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为了能更深入地认识含氟新化合物作为农药的生物活性和其结构间的关系,建立有意义的药物-受体作用模型,寻找同类化合物的药效团,对合成的含氟化合物在经典QSAR方法研究的基础上,又进一步运用DISCO,CoMFA和Leapfrog方法研究了它们的三维构效关系.首先根据化学结构,将分子进行了分类,然后再分别进行CoMFA计算,根据第I类分子的CoMFA结果,我们进行了含氯化合物的全新设计.根据各类中较好的构效关系模型,我们进行了分子的改造,预测了它们的活性. 相似文献
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抗小麦赤霉病类含氟农药的3D-QSAR研究 总被引:2,自引:0,他引:2
用CoMFA方法对一组含氟农药分子的抗小麦赤霉病活性进行了定量构效关系研究。发现影响药效的立体场与静电场的贡献分别为90.3%和9.7%,立体场的影响是占主导性的。该模型非交叉验证的相关系数(r^2)为0.991,F值是297.524,标准偏差(S)为0.015,表明模型具有较好的预测能力。根据该模型,设计并预测了几个新的化合物,其活性都在0.96以上。经过研究表明在预测结构的某些位置添加位阻较大的基团,活性提高比较明显。 相似文献
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Based on the concept of Green Chemistry, a new procedure of finding bioactive compounds and their synthetic routes by computer-aided techniques was proposed. The procedure consists of pharmacophore search against a 3D structural database of natural products for lead discovery and computer-aided synthesis design for avoiding unuseful synthetic experiments. This work demonstrated that computer aided drug design and synthesis design would help us to make the consideration of environmental concerns systematically, rather than having to deal later with the unnecessary waste chemicals. Thus, it is shown that chemical computer-aided design (CAD) is an indispensable part of Green Chemistry. 相似文献
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