Ammonium Chloride → 3-(5-{(4S)-4-[(1R)-1-Hydroxyethyl]-4,5-dihydro-1,3-oxazol-2-yl}-1H-pyrrol-2-yl)-5-{[(2S)-1-methoxypropan-2-yl]oxy}phenol

HRID 909640Notes

Reaction equation

HRID 909640 reaction equation
[CH3:1][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][Si](C(C)C)(C(C)C)C(C)C)[CH:12]=1)[CH3:5].[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[Cl-].[NH4+]>O1CCCC1>[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:10]=[C:11]([OH:13])[CH:12]=[C:7]([O:6][C@@H:4]([CH3:5])[CH2:3][O:2][CH3:1])[CH:8]=3)=[CH:25][CH:26]=2)=[N:33]1)[CH3:35]

Participants

5

Reactant 3

HCID 25517Ammonium ChlorideHCID 2724141Tetrabutylammonium FluorideHCID 66683120(1R)-1-{(4S)-2-[5-(3-{[(2S)-1-Methoxypropan-2-yl]oxy}-5-[(tripropan-2-ylsilyl)oxy]phenyl)-1H-pyrrol-2-yl]-4,5-dihydro-1,3-oxazol-4-yl}ethanol

Product 1

HCID 666818293-(5-{(4S)-4-[(1R)-1-Hydroxyethyl]-4,5-dihydro-1,3-oxazol-2-yl}-1H-pyrrol-2-yl)-5-{[(2S)-1-methoxypropan-2-yl]oxy}phenolYield 85%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

(1R)-1-{(4S)-2-[5-(3-{[(2S)-1-Methoxypropan-2-yl]oxy}-5-[(tripropan-2-ylsilyl)oxy]phenyl)-1H-pyrrol-2-yl]-4,5-dihydro-1,3-oxazol-4-yl}ethanol (1.30 g, 2.52 mmol) synthesized in Example (114b) was dissolved in tetrahydrofuran (15 mL), and tetrabutylammonium fluoride (1.0 mol/L tetrahydrofuran solution, 4.00 mL, 4.00 mmol) was added at room temperature, followed by stirring at room temperature for 1 hour under nitrogen atmosphere. To this reaction solution, a saturated aqueous ammonium chloride solution (50 mL) was added, and extraction was carried out with methylene chloride (50 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/ethyl acetate=8%-12%) to afford the desired compound (766 mg, yield 85%) as a white foam.

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/ethyl acetate=8%-12%)

Sources & evidence

ORD record
ord-9287d1333a9f457fb83b3dd878a08af9
Source dataset
uspto-grants-2011_09
Patent number
US08017610B2

Reaction notes

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