Hydrochloric Acid → 3-[1-[4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-3-phenyl-1H-pyrazol-4-yl]propionic acid

HRID 350103Notes

Reaction equation

HRID 350103 reaction equation
[CH3:1][C:2]1[O:6][C:5]([C:7]2[S:8][CH:9]=[CH:10][CH:11]=2)=[N:4][C:3]=1[CH2:12][O:13][C:14]1[CH:37]=[CH:36][C:17]([CH2:18][N:19]2[CH:23]=[C:22]([CH2:24][CH2:25][C:26]([O:28]C)=[O:27])[C:21]([C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=3)=[N:20]2)=[CH:16][CH:15]=1.O.[OH-].[Li+].O1CCCC1.Cl>CO.O>[CH3:1][C:2]1[O:6][C:5]([C:7]2[S:8][CH:9]=[CH:10][CH:11]=2)=[N:4][C:3]=1[CH2:12][O:13][C:14]1[CH:37]=[CH:36][C:17]([CH2:18][N:19]2[CH:23]=[C:22]([CH2:24][CH2:25][C:26]([OH:28])=[O:27])[C:21]([C:30]3[CH:31]=[CH:32][CH:33]=[CH:34][CH:35]=3)=[N:20]2)=[CH:16][CH:15]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 8028TetrahydrofuranHCID 168937Lithium hydroxide, monohydrateHCID 69423000methyl 3-[1-[4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-3-phenyl-1H-pyrazol-4-yl]propionate

Product 1

HCID 694227073-[1-[4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-3-phenyl-1H-pyrazol-4-yl]propionic acidYield 95%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

A mixture of methyl 3-[1-[4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-3-phenyl-1H-pyrazol-4-yl]propionate (633 mg), lithium hydroxide monohydrate (155 mg), tetrahydrofuran (6 ml), water (4 ml) and methanol (4 ml) was stirred at room temperature for 2 hours, and 1N hydrochloric acid (3.7 ml) was added to the mixture, which was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated aqueous sodium chloride solution, dried (MgSO4), then concentrated. The colorless crystals obtained were collected by filtration to yield 3-[1-[4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-3-phenyl-1H-pyrazol-4-yl]propionic acid (581 mg, yield: 95%). This was recrystallized from ethyl acetate-hexane. Melting point: 159–160° C.

Workup

  1. extractionwas extracted with ethyl acetate
  2. washThe ethyl acetate layer was washed with saturated aqueous sodium chloride solution
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customThe colorless crystals obtained
  6. filtrationwere collected by filtration

Sources & evidence

ORD record
ord-546f1d3b0e9a48a8a8e8dc779ec2d815
Source dataset
uspto-grants-2007_02
Patent number
US07179823B1

Reaction notes

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