Synthesis and intramolecular ring transformation of <i>N</i>,<i>N</i>′-dialkylated 2,6,9-triazabicyclo[3.3.1]nonadienes
作者:Yumi Nakaike、Yusuke Yoshida、Soichi Yokoyama、Akitaka Ito、Nagatoshi Nishiwaki
DOI:10.1039/d0ob01950j
日期:——
first and facile synthesis of N,N′-dialkylated 2,6,9-triazabicyclo[3.3.1]nonadienes was achieved by the [4 + 4] self-condensation of β-formyl-β-nitroenamine in the presence of ammonium acetate. The 2,6- and 2,9-dialkylated products were found to be interconvertible when dissolved in a solvent. This isomerization proceeds through intramolecular ring transformation via a common intermediate under equilibrium
N , N'-二烷基化 2,6,9-三氮杂双环[3.3.1]壬二烯的首次且简便的合成是通过 β-甲酰基-β-硝基烯胺在铵存在下的 [4 + 4] 自缩合实现的醋酸盐。发现 2,6-和 2,9-二烷基化产物溶解在溶剂中时可相互转化。这种异构化通过平衡下的共同中间体通过分子内环转化进行。