Lithium hydroxide, monohydrate → 3-{[5-(azetidin-1-ylcarbonyl)pyrazin-2-yl]oxy}-5-({(1S)-2-[(difluoromethyl)oxy]-1-methylethyl}oxy)benzoic acid

HRID 1011825Notes

Reaction equation

HRID 1011825 reaction equation
O.[OH-].[Li+].[N:4]1([C:8]([C:10]2[N:11]=[CH:12][C:13]([O:16][C:17]3[CH:18]=[C:19]([CH:24]=[C:25]([O:27][C@@H:28]([CH3:34])[CH2:29][O:30][CH:31]([F:33])[F:32])[CH:26]=3)[C:20]([O:22]C)=[O:21])=[N:14][CH:15]=2)=[O:9])[CH2:7][CH2:6][CH2:5]1>O.C1COCC1>[N:4]1([C:8]([C:10]2[N:11]=[CH:12][C:13]([O:16][C:17]3[CH:18]=[C:19]([CH:24]=[C:25]([O:27][C@@H:28]([CH3:34])[CH2:29][O:30][CH:31]([F:32])[F:33])[CH:26]=3)[C:20]([OH:22])=[O:21])=[N:14][CH:15]=2)=[O:9])[CH2:5][CH2:6][CH2:7]1

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 53629696methyl 3-{[5-(azetidin-1-ylcarbonyl)pyrazin-2-yl]oxy}-5-({(1S)-2-[(difluoromethyl)oxy]-1-methylethyl}oxy)benzoate

Product 1

HCID 591271903-{[5-(azetidin-1-ylcarbonyl)pyrazin-2-yl]oxy}-5-({(1S)-2-[(difluoromethyl)oxy]-1-methylethyl}oxy)benzoic acidYield 81.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

Lithium hydroxide monohydrate (48 mg, 1.13 mmol) in water (5 mL) was added to a solution of methyl 3-{[5-(azetidin-1-ylcarbonyl)pyrazin-2-yl]oxy}-5-({(1S)-2-[(difluoromethyl)oxy]-1-methylethyl}oxy)benzoate (0.33 g, 0.75 mmol) in THF (10 mL) and stirred at RT for 20 hours. The THF was removed in vacuo and the aqueous layer washed with ethyl acetate (50 mL) to remove any impurities. The aqueous layer was acidified and extracted into ethyl acetate (2×50 mL), washed with brine, dried (MgSO4), filtered and the solvent removed in vacuo to give the desired compound as a white foam (0.26 g). m/z 424 (M+H)+

Workup

  1. customThe THF was removed in vacuo
  2. washthe aqueous layer washed with ethyl acetate (50 mL)
  3. customto remove any impurities
  4. extractionextracted into ethyl acetate (2×50 mL)
  5. washwashed with brine
  6. dry with materialdried (MgSO4)
  7. filtrationfiltered
  8. customthe solvent removed in vacuo

Sources & evidence

ORD record
ord-f4a583f267f14365abab5f601e97663f
Source dataset
uspto-grants-2011_07
Patent number
US07977328B2

Reaction notes

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