作者:Natalia M. Rougier、Raquel V. Vico、Rita H. de Rossi、Elba I. Buján
DOI:10.1021/jo100541y
日期:2010.5.21
The reactivity of Fenitrothion (1) toward several O- and N-based nucleophiles, including ambident and α-nucleophiles, was investigated in basic media at 25 °C in water containing 2% 1,4-dioxane. In the reactions with HO− and HOO− quantitative formation of 3-methyl-4-nitrophenoxide (2) was observed indicating a SN2(P) pathway. In the reactions with NH2OH, NH2O−, and BuNH2, demethylfenitrothion (4) was
在25°C的碱性介质中,在含有2%1,4-二恶烷的水中,研究了Fenitrothion (1)对几种基于O和N的亲核试剂(包括环境亲和性和α-亲核试剂)的反应性。与HO反应-和HOO -定量形成3-甲基-4-硝基苯酚(的2)中观察到指示小号Ñ 2(P)通道。在用NH反应2 OH,NH 2 ö - ,和BuNH 2,demethylfenitrothion(4)具有沿形成2,表示S之间竞争Ñ 2(P)和S Ñ 2(C)通路; 没有S的证据在任何情况下均观察到N Ar途径。将观察到的速率常数分解为对应于S N 2(P)和S N 2(C)途径的值。4的产率取决于亲核试剂和反应的pH,在BuNH 2的情况下,其是主要产物。与HOO -,NH 2 OH,和NH 2 ö -观察到显著α效应,证实该反应的限速步骤的亲核体的参与。