Sodium Hydroxide → 2-Methoxyimino-2-(1,2,3-thiadiazol-4-yl)acetic acid

HRID 463917Notes

Reaction equation

HRID 463917 reaction equation
[OH-].[Na+].[CH3:3][O:4][N:5]=[C:6]([C:12]1[N:13]=[N:14][S:15][CH:16]=1)[C:7]([O:9]CC)=[O:8]>O.CO>[CH3:3][O:4][N:5]=[C:6]([C:12]1[N:13]=[N:14][S:15][CH:16]=1)[C:7]([OH:9])=[O:8]

Participants

5

Reactant 2

HCID 14798Sodium HydroxideHCID 53899707Ethyl 2-methoxyimino-2-(1,2,3-thiadiazol-4-yl)acetate

Product 1

HCID 543473402-Methoxyimino-2-(1,2,3-thiadiazol-4-yl)acetic acidYield 71.2%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

A solution of sodium hydroxide (0.47 g.) in water (10 ml.) was added to a solution of ethyl 2-methoxyimino-2-(1,2,3-thiadiazol-4-yl)acetate (anti isomer) (2.1 g.) in methanol (20 ml.) and the resulting mixture was stirred for 6 hours at ambient temperature. Methanol was removed from the reaction mixture and to the residue was added water. The resulting mixture was washed with ether, adjusted to pH 1 with 10% hydrochloric acid and extracted twice with ether (50 ml.). The extract was washed with a saturated aqueous solution of sodium chloride and dried over magnesium sulfate. The solvent was distilled off to give oil of 2-methoxyimino-2-(1,2,3-thiadiazol-4-yl)acetic acid (anti isomer) (1.3 g.).

Workup

  1. customMethanol was removed from the reaction mixture and to the residue
  2. additionwas added water
  3. washThe resulting mixture was washed with ether
  4. extractionextracted twice with ether (50 ml.)
  5. washThe extract was washed with a saturated aqueous solution of sodium chloride
  6. dry with materialdried over magnesium sulfate
  7. distillationThe solvent was distilled off

Sources & evidence

ORD record
ord-545972d1bb644a92b9cc60db4f920ce0
Source dataset
uspto-grants-1985_10
Patent number
US04544751

Reaction notes

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