Hydrochloric Acid → 3-{[3-methoxy-4-(5-methyl-2-phenyl-1,3-oxazol-4-ylmethoxy)benzyl]oxy}-1-phenyl-1H-pyrazole-4-carboxylic acid

HRID 2221957Notes

Reaction equation

HRID 2221957 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:24]=[CH:25][C:26]=1[O:27][CH2:28][C:29]1[N:30]=[C:31]([C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)[O:32][C:33]=1[CH3:34])[CH2:6][O:7][C:8]1[C:12]([C:13]([O:15]CC)=[O:14])=[CH:11][N:10]([C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[N:9]=1.[OH-].[Na+].O1CCCC1.Cl>C(O)C>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:24]=[CH:25][C:26]=1[O:27][CH2:28][C:29]1[N:30]=[C:31]([C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)[O:32][C:33]=1[CH3:34])[CH2:6][O:7][C:8]1[C:12]([C:13]([OH:15])=[O:14])=[CH:11][N:10]([C:18]2[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=2)[N:9]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 23076376ethyl 3-{[3-methoxy-4-(5-methyl-2-phenyl-1,3-oxazol-4-ylmethoxy)benzyl]oxy}-1-phenyl-1H-pyrazole-4-carboxylate

Product 1

HCID 692155703-{[3-methoxy-4-(5-methyl-2-phenyl-1,3-oxazol-4-ylmethoxy)benzyl]oxy}-1-phenyl-1H-pyrazole-4-carboxylic acidYield 92.5%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of ethyl 3-{[3-methoxy-4-(5-methyl-2-phenyl-1,3-oxazol-4-ylmethoxy)benzyl]oxy}-1-phenyl-1H-pyrazole-4-carboxylate (3.00 g), 1N aqueous sodium hydroxide solution (10 mL), tetrahydrofuran (30 mL) and ethanol (30 mL) was stirred at 60° C. for 5 hrs. 1N Hydrochloric acid (10 mL) was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated. The obtained colorless crystals were collected by filtration to give 3-{[3-methoxy-4-(5-methyl-2-phenyl-1,3-oxazol-4-ylmethoxy)benzyl]oxy}-1-phenyl-1H-pyrazole-4-carboxylic acid (2.63 g, yield 92%). The crystals were recrystallized from acetone-hexane. melting point: 209-210° C.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe ethyl acetate layer was washed with saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated
  5. filtrationThe obtained colorless crystals were collected by filtration

Sources & evidence

ORD record
ord-6d900ef0975d41d294a509c0d6f99cf9
Source dataset
uspto-grants-2008_05
Patent number
US07368578B2

Reaction notes

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