The title compounds have been prepared in excellent yields by the reaction of 5-aryl-2-phenylpyrazolo[1,5-c]pyrimidine-7(6H)-thiones with potassium hydroxide. The reactions of these pyrazolopyridones have been investigated. The ring system readily undergoes electrophilic substitution at the 7-position. They are converted to the corresponding pyrazolopyridinethiones on reaction with phosphorus pentasulfide. The structures of the above compounds were elucidated by their spectral characteristics.
通过5-芳基-2-
苯基
吡唑并[1,5-c]
嘧啶-7(6H)-
硫酮与
氢氧化钾的反应,以优异的收率制备了标题化合物。已经研究了这些
吡唑并
吡啶酮的反应。环系统很容易在7位发生亲电取代。它们与五
硫化二
磷反应转化为相应的
吡唑并
吡啶硫酮。通过光谱特征阐明了上述化合物的结构。