Facile approach to diverse range of 1,3-diaza-heterocycles: angular/linear selectivity paradigm and a remarkable intramolecular methyl migration
作者:Umesh A. Kshirsagar、Narshinha P. Argade
DOI:10.1016/j.tet.2009.04.088
日期:2009.7
diverse range of kinetically controlled angular and thermodynamically controlled linear tricyclic and tetracyclic 1,3-diaza-heterocycles have been described via the intramolecular cyclizations of the corresponding imides/anilic acid esters. The effect of imide stability on the angular/linear product selectivity has also been described. The kinetically controlled angular products were successfully transformed
从环状酸酐和2-氨基苄基氨基甲酸叔丁酯开始,已经通过相应的酰亚胺/苯胺的分子内环化描述了简单而有效的合成方法,该方法可简单有效地合成各种范围的动力学控制的角和热力学控制的线性三环和四环1,3-二氮杂杂环。酸酯。还描述了酰亚胺稳定性对角/线性产物选择性的影响。通过在甲醇或甲醇和乙酸的混合物中回流,将动力学控制的角产物成功转化为相应的热力学控制的线性产物。还描述了有趣的原位1,2-分子内甲基迁移。