A monocyclic ring in their structure characterizes monobactams, a subclass of β-lactam antibiotics.
Many of these compounds have a bactericidal mechanism of action and acts as penicillin and
cephalosporins, interfering with bacterial cell wall biosynthesis. The synthesis of novel β-lactams is an
emerging area of organic synthesis research due to the problem of increasing bacterial resistance to
existing β -lactam antibiotics, and, in this way, new compounds have been presented with several
structural modifications, aiming to improve biological activities. Among the biological activities
studied, the most outstanding are antibacterial, antitubercular, anticholesterolemic, anticancer, antiinflammatory,
antiviral, and anti-enzymatic, among others. This review explores the vast number of
works related to monocyclic β-lactams, compounds of great importance in scientific research.