The effect of the structure of the catalyst and the type of base on the reaction rate and product yield of the tosylation of dihydroxybenzenes in a two-phase water–dichloromethane system in the presence of pyridine N-oxide derivatives was demonstrated. It was found that with 4-dimethylaminopyridine N-oxide and potassium carbonate it is possible to obtain dihydroxybenzene tosylates with yields of more than 90%.

中文翻译：

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在两相水-二氯甲烷系统中二羟基苯的有效甲苯磺酰化

证明了催化剂的结构和碱的类型对在吡啶 N-氧化物衍生物存在下在两相水 - 二氯甲烷体系中二羟基苯甲苯磺酰化反应速率和产物产率的影响。发现使用4-二甲氨基吡啶N-氧化物和碳酸钾可以以超过90%的产率获得二羟基苯甲苯磺酸盐。