Selective C-N Bond-Forming Reaction of 2,6-Dibromopyridine with Amines
作者:Lei Wang、Ning Liu、Bin Dai、Hengcai Hu
DOI:10.1002/ejoc.201402619
日期:2014.10
A practical and efficient protocol for the syntheses of 6-substituted 2-bromopyridine compounds has been developed by using a selective copper-catalyzedC–N bond-forming reaction between 2,6-dibromopyridine and a range of amines. The major advantage of this protocol is the complete control of selectivity of the pyridine bromine atom for the C–N cross-coupling reaction. There are few reported syntheses
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