串联氧化碳-氢键氧官能化和噁唑环化构建2-酰基苯并噁唑

Aerobic Construction of 2-Acyl Benzoxazole by Tandem C—H Oxygenation and Oxazole Ring Formation

通过铜催化N-(邻羟基苯基)苯乙酰胺的一锅串联亚甲基碳-氢键氧基化以及噁唑环化,实现了有用的2-酰基苯并噁唑类化合物的合成.除了具有基于一步多键转化的独特步骤经济性,以同样原料选择性可控的2-亚甲基苯并噁唑合成以及在合成苯并噻唑方面的扩展应用也是本工作的重要优势.

The synthesis of useful 2-acyl benzoxazoles has been realized via the tandem methylene C—H oxygenation and oxazole annulation of N-(o-hydroxyphenyl)phenylacetamides via copper catalysis in one-pot fashion. Besides featuring the incomparable step-economy resulting from the multi-step transformation, the tunable synthesis of diverse 2-methylene functionalized benzoxazoles using identical starting materials as well as the expanded synthesis of corresponding benzothiazoles is also attractive advantage of the work.