Synthetic studies on novel benzimidazolopeptides with antimicrobial, cytotoxic and anthelmintic potential
作者:Rajiv Dahiya、Devender Pathak
DOI:10.1016/j.ejmech.2006.11.015
日期:2007.6
presence of cupric chloride. The coupling of compounds 5-8 with different amino acid ester hydrochlorides/dipeptide/tripeptide/tetrapeptide methylesters afforded novel benzimidazolopeptide derivatives 5a-f, 6a-h, 7a-g and 8a-g. The structures of all newly synthesized compounds were established on the basis of analytical, IR, (1)H NMR, (13)C NMR and mass spectral data. Selected peptideester derivatives were
<i>meso</i>-Tetrakis(α,α,α,α-<i>o</i>-amidophenyl)porphinatoiron(II) Bearing a Proximal Histidyl Group at the β-Pyrrolic Position via an Acyl Bond: Synthesis and O<sub>2</sub>Coordination in Aqueous Media
meso-Tetrakis(α,α,α,α-o-(1-methylcyclohexanamido)phenyl)porphinatoiron(III) bearing a proximal histidyl group at the β-pyrrolic position via an acyl bond (4c) has been synthesized. Human serum albumin (HSA) incorporating the ferrous complex (4d) formed a stable O2 adduct under physiological conditions (pH 7.4, 37 °C). Although an electron-withdrawing acyl group is attached to the porphyrin periphery, the O2-binding affinity of HSA-4d was slightly higher than that of a similar analogue with a histidyl–alkylene group (2d).