Dicationic near-linear biphenyl benzimidazole derivatives as DNA-targeted antiprotozoal agents
摘要:
A series of near-linear biphenyl benzimidazole diamidines 5a-h were synthesized from their respective diamidoximes (4a-h), through the bis-O-acetoxyamidoxime, followed by hydrogenation in glacial acetic acid/ethanol in the presence of Pd-C. Compounds 4a-h were obtained in three steps, starting with the Suzuki coupling reaction of the appropriate haloarylcarbonitriles la-g or 4-bromo-2-fluorobenzaldehyde with 4-formylphenylboronic acid or 4-cyanophenylboronic acid to form the anticipated 4-formylbiphenyl carbonitrile analogues 2a-h. Subsequent condensation of the formyl derivatives 2a-h with 3,4-diaminobenzonitrile in the presence of sodium bisulfite or 1,4-benzoquinone gave the desired dinitriles 3a-h, the precursors for 4a-h. All the diamidines showed strong DNA affinities, as judged by high Delta T-m values with poly(dA.dT)(2). The compounds were quite active in vitro versus Trypanosoma brucei rhodesiense, giving IC50 values ranging from 3 to 37 nM. These compounds were even more active versus Plasmodium falciparum, exhibiting IC50 values ranging from 0.5 to 23 nM. The compounds showed moderate to good activity in vivo in the STIB900 model for acute African trypanosomiasis. The most active compounds 5b and e gave 3/4 cures on an IP dosage of 20 mg/kg. (c) 2005 Elsevier Ltd. All rights reserved.
Dicationic near-linear biphenyl benzimidazole derivatives as DNA-targeted antiprotozoal agents
摘要:
A series of near-linear biphenyl benzimidazole diamidines 5a-h were synthesized from their respective diamidoximes (4a-h), through the bis-O-acetoxyamidoxime, followed by hydrogenation in glacial acetic acid/ethanol in the presence of Pd-C. Compounds 4a-h were obtained in three steps, starting with the Suzuki coupling reaction of the appropriate haloarylcarbonitriles la-g or 4-bromo-2-fluorobenzaldehyde with 4-formylphenylboronic acid or 4-cyanophenylboronic acid to form the anticipated 4-formylbiphenyl carbonitrile analogues 2a-h. Subsequent condensation of the formyl derivatives 2a-h with 3,4-diaminobenzonitrile in the presence of sodium bisulfite or 1,4-benzoquinone gave the desired dinitriles 3a-h, the precursors for 4a-h. All the diamidines showed strong DNA affinities, as judged by high Delta T-m values with poly(dA.dT)(2). The compounds were quite active in vitro versus Trypanosoma brucei rhodesiense, giving IC50 values ranging from 3 to 37 nM. These compounds were even more active versus Plasmodium falciparum, exhibiting IC50 values ranging from 0.5 to 23 nM. The compounds showed moderate to good activity in vivo in the STIB900 model for acute African trypanosomiasis. The most active compounds 5b and e gave 3/4 cures on an IP dosage of 20 mg/kg. (c) 2005 Elsevier Ltd. All rights reserved.
Application of oxime-diversification to optimize ligand interactions within a cryptic pocket of the polo-like kinase 1 polo-box domain
作者:Xue Zhi Zhao、David Hymel、Terrence R. Burke
DOI:10.1016/j.bmcl.2016.08.098
日期:2016.10
potent previously known polo-like kinase 1 (Plk1) polo-box domain (PBD) binding inhibitors. This improved binding may result by accessing a newly identified auxiliary region proximal to a key hydrophobic cryptic pocket on the surface of the protein. Our findings could have general applicability to the design of PBD-binding antagonists.
[EN] DICATIONIC TRIARYL ANALOGS AS ANTI-PROTOZOAN AGENTS<br/>[FR] ANALOGUES TRIARYL DICATIONIQUES UTILISES EN TANT QU'AGENTS ANTIPROTOZOAIRES
申请人:UNIV NORTH CAROLINA
公开号:WO2005040132A1
公开(公告)日:2005-05-06
Novel dicationic, heterocyclic triaryl compounds are useful in the treatment of microbial infections, such as Trypanosoma brucei rhodesiense infection and Plasmodium falciparum infection. These compounds are accordingly useful in treating second-stage human African trypanosomiasis. Pharmaceutical formulations comprising these compounds can be used in methods of treating microbial infections.
The present application relates to a novel liquid crystal compound and a use thereof. The novel liquid crystal compounds of the present application can exhibit a smectic A phase over a wide temperature range. The novel liquid crystal compounds of the present application can be usefully used in the technical fields to which smectic A liquid crystals can be applied, for example, bistable devices.
Dicationic triaryl analogs as anti-protozoan agents
申请人:Boykin W. David
公开号:US20050148646A1
公开(公告)日:2005-07-07
Novel dicationic, heterocyclic triaryl compounds are useful in the treatment of microbial infections, such as
Trypanosoma brucei rhodesiense
infection and
Plasmodium falciparum
infection. These compounds are accordingly useful in treating second-stage human African trypanosomiasis. Pharmaceutical formulations comprising these compounds can be used in methods of treating microbial infections.
Agonists and Antagonists of the S1P5 Receptor, and Methods of Use Thereof
申请人:Harris Christopher M.
公开号:US20100216762A1
公开(公告)日:2010-08-26
Disclosed are compounds that are agonists or antagonists of the S1P
5
receptor, compositions comprising said compounds, and methods of using said compounds and compositions. In certain embodiments, said compounds are 1-benzylazetidine-3-carboxylic acid derivatives. In certain embodiments, said methods relate to the treatment of neuropatic pain and/or a neurodegenerative disorder. In certain embodiments, said compounds may be used in combination with a second therapeutic agent.