Synthesis of 2-arylbenzo-1,3-tellurazoles by oxidative cyclization of 2,2′-ditellurobis[N-(arylmethylene)benzenamines
作者:Samantha R. Ponzo、Frank R. Fronczek、Thomas Junk
DOI:10.1016/j.jorganchem.2023.122938
日期:2024.1
A method has been developed to prepare 2-arylbenzo-1,3-tellurazoles from bis(2-aminophenyl) ditelluride and aromatic aldehydes by oxidative cyclization following an easily implemented one pot procedure. Imines obtained by combining aldehyde and ditelluride were cyclized with phosphorous oxychloride without prior purification, resulting in the formation of benzo-1,3-tellurazoles carrying aryl or heteroaryl
开发了一种由双(2-氨基苯基)二碲化物和芳香醛通过氧化环化按照易于实施的一锅法制备2-芳基苯并-1,3-碲唑的方法。将醛和二碲化物混合得到的亚胺无需事先纯化,用三氯氧化磷环化,形成2位带有芳基或杂芳基取代基的苯并-1,3-碲唑,产率高达58%。提供了自由基反应途径的证据。该方法与其他方法的区别在于避免了强还原条件并最大限度地减少了制备芳基取代的苯并-1,3-碲唑所需的合成工作。2-(2-喹啉基)苯并-1,3-碲唑的 X 射线晶体学表征表明仅存在微弱的 TeˑˑˑN 二次键合相互作用。