Synthesis and biological evaluation of novel pyrrolo[2,1-c][1,4]benzodiazepine prodrugs for use in antibody-directed enzyme prodrug therapy
作者:Luke A. Masterson、Victoria J. Spanswick、John A. Hartley、Richard H. Begent、Philip W. Howard、David E. Thurston
DOI:10.1016/j.bmcl.2005.10.017
日期:2006.1
The design, synthesis and evaluation of four novel pyrrolo[2,1-c][1,4]benzodiazepine (PBD) prodrugs (1a,b and 2a,b; Fig. 1) for potential use in carboxypeptidase G2 (CPG2)-based anti body-directed enzyme prodrug therapy (ADEPT) is reported. Although all four prodrugs were shown to be less cytotoxic than the released parent PBDs 3 and 4, the urea prodrugs 1b and 2b were found to be too unstable for use in ADEPT, whereas carbamates 1a and 2a are both stable in an aqueous environment and are good substrates for CPG2. (c) 2005 Elsevier Ltd. All rights reserved.