Synthesis and evaluation of unsymmetrical bis(arylcarboxamides) designed as topoisomerase-Targeted anticancer drugs
作者:Julie A Spicer、Swarna A Gamage、Graeme J Finlay、William A Denny
DOI:10.1016/s0968-0896(01)00249-8
日期:2002.1
Symmetrical dimers of lipophilic intercalating chromophores linked by cation-containing chains have recently been shown to have broad-spectrum in vivo anticancer activity. We report the preparation and evaluation of a series of both symmetric and unsymmetric dimers of a variety of intercalating chromophores of varied DNA binding strength, including naphthalimides, acridines, phenazines, oxanthrenes and 2-phenylquinolines. The unsymmetrical dimers were prepared by sequential coupling of the chromophores to linkers with selectively protected primary terminal amines to ensure high yields and unequivocal product. Protection of the internal (secondary) amines as BOC derivatives was used to ensure complete structural specificity, and was also an aid to the purification of these very polar compounds. The growth inhibitory abilities (as IC50 values) of the compounds in a range of cell lines showed that the nature of the linker chain was important, and independent of the nature of the chromophore, with compounds containing the dicationic linker [-(CH2)(2)NH(CH2)(2)NH(CH2)(2)-] being on average 30-fold more potent than the corresponding compounds containing the monocationic linker [-(CH2)(3)NMe(CH2)(3)-]. However, the chromophores also play a role in determining biological activity, with the cytotoxicities of symmetric and unsymmetric dicationic dimers correlating with the overall DNA binding abilities of the chromophores. (C) 2001 Elsevier Science Ltd. All rights reserved.
Exploring unsymmetrical dyads as efficient inhibitors against the insect β-N-acetyl-d-hexosaminidase OfHex2
作者:Qi Chen、Peng Guo、Lin Xu、Tian Liu、Xuhong Qian、Qing Yang
DOI:10.1016/j.biochi.2013.10.008
日期:2014.2
The GH20 beta-N-acetyl-D-hexosaminidase OfHex2 from the insect Ostrinia furnacalis (Guenee) is a target potential for eco-friendly pesticide development. Although carbohydrate-based inhibitors against beta-Nacetyl-D-hexosaminidases are widely studied, highly efficient, non-carbohydrate inhibitors are more attractive due to low cost and readily synthetic manner. Based on molecular modeling analysis of the catalytic domain of OfHex2, a series of novel naphthalimide-scaffold conjugated with a small aromatic moiety by an alkylamine spacer linker were designed and evaluated as efficiently competitive inhibitors against OfHex2. The most potent one containing naphthalimide and phenyl groups spanning by an N-alkylamine linker has a K-i value of 0.37 mu M, which is 6 fold lower than that of M-31850, the most potent non-carbohydrate inhibitor ever reported. The straightforward synthetic manners as well as the presumed binding model in this paper could be advantageous for further structural optimization for developing inhibitors against GH20 beta-N-acetyl-D-hexosaminidases. (C) 2013 Elsevier Masson SAS. All rights reserved.
Development of a Cr(<scp>iii</scp>) ion selective fluorescence probe using organic nanoparticles and its real time applicability
作者:Anu Saini、Aman K. K. Bhasin、Narinder Singh、Navneet Kaur
DOI:10.1039/c5nj01843a
日期:——
Recognition of Cr(iii) ion using highly selective fluorescent organic nanoparticles N1 and its validation using DFT geometry optimization.
使用高度选择性荧光有机纳米颗粒N1识别Cr(iii)离子,并使用DFT几何优化进行验证。
Bis-N-Heterocyclic Carbene Complexes of Coinage Metals Containing Four Naphthalimide Units: A Structure–Emission Properties Relationship Study
作者:Zohreh Hendi、Sirous Jamali、Seyed Mohamad J. Chabok、Ali Jamjah、Hamidreza Samouei、Zahra Jamshidi
DOI:10.1021/acs.inorgchem.1c01302
日期:2021.9.6
their structure and photophysical properties. Here the preparation of a series of tetrameric naphthalimide molecules in which naphthalimide units are linked by bis-N-heterocyclic carbene complexes of coinage metals is described. An in-depth structural investigation into these tetramers has been carried out in solution and the solid state using spectroscopic methods, X-ray crystallography, and computational