Kinetics and Mechanism of the Anilinolysis of Aryl N,N-Dimethyl Phosphoroamidochloridates in Acetonitrile
作者:Hasi Rani Barai、Hai Whang Lee
DOI:10.5012/bkcs.2014.35.3.753
日期:2014.3.20
The nucleophilic substitution reactions of Y-aryl N,N-dimethyl phosphoroamidochloridates with substituted anilines and deuterated anilines are kinetically investigated in acetonitrile at 65.0 C. A stepwise mechanism with a rate-limiting leaving group departure from the intermediate is proposed based on the positive ρXY value. The deuterium kinetic isotope effects involving deuterated anilines show
Y-芳基N,N-二甲基氨基氯代磷酸酯与取代苯胺和氘代苯胺的亲核取代反应在乙腈中在65.0 C下进行了动力学研究。基于正ρXY提出了一种限速离去基团离开中间体的逐步机理。价值。涉及氘代苯胺的氘动力学同位素效应显示出与所有亲核试剂的二次反相,通过主要的背面亲核攻击合理化。