C-2-Aryl O-substituted HI-236 derivatives as non-nucleoside HIV-1 reverse-transcriptase inhibitors
作者:Roger Hunter、Yassir Younis、Clare I. Muhanji、Tanith-lea Curtin、Kevin J. Naidoo、Melissa Petersen、Christopher M. Bailey、Aravind Basavapathruni、Karen S. Anderson
DOI:10.1016/j.bmc.2008.10.048
日期:2008.12.15
Several novel thiourea derivatives of the NNRTI HI-236 substituted at the C-2 oxygen of the phenyl ring have been synthesized and evaluated for their inhibitory activity against HIV-1 ( IIIB) replication in MT-2 cell cultures. The compounds were synthesized in order to fine-tune the activity of HI-236 as well as to gain insight into spatial characteristics in the pocket pertaining to the positional choice of tether in the design of [NRTI]-tether-[HI-236] bifunctional inhibitors. Two of the thiourea derivatives bearing a butynyl (6c) or hydroxyethyl tether (6n) were endowed with improved anti-HIV activity compared to HI-236. NNRTI activity was confirmed by a cell-free RT assay on six of the derivatives in which 6c returned an IC50 of 3.8 nM compared to 28 nM for HI-236, establishing it as an improved lead for HI-236. The structure-activity pro. le is discussed in terms of potential interactions in the NNRTI pocket as suggested by a docking model using AutoDock, which have a bearing on the bifunctional drug design. (C) 2008 Elsevier Ltd. All rights reserved.