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

HRID 909629ノート

反応式

HRID 909629 の反応式
[CH3:1][C@@H:2]1[C@H:6]([CH3:7])[O:5][C:4]([C:8]2[NH:12][C:11]([C:13]3[CH:14]=[C:15]([CH:27]=[C:28]([O:30][C@@H:31]([CH3:35])[CH2:32][O:33]C)[CH:29]=3)[O:16][C:17]3[CH:22]=[N:21][C:20]([S:23]([CH3:26])(=[O:25])=[O:24])=[CH:19][N:18]=3)=[CH:10][CH:9]=2)=[N:3]1.B(Br)(Br)Br.C(=O)([O-])O.[Na+]>C(Cl)Cl>[CH3:1][C@@H:2]1[C@H:6]([CH3:7])[O:5][C:4]([C:8]2[NH:12][C:11]([C:13]3[CH:29]=[C:28]([CH:27]=[C:15]([O:16][C:17]4[CH:22]=[N:21][C:20]([S:23]([CH3:26])(=[O:24])=[O:25])=[CH:19][N:18]=4)[CH:14]=3)[O:30][C@@H:31]([CH3:35])[CH2:32][OH:33])=[CH:10][CH:9]=2)=[N:3]1

参加物

5

反応物 3

HCID 25134Boron tribromideHCID 516892Sodium BicarbonateHCID 668909802-(3-{5-[(4R,5S)-4,5-Dimethyl-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}-5-{[(2S)-1-methoxypropan-2-yl]oxy}phenoxy)-5-(methylsulfonyl)pyrazine

生成物 1

HCID 44184354(2S)-2-(3-{5-[(4R,5S)-4,5-Dimethyl-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 79%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

2-(3-{5-[(4R,5S)-4,5-Dimethyl-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}-5-{[(2S)-1-methoxypropan-2-yl]oxy}phenoxy)-5-(methylsulfonyl)pyrazine (513 mg, 1.02 mmol) synthesized in Example (109d) was dissolved in methylene chloride (10 mL), and boron tribromide (1.0 mol/L methylene chloride solution, 1.50 mL, 1.50 mmol) was added dropwise at −78° C., followed by stirring at room temperature for 2 hours under nitrogen atmosphere. To this reaction solution, a saturated aqueous sodium hydrogencarbonate solution (20 mL) was added, and extraction was carried out with methylene chloride (20 mL). The organic layer was washed with saturated brine, 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 (390 mg, yield 79%) as a pale yellow solid.

後処理

  1. extractionextraction
  2. washThe organic layer was washed with saturated brine
  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-d95ddae907f94e499cbe8e3d0fb6b168
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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