One-Pot Tandem Synthesis of 2-Arylbenzoxazole Derivatives via Copper-Catalyzed CN and CO Bond Formation
作者:Veerababurao Kavala、Donala Janreddy、Mustafa J. Raihan、Chun-Wei Kuo、Chintakunta Ramesh、Ching-Fa Yao
DOI:10.1002/adsc.201200164
日期:2012.8.13
nucleophiles resulted in the formation of benzoxazole derivatives. This procedure involves copper-catalyzed one-pot tandem CN/CO coupling reactions. No ligand was used in the reaction, even in the cases of primary or secondary amides, which were used as N-nucleophiles. However, L-proline was used as ligand in the case of N-aromatic heterocycles like indole, imidazole and pyrazole derivatives.
2-(2-卤代苯基)卤代苯甲酰胺与一系列氮亲核试剂的反应导致形成苯并恶唑衍生物。该程序涉及铜催化的一锅串联CN / CO偶联反应。即使在伯酰胺或仲酰胺用作N-亲核试剂的情况下,反应中也没有使用配体。然而,在N-芳族杂环如吲哚,咪唑和吡唑衍生物的情况下,L-脯氨酸被用作配体。