Cycloaddition of keteniminium with terminal alkynes toward cyclobuteniminium and their use in Diels–Alder reactions
作者:Alexandre Lumbroso、Saron Catak、Sarah Sulzer-Mossé、Alain De Mesmaeker
DOI:10.1016/j.tetlet.2014.07.059
日期:2014.9
dienes to afford cyclobutanone derivatives in good yields. A density functional theory (DFT) based computational study has been performed to obtain insight into the nature of the cycloaddition reactions and to investigate the difference in reactivity of cyclobuteniminium salts. Finally, the usefulness of cyclobutanone derivatives has been demonstrated by ring expansion reactions affording lactone, lactame
通过“一锅” [2 + 2] / [4 + 2]序列(包括酮亚胺盐和环丁烯胺盐作为关键中间体),已经开发出有效获得环丁酮衍生物的途径。经由酮亚胺盐和炔的[2 + 2]环加成,已经制备了多种新型的环丁亚胺盐。然后,通过Diels-Alder反应与各种二烯进一步转化生成的[2 + 2]加合物,以高收率得到环丁酮衍生物。已经进行了基于密度泛函理论(DFT)的计算研究,以深入了解环加成反应的性质并研究环丁烯鎓盐的反应性差异。最后,环丁酮衍生物的有用性已通过提供内酯,内酰胺和环戊酮衍生物的扩环反应得到了证明。