Pyridine → 7-Methyl-14,15-methyleneestr-4-en-3-one

HRID 49414Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 49414
OC[C@@H:3]1[CH2:8][C@H:7]2[CH2:9][C@@:6]32[C@H:10]2[C@H:19]([CH2:20][CH2:21][C@:4]13[CH3:5])[C@@H:18]1[C:13](=[CH:14][C:15](=[O:22])[CH2:16][CH2:17]1)[CH2:12][C@H:11]2[CH3:23].N1C=CC=CC=1.C(OC(=O)C)(=O)C>O1CCCC1>[CH3:23][CH:11]1[CH2:12][C:13]2[C@H:18]([CH2:17][CH2:16][C:15](=[O:22])[CH:14]=2)[C@@H:19]2[C@@H:10]1[C@:6]13[CH2:9][CH:7]1[CH2:8][CH2:3][C@:4]3([CH2:21][CH2:20]2)[CH3:5]

Komponenten

5

Edukt 3

HCID 1049PyridineHCID 7918Acetic AnhydrideHCID 9796915(7alpha,14beta,15beta,17alpha)-17-(Hydroxymethyl)-7-methyl-14,15-methyleneestr-4-en-3-one

Produkt 1

HCID 701471477-Methyl-14,15-methyleneestr-4-en-3-oneAusbeute 121,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

A solution of (7α,14β,15β,17α)-17-(hydroxymethyl)-7-methyl-14,15-methyleneestr-4-en-3-one (Example 1, 0.20 g) in a mixture of dry pyridine (1.76 ml) and dry tetrahydrofuran (8.8 ml) was treated with acetic anhydride (1.06 ml). The mixture was stirred at room temperature overnight and then quenched with water. After 1 h stirring the product was extracted into ethyl acetate. The combined organic phases were washed with brine, dried over sodium sulfate, and concentrated under reduced pressure to give (7α,14β,15β,17α)17-[(acetyloxy)methyl)]-7-methyl-14,15-methyleneestr-4-en-3-one (0.22 g). 1H NMR (CDCl3) δ5.80 (t, 1H, J=2.8 Hz), 4.05 (dd, part A of AB system, 1H, J=11.0 and 6.3 Hz), 3.95 (dd, part B of AB system, 1H, J=11.0 and 7.1 Hz), 2.03 (s, 3H), 1.08 (s, 3H),. 0.62 (d, 3H, J=7.1 Hz), 0.48 (dd, 1H, J=8.3 and 5.1 Hz), 0.27 (dd, 1H, J=5.1 and 3.5 Hz).

Aufarbeitung

  1. customquenched with water
  2. stirringAfter 1 h stirring the product
  3. extractionwas extracted into ethyl acetate
  4. washThe combined organic phases were washed with brine
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-6067c95a42754a5ab37fe2b3f10db854
Quelldatensatz
uspto-grants-2004_03
Patentnummer
US06706700B2

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