New heteroaryl nitrones with spin trap properties: Identification of a 4-furoxanyl derivative with excellent properties to be used in biological systems
作者:Germán Barriga、Claudio Olea-Azar、Ester Norambuena、Ana Castro、Williams Porcal、Alejandra Gerpe、Mercedes González、Hugo Cerecetto
DOI:10.1016/j.bmc.2009.11.053
日期:2010.1
A new series of heteroaryl nitrones, 1–7, bearing furoxanyl and thiadiazolyl moieties, were evaluated for their free radical-trapping properties. The physicochemical characterization by electron paramagnetic resonance (EPR) demonstrated its capability to trap and stabilize oxygen-, carbon-, sulfur-, and nitrogen-centered free radicals. The 4-furoxanyl nitrone 3 (FxBN), α(Z)-(3-methylfuroxan-4-yl)-N-tert-butylnitrone
一系列新的杂芳基硝酮,1 - 7,轴承furoxanyl和噻二唑基部分,测试它们的自由基俘获性能评价。通过电子顺磁共振(EPR)进行的物理化学表征表明,它具有捕获和稳定以氧,碳,硫和氮为中心的自由基的能力。4 furoxanyl硝酮3(FxBN),α(ž) - (3-methylfuroxan -4-基) - ñ -叔-丁基硝酮在水溶液中显示适当的溶解度,并考虑到这种理化性质对生物学应用非常重要,因此我们从捕获和动力学行为方面对其进行了深入研究。为此,对羟基加合物衰变的动力学研究得出速率常数k ST为1.22×10 10 dm 3 mol -1 s -1,在生理pH下半衰期高达7200 s,没有任何人为信号。还证明了FxBN能够直接捕获和稳定超氧自由基的能力,在生理pH值下的半衰期为1620 s。此外,FxBN-羟基和-超氧化物加合物表现出不同的和特征性的EPR光谱图。最后,我们确认