Intermolecular cycloaddition of tosylhydrazones with nitriles was investigated. t-BuOK was shown to be an excellent base for increasing the effectiveness of the reaction in this protocol, and homocoupling of the tosylhydrazones was significantly inhibited by using xylene as a solvent. Through this transformation, a variety of 4,5-diaryl-2H-1,2,3-triazoles were prepared in good to excellent yields and with high purities. The process is azide-free and transition-metal-free.

中文翻译：

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叔丁醇钾促进甲苯磺酰腙和腈合成 4,5-二芳基-2H-1,2,3-三唑

研究了甲苯磺酰腙与腈的分子间环加成反应。t-BuOK 被证明是提高该协议中反应效率的极好基础，并且使用二甲苯作为溶剂显着抑制了甲苯磺酰腙的同偶联。通过这种转化，以良好到极好的收率和高纯度制备了多种 4,5-二芳基-2H-1,2,3-三唑。该工艺不含叠氮化物和过渡金属。