Synthesis and molecular structures of novel .alpha.-amino organoaluminum ester enolates. Key intermediates in the selective formation of trans-3-amino-2-azetidinones
作者:Fred H. Van der Steen、Guido P. M. Van Mier、Anthony L. Spek、Jan Kroon、Gerard Van Koten
DOI:10.1021/ja00015a031
日期:1991.7
Full-matrix least-squares refinement on F converged at R = 0.05 1 and R, = 0.043. The structures of enolates 3 and 3’ in solution as well as the reactions of these enolates with imines 4 is discussed. It is shown that both dimeric enolates 3 as well as monomeric adducts 3’ may act as the reactive intermediates in the one-pot synthesis of 3-amino-2-azetidinones 5 and 6, which is characterized by the reactions
Development of Membrane-Targeting Fluorescent 2-Phenyl-1<i>H</i>-phenanthro[9,10-<i>d</i>]imidazole-Antimicrobial Peptide Mimic Conjugates against Methicillin-Resistant <i>Staphylococcus aureus</i>
antibacterial effect against clinical methicillin-resistantStaphylococcusaureus (MRSA) isolates (MICs: 1–2 μg/mL) but also had the advantages of rapid bactericidal properties, low toxicity, good plasma stability, and not readily inducing bacterial resistance. Mechanistic studies indicated that IV15 has good membrane-targeting ability and can bind to phosphatidylglycerol and cardiolipin in bacterial membranes