Formaldehyde → 17beta-Hydroxy-17alpha-methyl-6-methyleneandrosta-4,15-diene-3-one

HRID 2254629Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2254629
[OH:1][C@@:2]1([CH3:22])[CH:7]=[CH:6][C@H:5]2[C@H:8]3[C@H:18]([CH2:19][CH2:20][C@:3]12[CH3:4])[C@:16]1([CH3:17])[C:11](=[CH:12][C:13](=[O:21])[CH2:14][CH2:15]1)[CH2:10][CH2:9]3.C=O.F[C:26](F)(F)C([O-])=O.C[NH2+]C1C=CC=CC=1>O1CCCC1.C(OCC)(=O)C>[OH:1][C@@:2]1([CH3:22])[CH:7]=[CH:6][C@H:5]2[C@H:8]3[C@H:18]([CH2:19][CH2:20][C@:3]12[CH3:4])[C@:16]1([CH3:17])[C:11](=[CH:12][C:13](=[O:21])[CH2:14][CH2:15]1)[C:10](=[CH2:26])[CH2:9]3

Komponenten

6

Edukt 3

HCID 712FormaldehydeHCID 2724109N-Methylanilinium trifluoroacetateHCID 1567913617beta-Hydroxy-17alpha-methylandrosta-4,15-dien-3-one

Produkt 1

HCID 1567914917beta-Hydroxy-17alpha-methyl-6-methyleneandrosta-4,15-diene-3-oneAusbeute 43,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028TetrahydrofuranLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

500 mg of 17β-hydroxy-17α-methylandrosta-4,15-diene-3-one in 8.3 ml of tetrahydrofuran is stirred at 60° C. under argon with 348 mg of paraformaldehyde and 2.2 g of N-methylanilinium trifluoroacetate. After 3.5 hours, the mixture is diluted with ethyl acetate, washed with water, dried over sodium sulfate, and concentrated under vacuum. After the crude product has been chromatographed on silica gel with a pentane-diethyl ether gradient, 226 mg of 17β-hydroxy-17α-methyl-6-methyleneandrosta-4,15-diene-3-one is obtained, mp 162° C. (from isopropyl ether).

Aufarbeitung

  1. washwashed with water
  2. dry with materialdried over sodium sulfate
  3. concentrationconcentrated under vacuum
  4. customAfter the crude product has been chromatographed on silica gel with a pentane-diethyl ether gradient

Quellen und Nachweise

ORD-Eintrag
ord-fe0e53d39c1c416fb5965a229101d2f4
Quelldatensatz
uspto-grants-1993_08
Patentnummer
US05236912

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