Thiophene-Based Diamidine Forms a “Super” AT Binding Minor Groove Agent
摘要:
The DNA minor groove is the interaction site for many enzymes and transcription control proteins and as a result, development of compounds that target the minor groove is an active research area. In an effort to develop biologically active minor groove agents, we are preparing and exploring the DNA interactions of a systematic set of diamidine derivatives with a powerful array of methods including DNase 1 footprinting, biosensor-SPR methods, and X-ray crystallography. Surprisingly, conversion of the parent phenyl-furan-phenyl diamidine to a phenyl-thiophene-benzimiclazole derivative yields a compound with over 10-fold-increased affinity for the minor groove at AT sequences. Single conversion of the furan to a thiophene or a phenyl to benzimidazole does not cause a similar increase in affinity. X-ray results indicate a small bond angle difference between the C-S-C angle of thiophene and the C-O-C angle of furan that, when amplified out to the terminal amidines of the benzimidazole compounds, yields a very significant difference in the positions of the amidines; and their DNA interaction strength.
Transition-Metal-Catalyzed Selective Cyclization Strategy to 2-Substituted Benzofurans and Indoles en Route to the Oxa Analogues of Isocryptolepine
作者:Satrajit Indu、Parthasarathi Subramanian、Krishna P. Kaliappan
DOI:10.1002/ejoc.201402869
日期:2014.11
A selective catalytic route to benzofurans and indolesfrom similar starting materials has been developed. A two-step protocol that involves a transition-metal-catalyzed domino Sonogashira coupling between 2-ethynylanilines and 2-iodophenols followed by selective O- and N-cyclizations afforded 2-(benzofuran-2-yl)anilines and 2-(indol-2-yl)phenols, respectively. The 2-(benzofuran-2-yl)anilines were
Bichalcophenes: A concise synthesis of formyl ester- and cyano ester-substituted bithiophenes, bifurans, and furanothiophenes
作者:Abdelbasset A. Farahat、Arvind Kumar、Alaa El-Din M. Barghash、Fatma E. Goda、Hassan M. Eisa、David W. Boykin
DOI:10.1002/jhet.295
日期:——
Syntheses of new formylester- and cyanoester-substitutedbithiophenes, bifurans, and furanothiophenes in good yield are described. The key synthetic step uses Stille coupling of appropriately substituted bromo 5-ring heterocycles with stannyl-substituted 5-ring heterocycles.
Compounds, compositions and methods for treating or preventing viral infections and associated diseases
申请人:——
公开号:US20020052396A1
公开(公告)日:2002-05-02
Compounds, compositions and methods are provided for the treatment and prophylaxis of infections and associated diseases caused by viruses of the Flaviviridae family by administering certain rhodanine derivatives, and analogs thereof, tri- and tetracyclic rhodanine alkanoic acids and rhodanine benzoic acids being particularly effective.
A modular design for minor groove binding and recognition of mixed base pair sequences of DNA
作者:Pu Guo、Ananya Paul、Arvind Kumar、Narinder K. Harika、Siming Wang、Abdelbasset A. Farahat、David W. Boykin、W. David Wilson
DOI:10.1039/c7cc06246j
日期:——
The design and synthesis of compounds that target mixed, AT/GC, DNAsequences is described. The design concept connects two N-methyl-benzimidazole-thiophene single GC recognition units with a flexible linker that lets the compound fit the shape and twist of the DNAminorgroove while covering a full turn of the double helix.