Synthesis of Benzodiazepines Through Ring Opening/Ring Closure of Benzimidazole Salts
作者:Sheng Tao、Qingqing Bu、Qianqian Shi、Donghui Wei、Bin Dai、Ning Liu
DOI:10.1002/chem.201905828
日期:2020.3.12
construction of the benzodiazepine ring derivatives are based on the condensation reactions of two highly functionalized synthons. The development of synthesis for these compounds, however, is hampered by the regioselectivity and atom economy. In this work, a one‐step synthesis of pyrido‐benzodiazepine backbones and its analogues is achieved through continuous ring‐opening hydrolysis of benzimidazole salts
吡咯并苯并二氮杂derivatives衍生物无疑是市售药物和候选药物中最重要的结构图案之一。构造苯二氮杂卓环衍生物的通常合成方法是基于两个高度官能化的合成子的缩合反应。然而,这些化合物的合成发展受到区域选择性和原子经济性的阻碍。在这项工作中,通过苯并咪唑盐的连续开环水解和分子内CH键的活化,一步一步合成了吡啶-苯并二氮杂backbone骨架及其类似物。通过控制实验和密度泛函理论(DFT)计算来探索反应机理。