Boron tribromide → HCID 58065512, compound

HRID 909616Notes

Reaction equation

HRID 909616 reaction equation
[CH2:1]([C@@H:3]1[O:7][C:6]([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:5][CH2:4]1)[CH3:2].B(Br)(Br)Br.C(=O)([O-])O.[Na+]>C(Cl)Cl>[CH2:1]([C@@H:3]1[O:7][C:6]([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:25])=[O:24])=[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:5][CH2:4]1)[CH3:2]

Participants

5

Reactant 3

HCID 25134Boron tribromideHCID 516892Sodium BicarbonateHCID 666813092-(3-{5-[(5S)-5-Ethyl-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}-5-{[(2S)-1-methoxypropan-2-yl]oxy}phenoxy)-5-(methylsulfonyl)pyrazine

Product 1

HCID 58065512HCID 58065512, compoundYield 91.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

2-(3-{5-[(5S)-5-Ethyl-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}-5-{[(2S)-1-methoxypropan-2-yl]oxy}phenoxy)-5-(methylsulfonyl)pyrazine (860 mg, 1.72 mmol) synthesized in Example (1060 was dissolved in methylene chloride (20 mL), and boron tribromide (1.0 mol/L methylene chloride solution, 2.50 mL, 2.50 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=2%-4%) to afford the desired compound (764 mg, yield 91%) as a yellow solid.

Workup

  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=2%-4%)

Sources & evidence

ORD record
ord-41a63fe4d42b4503a57a389420dd5fd6
Source dataset
uspto-grants-2011_09
Patent number
US08017610B2

Reaction notes

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