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Bromoform → (2S,4aS,6aR,7R,9R,10aS,10bR)-9-(Bromo)-2-(3-furanyl)-dodecahydro-6a,10b-dimethyl-4,10-dioxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester

HRID 12322
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 12322
[CH3:1][O:2][C:3]([C@@H:5]1[CH2:18][C@H:17](O)[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].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(Br)(Br)[Br:49]>C(Cl)Cl>[CH3:1][O:2][C:3]([C@@H:5]1[CH2:18][C@@H:17]([Br:49])[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]
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Komponenten

5

Edukt 3

HCID 5558Bromoform2×HCID 11776Triphenylphosphine2×HCID 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 68683634(2S,4aS,6aR,7R,9R,10aS,10bR)-9-(Bromo)-2-(3-furanyl)-dodecahydro-6a,10b-dimethyl-4,10-dioxo-2H-naphtho[2,1-c]pyran-7-carboxylic acid methyl ester
Ausbeute 59 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A mixture of salvinorin B (8a) (0.15 g, 0.38 mmol), triphenylphosphine (0.21 g, 0.80 mmol), and bromoform (0.15 g, 0.45 mmol) in CH2Cl2 (30 mL) was stirred at room temperature overnight. TLC indicated that starting material was still present after 16 h, thus additional triphenylphosphine (0.11 g, 0.42 mmol) and bromoform (0.07 g, 0.21 mmol) were added and the mixture was stirred for an additional 3 h. The solvent was removed under reduced pressure affording a crude solid. The oil was purified by column chromatography (eluent: 30% EtOAc/n-hexanes) to afford 0.10 g (59%) of 36 as a white solid, mp 170-173° C. (EtOAc/n-hexanes); 1H NMR (CDCl3): δ 1.15 (3H, s); 1.48 (3H, s); 1.60 (3H, m); 1.81 (1H, dd, J=2.7, 9.9); 1.95 (1H, dd, J=13.2, 26.1); 2.1 (2H, m); 2.27 (1H, s); 2.47 (1H, dd, J=4.8, 13.2); 2.66 (1H, m); 2.80 (1H, dd, J=3.3, 13.2); 3.70 (3H, s); 3.89 (2H, d, J=2.4); 4.45 (1H, m); 5.55 (1H, dd, J=4.8, 11.7); 6.38 (1H, dd, J=0.9, 1.5); 7.4 (2H, m).

Aufarbeitung

  1. waitwas still present after 16 h
  2. stirringthe mixture was stirred for an additional 3 h
  3. customThe solvent was removed under reduced pressure
  4. customaffording a crude solid
  5. customThe oil was purified by column chromatography (eluent: 30% EtOAc/n-hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-f9487c4143a64edc9e1870c4f003f434
Quelldatensatz
uspto-grants-2010_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07728001B2

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