Studies on the Himbert Intramolecular Arene/Allene Diels–Alder Cycloaddition. Mechanistic Studies and Expansion of Scope to All-Carbon Tethers
作者:Yvonne Schmidt、Jonathan K. Lam、Hung V. Pham、K. N. Houk、Christopher D. Vanderwal
DOI:10.1021/ja4025963
日期:2013.5.15
The unusual intramolecular arene/allene cycloaddition described 30 years ago by Himbert permits rapid access to strained polycyclic compounds that offer great potential for the synthesis of complex scaffolds. To more fully understand the mechanism of this cycloaddition reaction, and to guide efforts to extend its scope to new substrates, quantum mechanical computational methods were employed in concert
30 年前由 Himbert 描述的不寻常的分子内芳烃/丙二烯环加成允许快速获得紧张的多环化合物,这些化合物为复杂支架的合成提供了巨大的潜力。为了更全面地了解这种环加成反应的机制,并指导将其范围扩展到新底物的努力,量子力学计算方法与实验室实验相结合。这些研究表明环加成很可能通过协同过程进行;在所研究的案例中,逐步双自由基机制显示出更高的能量。原始的 Himbert 环加成化学也从杂环系统扩展到碳环系统,并使用计算指导来预测热力学有利的情况。