以Ttou 84为起点,设计了一类新型的咪唑并[1,2- a ]吡啶和咪唑并[1,2- b ]哒嗪联苯衍生物,以优化其对牛病毒性腹泻病毒复制的抑制作用( BVDV)和丙型肝炎病毒(HCV)。选择药物调节的三个位点,即中央杂环核心结构上的位置2、3和6。在测试的49个类似物中,只有化合物18j(3-(2'-hydroxybiphen-3-yl)-2-(2-甲氧基苯基)-6-(thien-3-yl)咪唑并[1,2- b ]哒嗪在HCV复制子系统中显示抗病毒活性,使人联想到选择性抑制(抑制60-70%)。化合物4f(3-(联苯-3-基)-2-(4-氟苯基)-6-苯硫基咪唑并[1,2- a吡啶]被证明是BVDV复制的最有选择性的抑制剂,与瘟病毒复制的已知抑制剂没有或仅有很小的交叉耐药性。4f的交叉电阻谱可能表明4f与BPIP,VP32947,AG110或LZ37没有与相同的结合位点相互作用。从针对
The synthesis of 3-amino-6-(hetero)arylpyridazines via palladium catalyzed cross-coupling reactions (Suzuki, Stille) on 3-amino-6-chloropyridazine (1a) and 3-amino-6-iodopyridazine (1b) has been investigated. Comparison of the results shows that there is no need to start from 1b. An improved method for the synthesis of compound 1b from 1a is also described.
[EN] INHIBITORS OF ANOCTAMIN 6 PROTEIN AND USES THEREOF<br/>[FR] INHIBITEURS DE LA PROTÉINE ANOCTAMINE 6 ET LEURS UTILISATIONS
申请人:ILDONG PHARMACEUTICAL CO LTD
公开号:WO2022157686A1
公开(公告)日:2022-07-28
The present invention relates to a new compound that can inhibit an anoctamin 6 protein, a composition comprising the compound, a method for preparing the compound, and a method for using the compound or composition.
New and efficient methods for the synthesis of 7-substituted-4-trifluoromethylpyrimido[1,2-b]pyridazin-2-one derivatives using either two-step Suzuki/heterocyclization, or two-step heterocyclization/substitution sequences are developed. A variety of substituted products are obtained in good to excellent yields from 3-amino-6-chloropyridazine and ethyl 4,4,4-trifluorobut-2-ynoate.
Competitive antagonism of insect GABA receptors by iminopyridazine derivatives of GABA
A series of 4-(6-imino-3-aryl/heteroarylpyridazin-1-yl) butanoic acids were synthesized and examined for antagonism of GABA receptors from three insect species. When tested against small brown planthopper GABA receptors, the 3,4-methylenedioxyphenyl and the 2-naphthyl analogues showed complete inhibition of GABA-induced fluorescence changes at 100 mu M in assays using a membrane potential probe. Against common cutworm GABA receptors, these analogues displayed approximately 86% and complete inhibition of GABA-induced fluorescence changes at 100 mu M, respectively. The 4-biphenyl and 4-phenoxyphenyl analogues showed moderate inhibition at 10 mu M in these receptors, although the inhibition at 100 mu M was not complete. Against American cockroach GABA receptors, the 4-biphenyl analogue exhibited the greatest inhibition (approximately 92%) of GABA-induced currents, when tested at 500 mu M using a patch-clamp technique. The second most active analogue was the 2-naphthyl analogue with approximately 85% inhibition. The 3-thienyl analogue demonstrated competitive inhibition of cockroach GABA receptors. Homology modeling and ligand docking studies predicted that hydrophobic 3-substituents could interact with an accessory binding site at the orthosteric binding site. (C) 2012 Elsevier Ltd. All rights reserved.
A small-molecule cell-based screen led to the identification of biphenylimidazoazines with highly potent and broad-spectrum anti-apicomplexan activity
An in vitro screening of the anti-apicomplexan activity of 51 compounds, stemming from our chemical library and from chemical synthesis, was performed. As a study model, we used Toxoplasma gondii (T. gondii), expressing beta-galactosidase for the colorimetric assessment of drug activity on parasites cultivated in vitro. This approach allowed the validation of a new series of molecules with a biphenylimidazoazine scaffold as inhibitors of T. gondii growth in vitro. Hence, 8 molecules significantly inhibited intracellular replication of T. gondii in vitro, with EC50 < 1 mu M, while being non-toxic for human fibroblasts at these concentrations. Most attractive candidates were then selected for further biological investigations on other apicomplexan parasites (Neospora caninum, Besnoitia besnoiti, Eimeria tenella and Plasmodium falciparum). Finally, two compounds were able to inhibit growth of four different apicomplexans with EC50 in the submicromolar to nanomolar range, for each parasite. These data, including the broad anti-parasite spectrum of these inhibitors, define a new generation of potential anti-parasite compounds of wide interest, including for veterinary application. Studies realized on E. tenella suggest that these molecules act during the intracellular development steps of the parasite. Further experiments should be done to identify the molecular target(s) of these compounds. (C) 2014 Elsevier Masson SAS. All rights reserved.