procedure as in Example 9, 1α,3β-bis(tert-butyldimethylsilyloxy)-20(R)-{(E)-(4-ethyl-4-triethylsilyloxy-2-hexenyloxy)}pregna-5,7,16-triene (60.3 mg, 0.0754 mmol), tetrahydrofuran (3 ml) and 1M tetra-n-butylammonium fluoride solution in tetrahydrofuran (2 ml) were reacted (heating under reflux for 5.5 hours) and worked up, and then the residue was purified by preparative thin layer chromatography (0.5 mm×1, dichloromethane:ethyl acetate:ethanol=20:80:1, developed once) to give the title compound as a pale yellow oil (14.5 mg, 42%).

Aufarbeitung

  1. temperature(heating under reflux for 5.5 hours)
  2. customthe residue was purified by preparative thin layer chromatography (0.5 mm×1, dichloromethane

Quellen und Nachweise

ORD-Eintrag
ord-6002ad98079246a4839c37186337696e
Quelldatensatz
uspto-grants-2001_12
Patentnummer
US06326503B1

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