Metal free synthesis of substituted 5-aryl/alkyl aminotetrazoles in water
作者:Venkata Hema Kumar、Sannapaneni Janardan、Ramana Tamminana
DOI:10.1016/j.tetlet.2023.154599
日期:2023.7
The synthesis of tetrazoles is established under metal free conditions at room temperature in the presence of open air. The reaction of 2-bromoaryl isothiocyantes with amines gives thiourea that undergoes reaction in situ with NaN3 using Iodine in the presence of water medium to afford 1-(2-bromophenyl)-N-5-arylaminotetrazoles via substitution followed by electrocyclization processes at ambient temperature
四唑的合成是在室温、露天存在的无金属条件下进行的。2-溴芳基异硫氰酸酯与胺反应生成硫脲,硫脲在水介质存在下使用碘与 NaN 3 进行原位反应,通过取代得到1- (2-溴苯基)-N -5-芳基氨基四唑,然后在环境温度下进行电环化过程温度。所有给电子和吸电子取代基都很容易发生反应,得到相应的最终产物2a–2ab产量中等至良好。该方法也适用于克级数量的四唑。此外,我们的水性胶束介质表现出良好的可回收活性,并且在最多四个循环中表现出良好的产品收率。