Methanesulfonic Acid → (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

HRID 1964695Notes

Reaction equation

HRID 1964695 reaction equation
O[CH2:2][C@H:3]([NH:7][C:8]([C:10]1[NH:11][C:12]([C:15]2[CH:20]=[C:19]([O:21][Si:22]([CH:29]([CH3:31])[CH3:30])([CH:26]([CH3:28])[CH3:27])[CH:23]([CH3:25])[CH3:24])[CH:18]=[C:17]([O:32][C@@H:33]([CH3:37])[CH2:34][O:35][CH3:36])[CH:16]=2)=[CH:13][CH:14]=1)=[O:9])[C@H:4]([OH:6])[CH3:5].CS(O)(=O)=O.C(N(CC)CC)C.[Cl-].[NH4+]>O1CCCC1>[CH3:36][O:35][CH2:34][C@@H:33]([O:32][C:17]1[CH:16]=[C:15]([C:12]2[NH:11][C:10]([C:8]3[O:9][CH2:2][C@@H:3]([C@H:4]([OH:6])[CH3:5])[N:7]=3)=[CH:14][CH:13]=2)[CH:20]=[C:19]([O:21][Si:22]([CH:29]([CH3:30])[CH3:31])([CH:26]([CH3:27])[CH3:28])[CH:23]([CH3:24])[CH3:25])[CH:18]=1)[CH3:37]

Participants

6

Reactant 4

HCID 6395Methanesulfonic AcidHCID 8471TriethylamineHCID 25517Ammonium ChlorideHCID 66681611N-[(2S,3R)-1,3-Dihydroxybutan-2-yl]-5-(3-{[(2S)-1-methoxypropan-2-yl]oxy}-5-[(tripropan-2-ylsilyl)oxy]phenyl)-1H-pyrrole-2-carboxamide

Product 1

HCID 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}ethanolYield 79.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

N-[(2S,3R)-1,3-Dihydroxybutan-2-yl]-5-(3-{[(2S)-1-methoxypropan-2-yl]oxy}-5-[(tripropan-2-ylsilyl)oxy]phenyl)-1H-pyrrole-2-carboxamide (1.70 g, 3.18 mmol) synthesized in Example (114a) was dissolved in tetrahydrofuran (20 mL), and anhydrous methanesulfonic acid (0.78 g, 4.48 mmol) and triethylamine (1.50 mL, 10.76 mmol) were added at 0° C., followed by stirring at the same temperature for 1.5 hours under nitrogen atmosphere, followed by stirring at 50° C. overnight. To the 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/methylene chloride=2%-4%) to afford the desired compound (1.30 g, yield 79%) as a white foam.

Workup

  1. stirringby stirring at 50° C. overnight
  2. extractionextraction
  3. washThe organic layer was washed with saturated brine
  4. dry with materialsubsequently dried over anhydrous magnesium 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=2%-4%)

Sources & evidence

ORD record
ord-c32a0e8d400f48f68f4d44636e152024
Source dataset
uspto-grants-2013_04
Patent number
US08415359B2

Reaction notes

Loading…