Arylazide Cycloaddition to Methyl Propiolate: DFT-Based Quantitative Prediction of Regioselectivity
作者:Giorgio Molteni、Alessandro Ponti
DOI:10.1002/chem.200204681
日期:2003.6.16
3-triazoles have been synthesized by 1,3-dipolar cycloaddition of the corresponding arylazides to methyl propiolate in carbon tetrachloride. The regioselectivity of these reactions cannot be rationalized on the basis of the electronic demands of the reactants or frontier molecular-orbital theory. Therefore, we applied to this problem a quantitative formulation of the HSAB principle to this problem
通过将相应的芳基叠氮化物在四氯化碳中的1,3-偶极环加成成丙酸甲酯,已经合成了几种1(4-取代的)苯基-4-或5-甲氧基羰基-1,2,3-三唑。这些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。因此,我们在密度泛函理论中针对此问题应用了HSAB原理的定量表述。在真空和四氯化碳中(通过COSMO方法),以B3LYP / 6-311 + G(d,p)的水平计算总体和局部反应性指数。已经确定了反应性相遇时电荷转移的方向,计算出的区域选择性与实验结果非常吻合。