Aryl- and hetarylpyrazolines smoothly undergo photoaromatization under irradiation with the visible light (λ > 400 nm) in the presence of carbon tetrachloride. The reaction is accompanied by an increase in the acidity of the medium and a change in the fluorescence. The structure of pyrazoline and solvent considerably affect the photoaromatization rate. The mechanism of the reaction was proposed, which agrees with the experimental data.
在有
四氯化碳存在的情况下,芳基和
正十八烷基
吡唑在可见光(λ > 400 nm)照射下会顺利发生
光气化反应。反应伴随着介质酸度的增加和荧光的变化。
吡唑啉的结构和溶剂在很大程度上影响着光芳香化率。提出的反应机理与实验数据相符。