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Dimethyl Sulfate → (4s,7r)-3-Methoxy-7,8,8-trimethyl-2-phenyl-4,5,6,7-tetrahydro-2h-4,7-methano-indazole

HRID 1437907
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Reaktionsgleichung

Reaktionsgleichung von HRID 1437907
S(OC)(O[CH3:5])(=O)=O.[C:8]1([N:14]2[C:22](=[O:23])[C:21]3[C@@H:20]4[C:24]([CH3:26])([CH3:25])[C@@:17]([CH3:27])([CH2:18][CH2:19]4)[C:16]=3[NH:15]2)[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1>[OH-].[Na+].O>[CH3:5][N:15]1[C:16]2[C@@:17]3([CH3:27])[C:24]([CH3:26])([CH3:25])[C@H:20]([CH2:19][CH2:18]3)[C:21]=2[C:22](=[O:23])[N:14]1[C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1.[CH3:5][O:23][C:22]1[N:14]([C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=2)[N:15]=[C:16]2[C:21]=1[C@@H:20]1[C:24]([CH3:26])([CH3:25])[C@@:17]2([CH3:27])[CH2:18][CH2:19]1
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Komponenten

6

Edukt 2

HCID 6497Dimethyl SulfateHCID 57941335(4s,7r)-2-Phenyl-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one2×

Produkt 2

HCID 57941522(4s,7r)-1,7,8,8-Tetramethyl-2-phenyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-oneAusbeute 20 %HCID 69022310(4s,7r)-3-Methoxy-7,8,8-trimethyl-2-phenyl-4,5,6,7-tetrahydro-2h-4,7-methano-indazoleAusbeute 23 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 14798Sodium HydroxideLösungsmittel

Versuchsvorschrift

Dimethyl sulfate (0.4 mL, 4.1 mmol) was added to (4S,7R)-2-phenyl-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Intermediate 6; 1.00 g, 3.7 mmol) in 1 M NaOH (10 mL). The mixture was stirred at room temperature overnight and then diluted with water and extracted three times with ethyl acetate. The combined organic layers were washed with water and brine, dried (magnesium sulfate), filtered, evaporated, and purified using an Analogix Intelliflash 280 system (Analogix, Inc., Burlington, Wis.) with an RS-12 column, eluting with 0-16% ethyl acetate/hexanes to give (4S,7R)-1,7,8,8-tetramethyl-2-phenyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (213 mg, 20%) as a white solid, (4S,7R)-3-methoxy-7,8,8-trimethyl-2-phenyl-4,5,6,7-tetrahydro-2H-4,7-methano-indazole (243 mg, 23%) as a yellow solid and unreacted starting material (243 mg, 24%).

Aufarbeitung

  1. extractionextracted three times with ethyl acetate
  2. washThe combined organic layers were washed with water and brine
  3. dry with materialdried (magnesium sulfate)
  4. filtrationfiltered
  5. customevaporated
  6. custompurified
  7. washeluting with 0-16% ethyl acetate/hexanes

Quellen und Nachweise

ORD-Eintrag
ord-89ddf294e8f544fb9e677e8f7d58e370
Quelldatensatz
uspto-grants-2009_11
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07622492B2

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