We have found selective conditions for methylation of 3-trifluoromethyl-1H-pyrazol-5-ol that allowed us to obtain mono-Me-substituted N1- and O-isomers as well N1,N2-, N1,O- and N2,O-disubstituted isomers. A tautomeric structure of the parent pyrazole and its Me-substituted derivatives was investigated using quantum-chemical calculations, X-ray diffraction analysis, IR and NMR spectroscopy. Besides
我们发现了3-三
氟甲基-1 H-
吡唑-5-醇甲基化的选择性条件,这使我们能够获得单-Me-取代的N 1-和O-异构体以及N 1,N 2-,N 1,O -和N 2,O-二取代的异构体。使用量子
化学计算,X射线衍射分析,IR和NMR光谱研究了母体
吡唑及其Me取代衍
生物的互变异构结构。此外,利用量子
化学计算来解释甲基化方向。在体内实验中评估了某些合成化合物的镇痛活性和急性毒性。