文摘
A series of novel β-lactams was synthesized from different imines and a special ketene derived from N-endo-5-norbornene-2,3-dicarboxyloylglycine 1 via the [2 + 2] ketene imine cycloaddition. Then, β-lactams 3a–h were treated with 1-azido-4-nitrobenzene 4 to afford β-lactam-triazole hybrids 5a–h. Of the twenty-three β-lactams tested against chloroquine-resistant P. falciparum K14 strain, 3a and 3d showed IC50 < 20 µM, while 3j, 3m, 5a–5f exhibited IC50 < 50. These newly synthesized β-lactams were also tested against S. aureus, E. coli, P. aeruginosa, C. albicans and C. glabrata and showed no activity below 125 µg/mL. Keywords β-Lactam N-endo-5-norbornene-2,3-dicarboxyloylglycine Triazole hybrids P. falciparum