A reappraisal of the role of the E1cB mechanism of hydrolysis of phosphoramidic derivatives
作者:Neil K. Hamer、Robert D. Tack
DOI:10.1039/p29740001184
日期:——
lead to the conclusion that, despite considerable differences in rate with varying degree of N-substitution, there is no important contribution from an E1cB process such as operates for related phosphoramidic halides and acyl carbamates. On the basis of the results of studies on the relative rates and direction of cleavage in the basic solvolysis of some OS-dimethyl phosphoramidothioates and phosphoramidodithioates
已测量了一系列芳基氨基氨基磷酸酯和硫代氨基磷酸酯的碱溶剂分解速率;结果得出的结论是,尽管速率随N取代程度的不同而有很大差异,但E 1cB工艺(例如对相关的磷酰胺卤化物和酰基氨基甲酸酯的操作)并没有重要的贡献。根据对某些OS-二甲基磷酰胺基硫代酸酯和磷酰胺基二硫代酸酯的基本溶剂分解中相对裂解速率和裂解方向的研究结果,与较早的建议相反,有人提出P-O和P-S裂解均主要发生亲核攻击引起的,尽管对后者的某些贡献可能是由消除机制引起的。