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

HRID 2221728Notes

Reaction equation

HRID 2221728 reaction equation
[CH2:1]([N:8]1[CH:12]=[C:11]([C:13]([O:15]CC)=[O:14])[C:10]([O:18][CH2:19][C:20]2[CH:25]=[CH:24][C:23]([O:26][CH2:27][C:28]3[N:29]=[C:30]([C:34]4[O:35][CH:36]=[CH:37][CH:38]=4)[O:31][C:32]=3[CH3:33])=[C:22]([O:39][CH3:40])[CH:21]=2)=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.O1CCCC1.[OH-].[Na+].Cl>O.C(O)C>[CH2:1]([N:8]1[CH:12]=[C:11]([C:13]([OH:15])=[O:14])[C:10]([O:18][CH2:19][C:20]2[CH:25]=[CH:24][C:23]([O:26][CH2:27][C:28]3[N:29]=[C:30]([C:34]4[O:35][CH:36]=[CH:37][CH:38]=4)[O:31][C:32]=3[CH3:33])=[C:22]([O:39][CH3:40])[CH:21]=2)=[N:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 69215985ethyl 1-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazole-4-carboxylate

Product 1

HCID 692183501-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazole-4-carboxylic acidYield 84.4%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Procedure

To a mixture of ethyl 1-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazole-4-carboxylate (0.70 g), tetrahydrofuran (5 mL) and ethanol (5 mL) was added 1N aqueous sodium hydroxide solution (5 mL) and the mixture was heated under reflux for 2 hrs. 1N Hydrochloric acid (5 mL) and water were added to the reaction mixture and the precipitated crystals were collected by filtration to give 1-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazole-4-carboxylic acid as crystals (0.56 g, yield 84%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 167-168° C.

Workup

  1. temperaturethe mixture was heated
  2. temperatureunder reflux for 2 hrs
  3. filtrationthe precipitated crystals were collected by filtration

Sources & evidence

ORD record
ord-699cbf6ad8874f978489273bb317e82e
Source dataset
uspto-grants-2008_05
Patent number
US07368578B2

Reaction notes

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