1467-1471A
new synthetic method of some β-lactamic antibiotics containing an asparagic
acid residue is described which is based on the acylation of the
6-aminopenicillanic acid (6-APA) and of the 7-aminodesacetoxycephalosporanic
acid (7-ADCA), respectively, by acid dichlorides of the N-(o,m,p)-nitrobenzoyl
asparagic acids at low temperatures in nonaqueous medium. The structure of the
newly synthesized compounds has been elucidated by means of elemental analysis
and spectral dam (IR, UV,NMR) and their antibacterial activity has been
evaluated