Synthesis and evaluation of the antioxidative potential of minoxidil–polyamine conjugates
摘要:
A series of conjugates (MNX-CO-PA) of minoxidil (MNX) with the polyamines (PAs) putrescine (PUT), spermidine (SPD) and spermine (SPM) as well as dopamine were produced through activation of MNX with N,N'-carbonyldiimidazole, followed by reaction with dopamine or selectively protected PAs and acid-mediated deprotection. These conjugates together with conjugates of the general type MNX-PA or PA-MNX-PA, readily produced using literature protocols, were tested as antioxidants. The most potent inhibitors of lipid peroxidation were the conjugates MNX SPM (2, 94%), SPM-MNX-SPM (4, 94%) and MNX-N-4-SPD (7, 91%) and MNX (91%). The most powerful lipoxygenase (LOX) inhibitors were MNX (IC50 = 20 mu M) and the conjugates MNX N-8-SPD (9, IC50 = 22.1 mu M), MNX-CO dopamine (11, IC50 = 28 mu M) and MNX-N-1-SPD (8, IC50 = 30 mu M). The most interesting conjugates 2, MNX-CO-PUT (5), 8 and 11 as well as MNX were generally found to exhibit weaker (22-36.5%) or no (conjugate 8) anti-inflammatory activity than indomethacin (47%) with the exception of MNX which showed almost equal potency (49%) to indomethacin. The cytocompatibility of conjugates and MNX at the highest concentration of 100 mu M showed a survival percentage of 87-107%, with the exception of conjugates with SPM (compound 2) and MNX-CO-SPM (6), which showed considerable cytotoxicity (survival percentage 8-14%). Molecular docking studies were carried on conjugate 9 and the parent compound MNX and were found to be in accordance with our experimental biological results. (C) 2013 Elsevier Masson SAS. All rights reserved.
Synthesis of minoxidil conjugates and their evaluation as HL-60 differentiation agents
摘要:
Activation of minoxidil (MNX) with N,N'-carbonyldiimidazole and coupling with natural polyamines (PAs) and commercially available aliphatic or aromatic amines provided a series of new conjugates which were evaluated for their ability to induce differentiation to HL-60 acute myeloid leukemia cancer cells, using a modified NBTZ reduction test. Although neither MNX nor 4,4'-methylenedianiline (MDA) or 2,7-diaminofluorene (DAF), alone or in combination, had any effect, the MNX-spermine (SPM) conjugate (11) and the conjugates 7 and 8 of MNX with MDA and DAF exhibited a differentiation-inducing effect at a concentration of 10 mu M without being toxic on proliferating human peripheral blood mononuclear cells. (C) 2016 Elsevier Ltd. All rights reserved.
Synthesis of novel 6-piperidin-1-ylpyrimidine-2,4-diamine 3-oxide substituted calix[4]arene as a highly selective and sensitive fluorescent sensor for Cu2+ in aqueous samples
In this study, we designed and synthesized a novel sensitive fluorescent sensor for Cu2+ cation by attaching two minoxidil molecules at the lower-rim of calix[4]arene annulus via the formation of two urea linkages. This chemosensor can selectively recognize Cu2+ in EtOH containing 5% H2O through a significant decline in fluorescence emission. The structure of the target molecule was determined by HRMS
在这项研究中,我们通过形成两个脲键,将两个米诺地尔分子连接在杯[4]芳烃环的下边缘,从而设计并合成了一种新颖的Cu 2+阳离子灵敏荧光传感器。该化学传感器可以通过荧光发射的显着下降来选择性地识别含有5%H 2 O的EtOH中的Cu 2+。通过HRMS,1 H NMR,13 C NMR和FT-IR确定靶分子的结构。
Synthetic studies toward the development of novel minoxidil analogs and conjugates with polyamines
作者:George E. Magoulas、Stavros E. Bariamis、Constantinos M. Athanassopoulos、Dionissios Papaioannou
DOI:10.1016/j.tetlet.2010.02.037
日期:2010.4
Syntheses of novel polyamine-modified minoxidil analogs (PMMs) and minoxidil-polyamine conjugates (MPCs) are described in an effort to improve the biological activity and selectivity of minoxidil and its poor solubility in water. (C) 2010 Elsevier Ltd. All rights reserved.