Efficient Synthesis of a Variety of New Functionalized Oxacalixarenes by Ullmann Coupling Reactions
作者:Fei Yang、Liwei Yan、Kuoyan Ma、Li Yang、Jihong Li、Lijuan Chen、Jinsong You
DOI:10.1002/ejoc.200500879
日期:2006.3
have developed an efficient method to synthesize a new type of oxacalix[4]arenes containing nitrogen functional groups in a single step, through N,N-dimethylglycine-promoted Ullmann coupling reactions starting from aryl dibromides in yields of up to 37 %. With a aryl difluoride as substrate, a large, fully aromatic crown ether 8 could be obtained in 25 % yield. Further functionalization of the nitrogen
我们开发了一种有效的方法,通过从芳基二溴化物开始的 N,N-二甲基甘氨酸促进的 Ullmann 偶联反应,一步合成含有氮官能团的新型氧杂杯 [4] 芳烃,产率高达 37%。使用芳基二氟化物作为底物,可以以 25% 的产率获得大的全芳香冠醚 8。这些氧杂杯芳烃核心中氮官能团的进一步功能化可能为构建所需的分子结构和一系列氮基多齿配体提供新的机会。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)