Used as a key intermediate in the synthesis of third-generation cephalosporin antibiotics, particularly in the production of ceftriaxone and similar beta-lactam antibiotics. Its structure allows for efficient coupling with other antibiotic moieties, enhancing antimicrobial activity and stability against beta-lactamase enzymes. Commonly employed in pharmaceutical manufacturing to introduce the aminothiazole oxime side chain, which improves penetration into bacterial cells and broadens the spectrum of activity against Gram-negative bacteria.