β-Lactams having a sulfonic acid substituent in the 1-position and one or two substituents as specified in the 4-position and an amine function in the 3-position and their use as antibiotics.
β-lactams having a sulfonic acid substituent in the 1-position and one or two substituents as specified in the 4-position and an amine function in the 3-position, are prepared by sulfonating a corresponding β-lactam having a hydrogen substituent in the 1-position and a protected amino substituent in the 1-position and removing said amino protecting group.