the cycloaddition reaction of phosphonyl nitrileoxides and the formation of an unexpected 2:1 cycloaddition product. It provides a direct route to triphosphonyl-substituted dihydroisoxazolyl dihydroisoxazoles and diphosphonyl-substituted dihydroisoxazolyl dihydroisoxazoles with excellent levels of regiocontrol product. Density functional theory studies of the reactions between nitrileoxides and acrylonitrile
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 nitrileoxides 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。