Catalyzed by BiCl3, aromatic o-diamines reacted with ketones efficiently to produce 1,5-benzodiazepines in good to excellent yields by condensation–cyclization reaction. Using aldehydes as substrates, mono- or disubstituted benzimidazoles were obtained as the final products. All reactions were carried out under mild reaction conditions and showed good functional group compatibility.
在 BiCl 3催化下,芳香族邻二胺与酮有效反应,通过缩合环化反应以良好至优异的收率生成 1,5-苯二氮卓类化合物。使用醛作为底物,得到单或二取代的
苯并咪唑作为最终产物。所有反应均在温和的反应条件下进行,表现出良好的官能团相容性。