Fragment based search for small molecule inhibitors of HIV-1 Tat-TAR
摘要:
Basic molecular building blocks such as benzene rings, amidines, guanidines, and amino groups have been combined in a systematic way to generate ligand candidates for HIV-1 TAR RNA. Ranking of the resulting compounds was achieved in a fluorimetric Tat-TAR competition assay. Although simple molecules such as phenylguanidine are inactive, few iteration steps led to a set of ligands with IC50 values ranging from 40 to 150 mu M. 1,7-Diaminoisoquinoline 17 and 2,4,6-triaminoquinazoline 22 have been further characterized by NMR titrations with TAR RNA. Compound 22 is bound to TAR at two high affinity sites and shows slow exchange between the free ligand and the RNA complex. These results encourage investigations of dimeric ligands built from two copies of compound 22 or related heterocycles. (C) 2014 Elsevier Ltd. All rights reserved.
13C and1H NMR studies of structure and tautomerism in some perimidines
作者:P. D. Woodgate、J. M. Herbert、W. A. Denny
DOI:10.1002/mrc.1260260304
日期:1988.3
The 13C NMR spectra of some 1- and 2-substituted perimidines and perimidinium salts are discussed and assigned. Although the spectra of most of the 2-substituted perimidines are comparatively simple, several examples display 13C and 1H spectral characteristics indicative of inhibition of prototropic tautomerism.
Potential antitumor agents. 53. Synthesis, DNA binding properties, and biological activity of perimidines designed as minimal DNA-intercalating agents
作者:John M. Herbert、Paul D. Woodgate、William A. Denny
DOI:10.1021/jm00394a025
日期:1987.11
A series of compounds based on perimidine have been synthesized and evaluated for their DNA-binding properties and antitumor activity. The fused tricyclic permidine chromophore appears to be the minimal structural requirement for intercalative binding to DNA since the mode of binding could be dictated by the position of attachment of the side chain. The intercalating compounds have DNA association constants (log K = 5.8-6.5) and cytotoxic potencies (IC50 = 500-1500 nM) comparable to those shown by other classes of linear, tricyclic DNA-intercalating antitumor agents (acridinecarboxamides, phenazinecarboxamides), but none of the compounds showed in vivo activity.
Liu, Kang-Chien; Chen, Hsiu-Ho, Journal of Heterocyclic Chemistry, 1984, vol. 21, p. 911 - 912
作者:Liu, Kang-Chien、Chen, Hsiu-Ho
DOI:——
日期:——
LIU, KANG-CHIEN;CHEN, HSIU-HO, J. HETEROCYCL. CHEM., 1984, 21, N 3, 911-912
作者:LIU, KANG-CHIEN、CHEN, HSIU-HO
DOI:——
日期:——
BURKHARDT U.; JOHNE S., J. PRAKT. CHEM., 328,(1986) N 2, 237-244