126765-10-4Relevant academic research and scientific papers
2-Substituted Penems with Amino Acid-Related Side Chains: Synthesis and Antibacterial Activity of a New Series of β-Lactam Antibiotics
Altamura, Maria,Perrotta, Enzo,Sbraci, Piero,Pestellini, Vittorio,Arcamone, Federico,et al.
, p. 4244 - 4256 (2007/10/03)
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-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.
Enhanced Cyclization of N-Benzyloxycarbonyl-N-substituted Dipeptide Methyl Esters with Ammonia
Kawashiro, Katsuhiro,Nishiguchi, Kazuhisa,Kurosaka, Ikuo
, p. 2404 - 2406 (2007/10/02)
Cyclization of N,N'- dimethyl ester to the hydantoin derivative took place easily under mild ammonolysis conditions.Replacement of Z by p-methoxy-benzyloxycarbonyl also led to the cyclizatio
