potent organic compounds. A facile synthesis of 2,4,5-trisubstituted oxazoles through an oxidative, copper-catalyzed, and solvent-free annulation is described. Various arylated oxazoles were efficaciously synthesized at a mild temperature from readily available substrates under a molecular oxygen atmosphere. Preliminary mechanistic studies suggested that the reaction proceeds via an anionic-type mechanism
sp 3
碳的功能化被认为在合成有机
化学中具有挑战性,但在生产有效有机化合物方面具有巨大潜力。描述了通过
氧化、
铜催化和无溶剂环化轻松合成
2,4,5-三取代
恶唑。在温和的温度下,在分子
氧气氛下,从容易获得的底物有效地合成了各种芳基化的
恶唑。初步的机理研究表明,反应通过阴离子型机制进行,并表明形成了
酮-
亚胺中间体。该反应以六个
氢原子的提取、一个 sp 2
碳和两个 sp 3
碳的官能化以及 C–O 和 C–N 键的形成而著称。