An Efficient and Environmental Benign Synthesis of 2-benzimidazoles and 2-benzothiazoles Using CeCl<sub>3</sub>-NaI as Catalyst
作者:Xun Zhu、Yunyang Wei
DOI:10.3184/174751913x13575704209748
日期:2013.2
A one-pot condensation of an aldehyde with 1,2-phenylenediamine or 2-aminothiophenol in dimethyl carbonate at 100 °C under O2 in the presence of catalytic amounts of CeCl3–NaI gave an imine intermediate, which cyclised and dehydrogenated to give 2-arylbenzimidazoles or 2-arylbenzothiazoles in good yields.
醛与 1,2-苯二胺或 2-氨基苯硫酚在碳酸二甲酯中于 100 °C 在 O2 和催化量的 CeCl3-NaI 存在下进行一锅缩合得到亚胺中间体,该中间体环化并脱氢得到 2-芳基苯并咪唑或 2-芳基苯并噻唑收率良好。