Kinetic and theoretical study on nucleofugality in the phenolysis of 3-nitrophenyl and 4-nitrophenyl 4-cyanophenyl thionocarbonates
作者:Enrique A. Castro、Alvaro Cañete、Paola R. Campodónico、Marjorie Cepeda、Paulina Pavez、Renato Contreras、José G. Santos
DOI:10.1016/j.cplett.2013.04.002
日期:2013.5
evaluate the nucleofugality of the corresponding leaving groups. For the reaction of 2 only 4-nitrophenoxide is obtained as leaving group. For the reaction of 1 the nucleofugality ratio 3-nitrophenoxide/4-cyanophenoxide is 1/3 from the corresponding T− intermediate. Theoretical calculations confirm the experimental results. From these results it can be concluded that the non-leaving group affects the
对3-硝基苯基4-氰基苯基硫代碳酸酯(1)和4-硝基苯基4-氰基苯基硫代碳酸酯(2)的酚醛化进行动力学研究,以评估相应离去基团的核键性。对于2的反应,仅获得4-硝基苯氧基作为离去基团。对于反应1的nucleofugality比率3-硝基苯酚/ 4- cyanophenoxide是从相应的T 1/3 -中间体。理论计算证实了实验结果。从这些结果可以得出结论,非离去基团影响核不纯率。