Cleavage of tertiary amidomethyl ester prodrugs of carboxylic acids by rat liver homogenates
作者:Jim Iley、Eduarda Mendes、Rui Moreira、Sofia Souza
DOI:10.1016/s0928-0987(99)00057-3
日期:1999.12
plasma hydrolyses, no dependence upon the pK(a) of the carboxylate leaving group was observed, nor was there any dependence upon the amide N-substituent. The rate of decomposition was inhibited by the carboxylesterase inhibitor eserine but not by the cytochrome P450 inhibitor SKF-525A, indicating the involvement of esterases in the hydrolysis reaction. These results indicate that amidomethyl esters
据报道,大鼠肝脏匀浆可水解羧酸叔酰胺基甲基酯前药。酰胺基甲基酯可快速定量地转化为相应的酸和仲酰胺。反应性反过来取决于酯的摩尔折射率和亲脂性,以及羧酸部分的空间体积。与化学和血浆水解相反,没有观察到对羧酸酯离去基团的pK(a)的依赖性,也没有对酰胺N-取代基的依赖性。分解速率受羧酸酯酶抑制剂丝氨酸抑制,但不受细胞色素P450抑制剂SKF-525A抑制,表明酯酶参与了水解反应。这些结果表明,预期可以在体内容易裂解酰胺基甲基酯。