3D QSAR分子描述符和人工神经网络的组合已用于预测各种部分氟化有机化合物的亲氟性,即全氟(甲基环己烷)/甲苯分配系数的自然对数。预测的平均误差小于0.2实验误差的两倍。多元线性回归证明效率低得多。为了更好地表征氟分配现象,将特定的氟定义为氟的亲和性以及被排出的氟溶剂与进入的溶质分子的范德华体积比的乘积。这个无量纲的术语在化合物家族中与所计算的氟分子的希尔德布兰德参数具有很好的相关性。
Fluorinated Heterocyclic Compounds. A Photochemical Approach to a Synthesis of Polyfluoroaryl-1,2,4-triazoles
摘要:
The reaction of some fluorinated 1,2,4-oxadiazoles in the presence of methylamine or propylamine has been investigated. The irradiation in methanol or acetonitrile leads with acceptable yields to the corresponding fluorinated 1-methyl- or 1-propyl-1,2,4-triazole.