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 909642ノート

反応式

HRID 909642 の反応式
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]([C@H: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]

参加物

5

反応物 3

HCID 25134Boron tribromideHCID 516892Sodium BicarbonateHCID 51041151(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

生成物 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-ol収率 71%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

(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.

後処理

  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%)

出典と根拠

ORDレコード
ord-d2ca88fbaafa4e1a9078f774bcc56fcd
出典データセット
uspto-grants-2011_09
特許番号
US08017610B2

反応ノート

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