Chlorotrimethylsilane → (3S,4aR,4bS,6S,8R,8aR,10aR)-3-Furan-3-yl-4a,8a-dimethyl-1,5-dioxo-6-phenylcarbamoyloxy-dodecahydro-2-oxa-phenanthrene-8-carboxylic acid methyl ester

HRID 12319

Reaktionsgleichung

Reaktionsgleichung von HRID 12319
[CH3:1][O:2][C:3]([C@@H:5]1[CH2:18][C@H:17]([OH:19])[C:16](=[O:20])[C@H:15]2[C@@:6]1([CH3:28])[CH2:7][CH2:8][C@H:9]1[C@:14]2([CH3:21])[CH2:13][C@@H:12]([C:22]2[CH:26]=[CH:25][O:24][CH:23]=2)[O:11][C:10]1=[O:27])=[O:4].C[Si](Cl)(C)C.[C:34]1([N:40]=[C:41]=[O:42])[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1>C(Cl)Cl>[CH3:1][O:2][C:3]([C@@H:5]1[CH2:18][C@H:17]([O:19][C:41](=[O:42])[NH:40][C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[C:16](=[O:20])[C@H:15]2[C@@:6]1([CH3:28])[CH2:7][CH2:8][C@@H:9]1[C@:14]2([CH3:21])[CH2:13][C@@H:12]([C:22]2[CH:26]=[CH:25][O:24][CH:23]=2)[O:11][C:10]1=[O:27])=[O:4]

Komponenten

5

Edukt 3

HCID 6397ChlorotrimethylsilaneHCID 7672Phenyl isocyanateHCID 11395172(2S,4aS,6aR,7R,9S,10aS,10bR)-9-(hydroxy)-2-(3-furanyl)dodecahydro-6a,10b-dimethyl-4,10-dioxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester

Produkt 1

HCID 11191431(3S,4aR,4bS,6S,8R,8aR,10aR)-3-Furan-3-yl-4a,8a-dimethyl-1,5-dioxo-6-phenylcarbamoyloxy-dodecahydro-2-oxa-phenanthrene-8-carboxylic acid methyl esterAusbeute 14 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A solution of 8a (0.06 g, 0.14 mmol), trimethylsilyl chloride (0.01 mL, 0.08 mmol) and phenylisocyanate (0.1 mL, 0.92 mmol) in CH2Cl2 was stirred at room temperature for 5 days. The reaction mixture was then washed with saturated NaHCO3 (10 mL) and H2O (10 mL) and dried (Na2SO4). The solvent was removed under reduced pressure to give a crude oil. The oil was purified by column chromatography (eluent: ethyl acetate/n-hexanes) to afford 22 (0.01 g, 14%) as a clear oil: 1H NMR (CDCl3): δ 1.15 (s, 3H); 1.48 (s, 3H); 1.52-1.72 (m, 3H); 1.82 (dd, 1H, 2.7, 10.2 1H); 2.03-2.20 (m, 1H); 2.22 (s, 1H); 2.24-2.48 (m, 2H); 2.54 (dd, Ja=5.1, Jb=13.5, 1H); 2.80 (dd, Ja=3.6, Jb=13.2, 1H); 3.75 (s, 3H); 5.21 (dd, Ja=7.8, Jb=12.3, 1H); 5.54 (dd, J=11.7, 1H); 6.40 (m, 1H), 6.69 (br s, 1H); 6.87 (br s, 1H); 7.12 (m, 2H); 7.28-7.45 (m, 5H).

Aufarbeitung

  1. washThe reaction mixture was then washed with saturated NaHCO3 (10 mL) and H2O (10 mL)
  2. dry with materialdried (Na2SO4)
  3. customThe solvent was removed under reduced pressure
  4. customto give a crude oil
  5. customThe oil was purified by column chromatography (eluent: ethyl acetate/n-hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-9edfd93c7b884bb8a336fb912c356863
Quelldatensatz
uspto-grants-2010_06
Patentnummer
US07728001B2

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