Synthesis and biological activity of β-glucuronyl carbamate-based prodrugs of paclitaxel as potential candidates for ADEPT
作者:Dries B.A. de Bont、Ruben G.G. Leenders、Hidde J. Haisma、Ida van der Meulen-Muileman、Hans W. Scheeren
DOI:10.1016/s0968-0896(96)00249-0
日期:1997.2
The syntheses of prodrugs of paclitaxel, which can be used in ADEPT in order to target paclitaxel towards tumor cells, are described. The prodrugs 1 and 2a,b consist of a spacer molecule connected via a carbamate linkage to a beta-glucuronic acid. The spacer molecule is also connected via an ester linkage to the 2'-OH of paclitaxel. Enzyme-catalyzed hydrolysis of the glucuronic acid moiety by human beta-glucuronidase results in the liberation of the parent drug paclitaxel via gamma or delta lactam formation with half-lives of 45 min and 2h (1 and 2h). The prodrugs 1 and 2b are two orders of magnitude less cytotoxic than paclitaxel. (C) 1997, Elsevier Science Ltd.