The thermal C2–C6/[2 + 2] cyclisation of enyne-allenes: Reversible diradical formation
作者:Mehmet Emin Cinar、Chandrasekhar Vavilala、Jian Fan、Michael Schmittel
DOI:10.1039/c0ob01275k
日期:——
structurally designed toward the thermal C2–C6/[2 + 2] cyclisation mode, were prepared and characterised, one of them even by X-ray crystallography. The mechanism of their transformation to formal [2 + 2] cycloadducts was interrogated by trapping experiments and DFT computations. The results support a stepwise mechanism that involves the reversible formation of the C2–C6 diradical intermediate.
制备并表征了针对热C 2 -C 6 / [2 + 2]环化模式结构设计的新烯炔-丙烯,其中之一甚至通过X射线晶体学进行表征。通过诱捕实验和DFT计算研究了它们转化为正式的[2 + 2]环加合物的机理。结果支持逐步机理,该机理涉及C 2 -C 6双自由基中间体的可逆形成。