Electronic effects of ruthenium-catalyzed [3+2]-cycloaddition of alkynes and azides
作者:Duen-Ren Hou、Ting-Chun Kuan、Yu-Kai Li、Richmond Lee、Kuo-Wei Huang
DOI:10.1016/j.tet.2010.09.099
日期:2010.11
azide-alkyne cycloaddition (RuAAC) reactions is presented and various electronic analyses were conducted to provide a basis in understanding the observed regioselectivity of the 1,2,3-triazole products. Computational studies using density functional theory (DFT) and atoms in molecules quantum theory (AIM) further yield fresh details on the electronic factors that determine the regioselectivity in the RuAAC
提出了钌催化的叠氮化物-炔烃环加成(RuAAC)反应的组合实验和理论研究,并进行了各种电子分析,为理解所观察到的1,2,3-三唑产物的区域选择性提供了基础。使用密度泛函理论(DFT)和分子中的原子量子理论(AIM)进行的计算研究进一步得出了决定RuAAC中区域选择性的电子因素的新细节。发现1,2,3-三唑产物的形成是不可逆的,并且从Hammett研究中,排除了涉及乙烯基阳离子中间体的途径。电子效应有利于5-电子给体基团取代的1,2,3-三唑的形成。