作者:Yasushi Igarashi、Erika Yanagisawa、Toshihiro Ohshima、Shuichi Takeda、Masaki Aburada、Ken-ichi Miyamoto
DOI:10.1248/cpb.55.328
日期:——
A series of carbamates of the phenolic compound 1 were prepared and evaluated in vivo as its prodrug. Each carbamate was orally administered to rats, and plasma concentrations of the parent compound 1 were measured with the passage of time. We judged which carbamate was suitable for the prodrug of 1 from both the AUC value of 1 and absence of the carbamate in plasma. The AUC value of 1 after oral administration of 2b was approximately 40-fold higher than that for an administration of 1, and the bioconversion from 2b to 1 was excellent. As a whole, di-substituted carbamates resulted in higher plasma concentrations of 1 than did mono-substituted ones. However di-substituted carbamates were almost always detected in plasma. As a result, we found that the ethycarbamoyl derivative 2b demonstrates the best prodrug property in this series.
酚类化合物1的一系列氨基甲酸酯被制备并作为前药在体内进行了评估。每种氨基甲酸酯被口服给予大鼠,并随着时间的推移测量母体化合物1的血浆浓度。我们从1的AUC值和血浆中无氨基甲酸酯存在这两方面来判断哪种氨基甲酸酯适合作为1的前药。口服给予2b后1的AUC值大约是直接给予1的40倍,且2b向1的生物转化非常出色。总体而言,双取代氨基甲酸酯导致1的血浆浓度高于单取代氨基甲酸酯。然而双取代氨基甲酸酯几乎总是被检测到在血浆中存在。因此,我们发现乙氨基甲酸酯衍生物2b在这一系列中显示出最佳的前药特性。