Ligand-free copper-catalyzed efficient one-pot access of benzo[b]pyrido[3,2-f][1,4]oxazepinones through O-heteroarylation-Smiles rearrangement-cyclization cascade
作者:Nemai C. Ganguly、Pallab Mondal、Sushmita Roy、Partha Mitra
DOI:10.1039/c4ra11128a
日期:——
Efficient synthesis of a library of novel benzopyrido[1,4]oxazepinones was accomplished by Cs2CO3-mediated one-pot coupling of N-substituted-o-chloronicotinamides and o-halogenated phenols using cuprous oxide catalysis in DMF at 120 °C through an O-heteroarylation-Smiles rearrangement-cyclization cascade (16 examples). The C–N bond construction process is biased in favour of Smiles rearrangement allowing
通过在120°C的DMF中使用氧化亚铜催化Cs 2 CO 3介导的N-取代-邻氯烟酰胺和邻卤代酚的一锅偶联,可以有效合成新型的苯并吡啶并[1,4] a嗪酮类化合物。通过O-杂芳基-Smiles重排-环化级联反应(16个例子)。C–N键的构建过程偏向于Smiles重排,从而允许这些三环分子结构的区域选择性生成,基本没有Goldberg- N-芳基化产物,且收率良好。