Application of multicomponent reactions to antimalarial drug discovery. Part 2: New antiplasmodial and antitrypanosomal 4-aminoquinoline γ- and δ-lactams via a ‘catch and release’ protocol
作者:Chitalu C. Musonda、Jiri Gut、Philip J. Rosenthal、Vanessa Yardley、Renata C. Carvalho de Souza、Kelly Chibale
DOI:10.1016/j.bmc.2006.04.035
日期:2006.8
A parallel synthesis of a new series of 4-aminoquinoline gamma- and delta-lactams synthesized via the Ugi 3-component 4-centre multicomponent reaction is described. The basicity of the quinoline nitrogen was exploited in the purification of compounds via a 'catch and release' protocol. Yields ranging from 60% to 77% and purities as high as 96% were obtained. Compound 29, the most active against a chloroquine-resistant W2 strain of Plasmodium falciparum with an IC50 of 0.096 mu M, also inhibited recombinant falcipain-2 in vitro (IC50 = 17.6 mu M). Compound 17 inhibited the growth of Trypanosoma brucei with an ED50 of 1.44 mu M whilst exhibiting a favourable therapeutic index of 409 against a human KB cell line. (c) 2006 Elsevier Ltd. All rights reserved.