Phosphine-Free Well-Defined Mn(I) Complex-Catalyzed Synthesis of Amine, Imine, and 2,3-Dihydro-1<i>H</i>-perimidine via Hydrogen Autotransfer or Acceptorless Dehydrogenative Coupling of Amine and Alcohol
作者:Kalicharan Das、Avijit Mondal、Debjyoti Pal、Hemant Kumar Srivastava、Dipankar Srimani
DOI:10.1021/acs.organomet.9b00131
日期:2019.4.22
report the synthesis of amines/imines directly from alcohol and amines via hydrogen autotransfer or acceptorless dehydrogenation catalyzed by well-defined phosphine-free Mn complexes. Both imines and amines can be obtained from the same set of alcohols and amines using the same catalyst, only by tuning the reaction conditions. The amount and nature of the base are found to be a highly important aspect for
用无毒,富含地球的过渡金属代替昂贵的贵金属是催化的首要目标,如果使用对空气和水分稳定的配体支架,这将特别有意义。在本文中,我们报告了通过明确定义的无膦锰配合物催化的氢自动转移或无受体脱氢,直接从醇和胺中合成胺/亚胺。仅通过调节反应条件,就可以使用相同的催化剂从相同的一组醇和胺获得亚胺和胺。发现碱的量和性质对于观察到的选择性是非常重要的方面。伯胺和仲胺都已用作N-烷基化反应的底物。作为重点,我们展示了白藜芦醇衍生物的化学选择性合成。此外,还已经证明了H-亚嘧啶。还进行了密度泛函理论计算,以模拟反应路径并计算反应曲线。