Studies towards the Design and Synthesis of Novel 1,5-Diaryl-1H-imidazole-4-carboxylic Acids and 1,5-Diaryl-1H-imidazole-4-carbohydrazides as Host LEDGF/p75 and HIV-1 Integrase Interaction Inhibitors
Synthesis and biological relationships of 3′,6-substituted 2-phenyl-4-quinolone-3-carboxylic acid derivatives as antimitotic agents
作者:Ya-Yun Lai、Li-Jiau Huang、Kuo-Hsiung Lee、Zhiyan Xiao、Kenneth F. Bastow、Takao Yamori、Sheng-Chu Kuo
DOI:10.1016/j.bmc.2004.09.041
日期:2005.1
decreased significantly if a chlorine or methoxy group replaced the fluorine atom. 3'-Fluoro-6-methoxy-2-phenyl-4-quinolone-3-carboxylic acid (68) had the highest in vitro cytotoxic activity among all tested carboxylic acid derivatives and their salts. The mechanism of action may be similar, but not identical, to that of tubulin binding drugs, such as navelbine and taxol. Compound 68 merits further investigation
Role of Hetero-Halogen (F···X, X = Cl, Br, and I) or Homo-Halogen (X···X, X = F, Cl, Br, and I) Interactions in Substituted Benzanilides
作者:Susanta K. Nayak、M. Kishore Reddy、Tayur N. Guru Row、Deepak Chopra
DOI:10.1021/cg101544z
日期:2011.5.4
A series of halogen-substituted benzanilides have been synthesized and characterized, and crystallization studies directed toward generation of polymorphs have been performed to delineate the importance of interactions involving halogens. The effect of halogen substitution on the molecular conformation and supramolecular packing has been investigated. The N-H center dot center dot center dot O H-bond is a key structure-directing element acting in conjunction with C-H center dot center dot center dot O and C-H center dot center dot center dot pi interactions. In addition, it is of importance to note that organic fluorine prefers Type I F center dot center dot center dot F contacts, whereas Cl, Br, and I prefer Type II contacts. Hetero-halogen center dot center dot center dot halogen interactions on the other hand are predominately of Type II geometry, and this is due to the greater polarizability of the electron density associated with the heavier halogens. It is of importance to evaluate the contributing role of these interactions in crystal structure packing and the co-operativity associated with such interactions in the solid state.
Benzisothiazolones as modulators of macrophage migration inhibitory factor
作者:William L. Jorgensen、Alexander Trofimov、Xin Du、Alissa A. Hare、Lin Leng、Richard Bucala
DOI:10.1016/j.bmcl.2011.05.127
日期:2011.8
Substituted N-phenylbenzisothiazolones have been investigated as inhibitors of the tautomerase activity of the proinflammatory cytokine MIF (macrophage migration inhibitory factor). Numerous compounds were found to possess antagonist activity in the low micromolar range with the most potent being the 6-hydroxy analog 1w. Compound 1w and the p-cyano analog 1c were also shown to exhibit significant inhibition of the binding of MIF to its transmembrane receptor CD74. Consistently, both compounds were also found to retard the MIF-dependent phosphorylation of ERK1/2 in human synovial fibroblasts. (C) 2011 Elsevier Ltd. All rights reserved.