DFT-HSAB Prediction of Regioselectivity in 1,3-Dipolar Cycloadditions: Behavior of (4-Substituted)benzonitrile Oxides towards Methyl Propiolate
作者:Alessandro Ponti、Giorgio Molteni
DOI:10.1002/chem.200500739
日期:2006.1.23
The regioselectivity of 1,3-dipolar cycloadditions between (4-substituted)benzonitrile oxides and methyl propiolate cannot be rationalized on the basis of the electron demand of the reactants or frontier molecular-orbital theory. To this problem, we have applied a quantitative formulation of the hard-soft acid-base principle developed within the density functional theory. Global and local reactivity
(4-取代的)苄腈氧化物与丙酸甲酯之间的1,3-偶极环加成反应的区域选择性不能根据反应物的电子需求或前沿的分子轨道理论来合理化。对于这个问题,我们应用了在密度泛函理论中发展的硬-软酸碱原理的定量公式。在B3LYP / 6-311 + G(d,p)水平上计算总体和局部反应性指数。已经阐明了反应性相遇时电荷转移的细节,并且已显示计算的区域选择性与实验数据高度吻合。