title: Synthesis and in vitro activity of novel quaternary ammonium carbapenems: 2-pyridiniopropyl and 1-pyridinioethyl carbapenems.
abstract: The synthesis of new carbapenems having either a pyridiniopropyl group at the 2-position or a pyridinioethyl group at the 1-position is described, along with the preparation of their corresponding hydroxy and acetoxy analogs. The antibacterial activity, susceptibility to dehydropeptidase-I (DHP-I) enzyme and chemical stability of these new carbapenems are also reported. 2-Pyridiniopropyl-carbapenem 4 was found to possess excellent antibacterial activity. It was more stable chemically and less susceptible to the DHP-I enzyme than the thio analog 3. 1-Pyridinioethylcarbapenem 5 showed significantly reduced antibacterial activity as compared to 2-pyridiniopropylcarbapenem 4.
authors.affiliation: Antiinfective Chemistry Department, Bristol-Myers Squibb Company, Candiac, Quebec, Canada.
authors.forename: Y
authors.initials: Y
authors.lastname: Ueda
authors.forename: V
authors.initials: V
authors.lastname: Vinet
mesh_terms: D015780:Carbapenems / Q000138:chemical synthesis* / Q000494:pharmacology; D004355:Drug Stability; D008968:Molecular Conformation; D013329:Structure-Activity Relationship
chemical_list: D015780:Carbapenems