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Boron tribromide → 5-(3-[(1S)-2-Hydroxy-1-methylethoxy]-5-{5-[(5S)-5-methyl-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}phenoxy)-N-methylpyridine-2-carboxamide

HRID 1964720
Notes
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Reaction equation

HRID 1964720 reaction equation
C[O:2][CH2:3][C@H:4]([CH3:34])[O:5][C:6]1[CH:7]=[C:8]([CH:20]=[C:21]([C:23]2[NH:24][C:25]([C:28]3[O:29][C@@H:30]([CH3:33])[CH2:31][N:32]=3)=[CH:26][CH:27]=2)[CH:22]=1)[O:9][C:10]1[CH:11]=[CH:12][C:13]([C:16]([NH:18][CH3:19])=[O:17])=[N:14][CH:15]=1.B(Br)(Br)Br.C(=O)([O-])O.[Na+]>C(Cl)Cl>[OH:2][CH2:3][C@H:4]([CH3:34])[O:5][C:6]1[CH:7]=[C:8]([CH:20]=[C:21]([C:23]2[NH:24][C:25]([C:28]3[O:29][C@@H:30]([CH3:33])[CH2:31][N:32]=3)=[CH:26][CH:27]=2)[CH:22]=1)[O:9][C:10]1[CH:11]=[CH:12][C:13]([C:16]([NH:18][CH3:19])=[O:17])=[N:14][CH:15]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 25134Boron tribromideHCID 516892Sodium BicarbonateHCID 666809955-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{5-[(5S)-5-methyl-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}phenoxy)-N-methylpyridine-2-carboxamide

Product 1

HCID 666825015-(3-[(1S)-2-Hydroxy-1-methylethoxy]-5-{5-[(5S)-5-methyl-4,5-dihydro-1,3-oxazol-2-yl]-1H-pyrrol-2-yl}phenoxy)-N-methylpyridine-2-carboxamideYield 69%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

5-(3-[(1S)-2-Methoxy-1-methylethoxy]-5-{5-[(5S)-5-methyl-4,5-dihydro-1,3-oxazol-2-yl]-1,1-pyrrol-2-yl}phenoxy)-N-methylpyridine-2-carboxamide (176 mg, 0.38 mmol) synthesized in Example (123b) was dissolved in methylene chloride (5 mL), and boron tribromide (1.0 mol/L methylene chloride solution, 0.50 mL, 0.50 mmol) was added at −78° C. Subsequently, the temperature was brought back to room temperature, followed by stirring for 1 hour. To the reaction solution, a saturated aqueous sodium hydrogencarbonate solution was added, and extraction was carried out with methylene chloride. The organic layer was washed with saturated brine, and subsequently dried over sodium 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=0%-5%) to afford the desired compound (118 mg, yield 69%) as a white solid.

Workup

  1. customwas brought back to room temperature
  2. extractionextraction
  3. washThe organic layer was washed with saturated brine
  4. dry with materialsubsequently dried over sodium sulfate
  5. distillationThe solvent was distilled off under reduced pressure
  6. customthe resulting residue was purified
  7. washsilica gel column chromatography (elution solvent: methanol/methylene chloride=0%-5%)

Sources & evidence

ORD record
ord-93e0d41cc28740429cdf88a6eb1dbe95
Source dataset
uspto-grants-2013_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08415359B2

Reaction notes

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