(Z)-ethyl 2-(2-aminothiazol-4-yl)-2-(hydroxyimino)acetate

It appears as a yellow to light brown crystalline powder, sparingly soluble in water but soluble in organic solvents such as ethanol, dichloromethane, and acetonitrile. (Z)-Ethyl 2-(2-aminothiazol-4-yl)-2-(hydroxyimino)acetate is a β-lactam side-chain intermediate employed to synthesize cephalosporin antibiotics, particularly third- and fourth-generation derivatives.

API Name Cephalosporin g
CAS No 64485-82-1
Molecular Formula C7H9N3O3S
Molecular Weight 215.23 g/mol
Synonyms ethyl (2E)-2-(2-amino-1,3-thiazol-4-yl)-2-hydroxyiminoacetate

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