A novel method for the synthesis of 1,4‐diketones from β‐ketosulfones was developed by means of a visible light‐induced CSbondactivation process. Symmetrical and unsymmetrical 1,4‐diketones can be easily prepared in moderate to good yields.
Inhibition of the HIV-1 rev–RRE complex formation by unfused aromatic cations
作者:G Xiao
DOI:10.1016/s0968-0896(00)00344-8
日期:2001.5
RNA viruses cause a wide range of human diseases. Development of new agents to target such viruses is an active area of research. Towards this goal, a series of diphenylfuran cations as potential inhibitors of the Rev-RRE complex have been designed and synthesized. Analysis of the interaction of the diphenylfurans with RRE and TAR RNA model systems by gel shift assays indicates that they exhibit both sequence and structure-dependent binding modes. Our results show a strong interaction between the diphenylfuran ring system and RRE bases, while the TAR interactions are much weaker with the compounds that are the best inhibitors of Rev-RRE. (C) 2001 Elsevier Science Ltd. All rights reserved.
Structural Selectivity of Aromatic Diamidines
作者:Jonathan B. Chaires、Jinsong Ren、Donald Hamelberg、Arvind Kumar、Vandna Pandya、David W. Boykin、W. David Wilson
DOI:10.1021/jm049491e
日期:2004.11.1
Competition dialysis was used to study the interactions of 13 substituted aromatic diamidine compounds with 13 nucleic acid structures and sequences. The results show a striking selectivity of these compounds for the triplex structure poly dA:(poly dT)(2), a novel aspect of their interaction with nucleic acids not previously described. The triplex selectivity of selected compounds was confirmed by thermal denaturation studies. Triplex selectivity was found to be modulated by the location of amidine substiuents on the core phenyl-furan-phenyl ring scaffold. Molecular models were constructed to rationalize the triplex selectivity of DB359, the most selective compound in the series. Its triplex selectivity was found to arise from optimal ring stacking on base triplets, along with proper positioning of its amidine substituents to occupy the minor and the major-minor grooves of the triplex. New insights into the molecular recognition of nucleic acid structures emerged from these studies, adding to the list of available design principles for selectively targeting DNA and RNA.
Discovery of new G-quadruplex binding chemotypes
作者:Stephan A. Ohnmacht、Ehsan Varavipour、Rupesh Nanjunda、Ingrida Pazitna、Gloria Di Vita、Mekala Gunaratnam、Arvind Kumar、Mohamed A. Ismail、David W. Boykin、W. David Wilson、Stephen Neidle
DOI:10.1039/c3cc48616h
日期:——
We report a novel furan-based low molecular weight chemotype with high G-quadruplex affinity and potent anti-proliferative activity.
我们报告了一种新颖的基于呋喃的低分子量化学类型,具有高G-四链体亲和力和强效的抗增殖活性。
One-Step Preparation of Symmetrical 1,4-Diketones from α-Halo Ketones in the Presence of Zn-I<sub>2</sub> as a Condensation Agent
Eleven 1,4-diphenylbutane-1,4-diones have been prepared in one step from the corresponding α-halo acetophenones under the action of Zn-I2 as a condensation agent with moderate to high yields. The mechanistic pathway of the reaction can be explained by the Wurtz-like self-condensation of α-halo ketones. Similarly, 3-chloropentane-2,4-dione gave 3,4-diacetylhexane-2,5-dione, a Wurtz-like condensation product.