Ethyl 2-methoxyimino-2-(2-aminothiazol-4-yl)acetate hydrobromide → 2-(2-Aminothiazole-4-yl)-2-methoxyiminoacetic acid

HRID 261693

Reaction equation

HRID 261693 reaction equation
Br.[CH3:2][O:3][N:4]=[C:5]([C:11]1[N:12]=[C:13]([NH2:16])[S:14][CH:15]=1)[C:6]([O:8]CC)=[O:7]>[OH-].[Na+].O>[CH3:2][O:3][N:4]=[C:5]([C:11]1[N:12]=[C:13]([NH2:16])[S:14][CH:15]=1)[C:6]([OH:8])=[O:7]

Participants

4

Reactant 1

HCID 73668749Ethyl 2-methoxyimino-2-(2-aminothiazol-4-yl)acetate hydrobromide

Product 1

HCID 1252162-(2-Aminothiazole-4-yl)-2-methoxyiminoacetic acidYield 79.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 14798Sodium HydroxideSolvent

Procedure

Ethyl 2-methoxyimino-2-(2-amino-1,3-thiazol-4-yl)acetate hydrobromide (anti isomer) (15.5 g.) was dissolved in a solution of sodium hydroxide (4.4 g.) in water (150 ml.) and the resulting solution was stirred for 1 hour at ambient temperature. An insoluble material was filtered off and the filtrate was adjusted to pH 5.0 to precipitate crystals. The crystals were collected by filtration and dried to give 2-methoxyimino-2-(2-amino-1,3-thiazol-4-yl)acetic acid (anti isomer) (8.0 g.).

Workup

  1. filtrationAn insoluble material was filtered off
  2. customto precipitate crystals
  3. filtrationThe crystals were collected by filtration
  4. customdried

Sources & evidence

ORD record
ord-162180bcda7e45399c4948162554dbeb
Source dataset
uspto-grants-1979_08
Patent number
US04166115

Linked notes

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