Cobalt-Catalyzed Oxidative Isocyanide Insertion to Amine-Based Bisnucleophiles: Diverse Synthesis of Substituted 2-Aminobenzimidazoles, 2-Aminobenzothiazoles, and 2-Aminobenzoxazoles
作者:Tong-Hao Zhu、Shun-Yi Wang、Gao-Nan Wang、Shun-Jun Ji
DOI:10.1002/chem.201300239
日期:2013.5.3
Cobalt catalysis: Synthesis of substituted 2‐aminobenzimidazoles, 2‐aminobenzothiazoles, and 2‐aminobenzoxazoles was achieved by using cobalt(II) acetate catalyzed isocyanide insertion to o‐diaminobenzene, 2‐aminobenzenethiol, and 2‐aminophenol derivatives in 1,4‐dioxane (see scheme). It was found that the reaction proceeded efficiently to give the desired products in up to 95 % isolated yields by
钴催化:使用乙酸钴(II)催化异氰酸酯插入1,4-二恶烷中的邻-二氨基苯,2-氨基苯硫醇和2-氨基苯酚衍生物,可合成取代的2-氨基苯并咪唑,2-氨基苯并噻唑和2-氨基苯并恶唑(请参阅方案)。发现该反应有效地进行,通过一步形成CN和CS(O,N),以高达95%的分离产率得到所需的产物。