Regioselective Cycloadditions of Phosphonyl Nitrile Oxides with Vinylphosphonate and Phosphaalkyne
作者:Li-li Shen、Yong Ye、Yong Luo、Lun-zu Liu
DOI:10.1080/10426500902917651
日期:2010.2.23
1,3-Dipolar cycloaddition reactions are important synthetic manipulations allowing the construction of five-membered heterocycles. In this article, we report the cycloaddition of phosphonyl nitrile oxides with vinylphosphonate and phosphaalkyne to form the unexpected 2:1 cycloaddition product with excellent levels of regiocontrol product. The structures of title compounds were confirmed by 1H NMR,
1,3-偶极环加成反应是重要的合成操作,允许构建五元杂环。在这篇文章中,我们报告了膦酰腈氧化物与乙烯基膦酸酯和磷炔的环加成反应,形成了意想不到的 2:1 环加成产物,具有出色的区域控制产物水平。标题化合物的结构经 1H NMR、31P NMR、MS 和 IR 确认。使用密度泛函理论(DFT)方法探索了环加成的机制。