Acid-Promoted Hydrolysis of m-Cl-Phenyl Phosphorotriamidate leading to its Highly Basic Nature by Kinetic Means
作者:Harish Amb、Shashi Prabha
DOI:10.13005/ojc/310220
日期:2015.6.20
Hydrolysis of m-Cl-Phenyl Phosphorotriamidate has been performed in the acid range, 0.01to 7.0M –HCl,in 12%AcoH-H2O (v/v) at 98(±0.5) oC. The continuous second-order rate rise with the absence of a rate maximum in the entire acid range is significant, leading to its highly basic nature. In this respect, it differs from other related(o-Cl-Ph-&p-Cl-Ph-) members of the phosphorotriamidate group. The salt
在98%(±0.5)oC的12%AcoH-H2O(v / v)中,在0.01至7.0M –HCl的酸性范围内,进行了间氯苯基磷酸三酰胺的水解。在整个酸范围内不存在最大速率的情况下,连续的二级速率上升是显着的,从而导致其高度碱性。在这方面,它不同于磷酰胺基氨基磷酸酯基团的其他相关的(邻-Cl-Ph-和p-Cl-Ph-)成员。盐效应变量研究导致两种主要反应性物种的存在和反应性,其中中性物种(I)在整个酸范围内起作用;而观察到的共轭酸形式(II)仅在4.0-7.0M HCl区域之间运行。对于CNP酯,已经确定了具有PN键裂变的两种反应形式的单分子和双分子机理。通过一系列亲核试剂的作用,显示出水解作用降低了,在这里I'显示了最佳的作用。氯基在水解过程中在每个芳基基团的不寻常间位中的作用特别重要。