Boron tribromide → (2S)-2-[3-(5-{(4S)-4-[(1R)-1-Hydroxyethyl]-4,5-dihydro-1,3-oxazol-2-yl}-1H-pyrrol-2-yl)-5-{[5-(methylsulfonyl)pyrazin-2-yl]oxy}phenoxy]propan-1-ol

HRID 1964698Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1964698
C[O:2][CH2:3][C@@H:4]([O:6][C:7]1[CH:8]=[C:9]([C:24]2[NH:28][C:27]([C:29]3[O:30][CH2:31][C@@H:32]([CH:34]([OH:36])[CH3:35])[N:33]=3)=[CH:26][CH:25]=2)[CH:10]=[C:11]([O:13][C:14]2[CH:19]=[N:18][C:17]([S:20]([CH3:23])(=[O:22])=[O:21])=[CH:16][N:15]=2)[CH:12]=1)[CH3:5].B(Br)(Br)Br.C(=O)([O-])O.[Na+]>C(Cl)Cl>[OH:36][C@@H:34]([C@@H:32]1[CH2:31][O:30][C:29]([C:27]2[NH:28][C:24]([C:9]3[CH:8]=[C:7]([CH:12]=[C:11]([O:13][C:14]4[CH:19]=[N:18][C:17]([S:20]([CH3:23])(=[O:22])=[O:21])=[CH:16][N:15]=4)[CH:10]=3)[O:6][C@@H:4]([CH3:5])[CH2:3][OH:2])=[CH:25][CH:26]=2)=[N:33]1)[CH3:35]

Komponenten

5

Edukt 3

HCID 25134Boron tribromideHCID 516892Sodium BicarbonateHCID 86761804[(4S)-2-(5-(3-{[(2S)-1-Methoxypropan-2-yl]oxy}-5-{[5-(methylsulfonyl)pyrazin-2-yl]oxy}phenyl)-1H-pyrrol-2-yl]-4,5-dihydro-1,3-oxazol-4-yl}ethanol

Produkt 1

HCID 58065463(2S)-2-[3-(5-{(4S)-4-[(1R)-1-Hydroxyethyl]-4,5-dihydro-1,3-oxazol-2-yl}-1H-pyrrol-2-yl)-5-{[5-(methylsulfonyl)pyrazin-2-yl]oxy}phenoxy]propan-1-olAusbeute 71 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

(1R)-1-{[(4S)-2-(5-(3-{[(2S)-1-Methoxypropan-2-yl]oxy}-5-{[5-(methylsulfonyl)pyrazin-2-yl]oxy}phenyl)-1H-pyrrol-2-yl]-4,5-dihydro-1,3-oxazol-4-yl}ethanol (213 mg, 0.412 mmol) synthesized in Example (114d) was dissolved in methylene chloride (5.0 mL), and boron tribromide (1.0 mol/L methylene chloride solution, 0.80 mL, 0.80 mmol) was added dropwise at −78° C., followed by stirring at room temperature for 1.5 hours under nitrogen atmosphere. To this reaction solution, a saturated aqueous sodium hydrogencarbonate solution (10 mL) was added, and extraction was carried out with methylene chloride (20 mL). The organic layer was washed with 1N aqueous sodium hydroxide solution (10 mL), and subsequently dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: methanol/methylene chloride=4%-5%) to afford the desired compound (147 mg, yield 71%) as a white solid.

Aufarbeitung

  1. extractionextraction
  2. washThe organic layer was washed with 1N aqueous sodium hydroxide solution (10 mL)
  3. dry with materialsubsequently dried over anhydrous magnesium sulfate
  4. distillationThe solvent was distilled off under reduced pressure
  5. customthe resulting residue was purified
  6. washsilica gel column chromatography (elution solvent: methanol/methylene chloride=4%-5%)

Quellen und Nachweise

ORD-Eintrag
ord-bc121cb8c3474a8baa44ca08937a8268
Quelldatensatz
uspto-grants-2013_04
Patentnummer
US08415359B2

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