Hydrochloric Acid → 3-Ethoxy-1,2-oxazole-5-carboxylic acid

HRID 486161Notes

Reaction equation

HRID 486161 reaction equation
[CH2:1]([O:3][C:4]1[CH:8]=[C:7]([C:9]([O:11]C)=[O:10])[O:6][N:5]=1)[CH3:2].Cl>[OH-].[Na+]>[CH2:1]([O:3][C:4]1[CH:8]=[C:7]([C:9]([OH:11])=[O:10])[O:6][N:5]=1)[CH3:2]

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 15007417Methyl 3-ethoxy-5-isoxazolecarboxylate

Product 1

HCID 150074183-Ethoxy-1,2-oxazole-5-carboxylic acid

Reagents, catalysts & solvents 1

HCID 14798Sodium HydroxideSolvent

Procedure

A stirred solution of methyl 3-ethoxy-5-isoxazolecarboxylate, prepared according to Example 78, (3.00 g, 17.53 mmole) in 75 ml of 2N sodium hydroxide was stirred at room temperature for ten minutes, cooled in an icebath and acidified to pH 3 with concentrated hydrochloric acid. The precipitated solid was collected by filtration. The remaining desired product was isolated by saturating the aqueous filtrate with solid sodium chloride and extracting with ethyl acetate (3× 100 ml). A total of 2.46 g (89% yield) of title compound was obtained in this way. The sample was recrystallized from acetonitrile, m.p. 210°-13° C.

Workup

  1. temperaturecooled in an icebath
  2. filtrationThe precipitated solid was collected by filtration

Sources & evidence

ORD record
ord-a9b2d48ece244a95bc902d113192ed18
Source dataset
uspto-grants-1994_03
Patent number
US05290802

Reaction notes

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