Iron(0)-Catalyzed Transfer Hydrogenative Condensation of Nitroarenes with Alcohols: A Straightforward Approach to Benzoxazoles, Benzothiazoles, and Benzimidazoles
作者:Ramachandra Reddy Putta、Simin Chun、Seung Hyun Choi、Seok Beom Lee、Dong-Chan Oh、Suckchang Hong
DOI:10.1021/acs.joc.0c02191
日期:2020.12.4
the redox condensation of o-hydroxynitrobenzene with alcohol, leading to the formation of benzoxazole derivatives. A wide range of 2-substituted benzoxazoles were synthesized in good to excellent yields without the addition of an external redox agent. A series of control experiments provided a plausible mechanism. Furthermore, the reaction system was successfully extended to the synthesis of benzothiazoles
铁催化的氢转移策略已经应用于邻羟基硝基苯与醇的氧化还原缩合,导致形成苯并恶唑衍生物。在不添加外部氧化还原剂的情况下,合成了范围广泛的2-取代的苯并恶唑,收率良好至优异。一系列对照实验提供了一个合理的机制。此外,该反应体系已成功扩展到苯并噻唑和苯并咪唑的合成。