Journal of Medicinal Chemistry p. 4244 - 4256 (1995)
Update date:2022-08-03
Topics:
Altamura, Maria
Perrotta, Enzo
Sbraci, Piero
Pestellini, Vittorio
Arcamone, Federico
et al.
A new series of 6-(hydroxyethyl)penems 2-substituted with amino acid-related side chains was synthesized.The nature of the amino acyl derivative proved to be crucial both from a synthetic point of view, as β-lactam ring opening can compete with C-2 nucleophilic substitution, and for antibacterial activity.Primary amino acid amides emerged as the most suitable side chains for enhancing permeability through a Gram-negative outer membrane.In vitro activity of the new 2-<(aminoamido)methyl>penems 3a-u was influenced by the nature and position of the amide moiety, the ring size for cyclic amides, and the configuration of the amino acid.Compounds bearing amides derived from small N-methyl amino acids (such as 3a) or from cyclic amino acids (such as prolinamide 3p and 4-hydroxyprolinamide 3r) showed broad spectrum in vitro activity against both Gram-positive and Gram-negative microorganisms.
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