Kinetics and mechanism of intramolecular carboxylic acid participation in the hydrolysis of N-methoxyphthalamic acid
作者:M. Niyaz Khan、Azhar Ariffin
DOI:10.1039/b300662j
日期:2003.4.14
than the corresponding rate constants for the formation of PAn from o-carboxybenzohydroxamic acid (OCBA). These observations are ascribed to the consequence of the occurrence of slightly different mechanisms in these reactions.
在CH3CN-H2O混合溶剂中分光光度法研究了在酸性pH下N-甲氧基邻苯二甲酸(NMPA)的水裂解中邻苯二甲酸酐(PAn)中间体的形成和消失速率。由NMPA形成PAn的速率几乎与混合水性溶剂中乙腈含量从20%到70%v / v的变化无关。由NMPA形成PAn的速率常数比由邻羧基苯并异羟肟酸(OCBA)形成PAn的速率常数小大约10倍。这些观察结果归因于这些反应中发生机制略有不同的结果。