Amino Acid Esters of Phenols as Prodrugs: Synthesis and Stability of Glycine, β-Aspartic acid, and α-Aspartic Acid Esters of p-Acetamidophenol
作者:Ildiko M. Kovach、Ian H. Pitman、Takeru Higuchi
DOI:10.1002/jps.2600700812
日期:1981.8
profiles were calculated for the hydrolysis of the glycine (II), β-aspartic acid (III), and α-aspartic acid (IV) esters of p-acetamidophenol (I) at 25° and μ = 1.0 M. The hydrolysis of esters II and III occurred predominantly via intermolecular reactions involving water, hydroxide ion, and the various ionic forms of the substrates. The hydrolysis of ester IV occurred predominantly via intramolecular reactions
计算了对乙酰氨基苯酚(I)在25°和μ= 1.0 M下的甘氨酸(II),β-天冬氨酸(III)和α-天冬氨酸(IV)酯的水解的pH速率分布。酯II和III的水解主要通过涉及水,氢氧根离子和各种离子形式底物的分子间反应发生。酯IV的水解主要通过分子内反应发生。甲酸根,乙酸根和磷酸根离子以及氨丁三醇对酯II降解的催化作用与它们对二氯乙酸乙酯的水解作用相似。在碳酸氢盐缓冲液中酯II水解的有效催化与涉及二氧化碳以及氨基甲酸酯中间体的形成和分解的机理是一致的。