Kinetics of the Reaction between 2-Phenylpropionitrile and 2-Chloro-5-nitrotrifluoromethylbenzene under Phase-Transfer Catalysis
作者:Sofía Varela Calafat、Edgardo N. Durantini、Stella M. Chiacchiera、Juana J. Silber
DOI:10.1021/jo0483320
日期:2005.6.1
Phase-transfer catalysis (PTC) is a widely accepted methodology in organic synthesis. Although a great number of organic syntheses were reported in PTC conditions, systematic kinetic studies are scarce. In the present report, a detailed study of the kinetics of the reaction between 2-chloro-5-nitrotrifluoromethylbenzene (CNTFB) and 2-phenylpropionitrile anion (HPP-), under PTC, was performed under
相转移催化(PTC)是有机合成中一种广泛接受的方法。尽管在PTC条件下报道了许多有机合成方法,但缺乏系统的动力学研究。在本报告中,将2-氯-5- nitrotrifluoromethylbenzene(CNTFB)和2-苯基丙腈阴离子(HPP之间的反应的动力学的详细研究- ),PTC下,在几个条件下进行。将反应物在甲苯或氯苯作为有机相使用四烷基铵(Q任一中进行,在NaOH的浓缩水溶液的存在+ X -)盐作为相转移催化剂。主要产物为2-(4-硝基-2-三氟甲基苯基)-2-苯基丙腈,其产率取决于实验条件。对该机制的不同方面进行了讨论和量化。通过界面机制解释了动力学数据,该界面机制涉及吸附的亲核试剂前体的去质子化,然后通过其催化剂介导的萃取至有机相。假定使用多组分Langmuir型界面。虽然OH提取-通常忽略了催化剂向有机相的分解,还研究了导致催化剂中毒的底物水解产物的形成。确定了该副反应对主要