New potent 5-substituted benzofuroxans as inhibitors of Trypanosoma cruzi growth: Quantitative structure–activity relationship studies
作者:Gabriela Aguirre、Lucía Boiani、Mariana Boiani、Hugo Cerecetto、Rossanna Di Maio、Mercedes González、Williams Porcal、Ana Denicola、Oscar E. Piro、Eduardo E. Castellano、Carlos Mauricio R. Sant’Anna、Eliezer J. Barreiro
DOI:10.1016/j.bmc.2005.07.072
日期:2005.12
Due to the well-known benzofuroxan tautomerism, in both approaches (2D- and 3D-QSAR) it was necessary to include an indicator variable to consider the N-oxide position (I(6)). This parameter was established using low-temperature NMR experiments. Both QSAR models identified the electrophilic character of the substituent alpha-atom as a requirement for activity. Further support was found using a density
苯并呋喃类衍生物已被证明可抑制南美锥虫病的病原体克氏锥虫的生长。因此,建立了2D-和3D-QSAR体外抗chagasic活动的模型。合成了六种新的衍生物,以完成最终一组26种结构多样的苯并呋喃。2D-QSAR模型(r = 0.939,r(adj)(2)= 0.849)是使用列表取代基的理化性质和指标变量的多元回归分析生成的。此外,使用比较分子场分析(CoMFA)获得了3D-QSAR模型(r(2)= 0.997,q(2)= 0.802)。由于众所周知的苯并呋喃类互变异构现象,在两种方法(2D和3D-QSAR)中,都必须包括一个指示剂变量以考虑N-氧化物的位置(I(6))。该参数是使用低温NMR实验确定的。两种QSAR模型都将取代基α-原子的亲电特性确定为活性的要求。使用密度泛函理论(DFT)方法发现了进一步的支持。