Acetic Anhydride → HCID 86703444, Verbindung

HRID 245597Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 245597
[Si:1]([O:8][C@H:9]1[C@H:22](/[CH:23]=[CH:24]/[C@@H:25]([O:31][Si:32]([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33])[CH2:26][CH2:27][CH2:28][CH2:29][CH3:30])[C@H:12]2[CH2:13][C:14]3[CH:15]=[CH:16][CH:17]=[C:18]([OH:21])[C:19]=3[CH2:20][C@H:11]2[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[C:39](OC(=O)C)(=[O:41])[CH3:40]>C1(C)C=CC=CC=1.CN(C1C=CN=CC=1)C.C(=O)(O)[O-].[Na+]>[C:39]([O:21][C:18]1[CH:17]=[CH:16][CH:15]=[C:14]2[C:19]=1[CH2:20][C@H:11]1[CH2:10][C@@H:9]([O:8][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])[C@H:22](/[CH:23]=[CH:24]/[C@@H:25]([O:31][Si:32]([C:35]([CH3:37])([CH3:36])[CH3:38])([CH3:34])[CH3:33])[CH2:26][CH2:27][CH2:28][CH2:29][CH3:30])[C@H:12]1[CH2:13]2)(=[O:41])[CH3:40]

Komponenten

6

Edukt 2

HCID 7918Acetic AnhydrideHCID 86677387HCID 86677387, Verbindung

Produkt 1

HCID 86703444HCID 86703444, VerbindungAusbeute 84,1 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 142844-(Dimethylamino)pyridineKatalysatorHCID 1140TolueneLösungsmittelHCID 516892Sodium BicarbonateLösungsmittel

Versuchsvorschrift

(1R,2R,3aS,9aS)-2,3,3a,4,9,9a-hexahydro-2-(tert-butyldimethylsilyoxy)-1-((S,E)-3-(tert-butyldimethylsilyoxy)oct-1-enyl)-1H-cyclopenta[b]naphthalen-5-ol (0.5 g, 0.89 mmol) in toluene (5 ml) was treated with acetic anhydride (0.1 ml, 1.07 mmol) and DMAP (1.1 mg, 0.09 mmol) at room temperature for 30 minutes. The reaction was diluted with saturated sodium bicarbonate aqueous (10 ml) and extracted with ethyl acetate (10 ml). The reaction mixture was phase separated and the aqueous layer was extracted with ethyl acetate. The organic layers were combined and dried over anhydrous magnesium sulfate. The solid was filtered off. The solvent was evaporated off under vacuum. The crude product was purified by chromatography on silica gel using a mixture of hexane and ethyl acetate as a gradient eluent. 0.45 g (1R,2R,3aS,9aS)-2,3,3a,4,9,9a-hexahydro-2-(tert-butyldimethylsilyoxy)-1-((S,E)-3-(tert-butyldimethylsilyoxy)oct-1-enyl)-1H-cyclopenta[b]naphthalen-5-yl acetate was obtained. The product was then dissolved in tetrahydrofuran (0.9 ml), and treated with acetic acid (2.7 ml) and distilled water (0.9 ml) overnight at room temperature. The reaction was then diluted with saturated sodium bicarbonate aqueous (12 ml) and extracted with ethyl acetate (15 ml). The reaction mixture was phase separated and the aqueous layer was extracted with ethyl acetate. The organic layers were combined and dried over anhydrous magnesium sulfate. The solid was filtered off. The solvent was evaporated off under vacuum. The crude product was purified by chromatography on silica gel using a mixture of hexane and ethyl acetate as a gradient eluent. The titled compound was obtained in a crystalline form. Melting range was 54˜65° C. Yield: 65%.

Aufarbeitung

  1. extractionextracted with ethyl acetate (10 ml)
  2. customseparated
  3. extractionthe aqueous layer was extracted with ethyl acetate
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationThe solid was filtered off
  6. customThe solvent was evaporated off under vacuum
  7. customThe crude product was purified by chromatography on silica gel using
  8. additiona mixture of hexane and ethyl acetate as a gradient eluent

Quellen und Nachweise

ORD-Eintrag
ord-57d5be37235448198c12ccdc41fc011e
Quelldatensatz
uspto-grants-2014_02
Patentnummer
US08658837B2

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