Boron tribromide → HCID 135977435, compound

HRID 909567Notes

Reaction equation

HRID 909567 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:30]([CH3:33])=[N:31][N:32]=3)=[CH:26][CH:27]=2)[CH:22]=1)[O:9][C:10]1[CH:11]=[CH:12][C:13]([S:16]([CH3:19])(=[O:18])=[O:17])=[N:14][CH:15]=1.B(Br)(Br)Br.[Cl-].[NH4+]>C(Cl)Cl>[CH3:33][C:30]1[O:29][C:28]([C:25]2[NH:24][C:23]([C:21]3[CH:22]=[C:6]([CH:7]=[C:8]([O:9][C:10]4[CH:15]=[N:14][C:13]([S:16]([CH3:19])(=[O:17])=[O:18])=[CH:12][CH:11]=4)[CH:20]=3)[O:5][C@@H:4]([CH3:34])[CH2:3][OH:2])=[CH:27][CH:26]=2)=[N:32][N:31]=1

Participants

5

Reactant 3

HCID 25134Boron tribromideHCID 25517Ammonium ChlorideHCID 135977436HCID 135977436, compound

Product 1

HCID 135977435HCID 135977435, compoundYield 61.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

5-{3-[(1S)-2-Methoxy-1-methylethoxy]-5-[5-(5-methyl-1,3,4-oxadiazol-2-yl)-1H-pyrrol-2-yl]phenoxy}-2-(methylsulfonyl)pyridine (320 mg, 0.660 mmol) synthesized in Example 80 was dissolved in methylene chloride (10 mL), and boron tribromide (1.0 mol/L methylene chloride solution, 1.00 mL, 1.00 mmol) was added dropwise at −78° C., and stirring was carried out at room temperature for 1 hour under nitrogen atmosphere. To this reaction solution, a saturated aqueous ammonium chloride 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=1%-3%) to afford the desired compound (190 mg, yield 61%) 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=1%-3%)

Sources & evidence

ORD record
ord-2ad78234c3b04c109a504c7266994f5c
Source dataset
uspto-grants-2011_09
Patent number
US08017610B2

Reaction notes

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