由于铁与毒力之间的联系以及在感染过程中依赖于血红素作为铁源的依赖性,因此需要新的治疗靶标来对抗多重耐药性感染,例如铜绿假单胞菌的铁调节血红素加氧酶(HemO)。本文中,我们报道了一系列基于亚氨基胍的HemO抑制剂的合成和活性。化合物23对铜绿假单胞菌PAO1的结合亲和力为5.7μM,MIC 50为52.3μg/ mL 。通过将HemO活性与biliverdin-IXα依赖的红外荧光蛋白偶联来进行细胞内活性测定,其中化合物23显示EC 50为11.3μM。该化合物对铜绿假单胞菌的临床分离物显示出增强的活性,进一步证实了靶途径。这类抑制剂通过结合变构位点起作用。这种新型的结合位点是在计算机上提出的,并由饱和转移差异(STD)NMR和氢交换质谱(HXMS)支持。
Iminoguanidines as Allosteric Inhibitors of the Iron-Regulated Heme Oxygenase (HemO) of <i>Pseudomonas aeruginosa</i>
作者:Geoffrey A. Heinzl、Weiliang Huang、Wenbo Yu、Bennett J. Giardina、Yue Zhou、Alexander D. MacKerell、Angela Wilks、Fengtian Xue
DOI:10.1021/acs.jmedchem.6b00757
日期:2016.7.28
a series of iminoguanidine-based inhibitors of HemO. Compound 23 showed a bindingaffinity of 5.7 μM and an MIC50 of 52.3 μg/mL against P. aeruginosa PAO1. An in cellulo activity assay was developed by coupling HemO activity to a biliverdin-IXα-dependent infrared fluorescent protein, in which compound 23 showed an EC50 of 11.3 μM. The compounds showed increased activity against clinical isolates of
由于铁与毒力之间的联系以及在感染过程中依赖于血红素作为铁源的依赖性,因此需要新的治疗靶标来对抗多重耐药性感染,例如铜绿假单胞菌的铁调节血红素加氧酶(HemO)。本文中,我们报道了一系列基于亚氨基胍的HemO抑制剂的合成和活性。化合物23对铜绿假单胞菌PAO1的结合亲和力为5.7μM,MIC 50为52.3μg/ mL 。通过将HemO活性与biliverdin-IXα依赖的红外荧光蛋白偶联来进行细胞内活性测定,其中化合物23显示EC 50为11.3μM。该化合物对铜绿假单胞菌的临床分离物显示出增强的活性,进一步证实了靶途径。这类抑制剂通过结合变构位点起作用。这种新型的结合位点是在计算机上提出的,并由饱和转移差异(STD)NMR和氢交换质谱(HXMS)支持。
[EN] GUANIDINE DERIVATIVES AND THEIR USE IN THE PRODUCTION OF A MEDICAMENT FOR BLOCKING XANTHINE OXIDASE/DEHYDROGENASE<br/>[FR] DERIVES DE GUANIDINE ET LEUR UTILISATION DANS LA PRODUCTION D'UN MEDICAMENT DESTINE A BLOQUER LES XANTHINE OXYDASES/DESHYDROGENASES
申请人:MELACURE THERAPEUTICS AB
公开号:WO2001025192A1
公开(公告)日:2001-04-12
The present invention relates to guanidine derivatives and pharmaceutically acceptable acid salts thereof. The invention further relates to pharmaceutical preparations containing said compounds, and the use of said compounds for treatment of any type of condition where the expression of xanthine oxidase/xanthine dehydrogenase enzymes is involved. The invention particularly relates to the use of these compounds in the preparation of a medicament for enhancing the survical of a transplanted cell, organ or tissue, or cell, organ or tissue to be transplanted.
A novel copper-catalyzed, hydrazine-free synthesis of N-1 unsubstituted 1H-indazoles using stable guanylhydrazone salts as substrates
作者:Szymon P. Rekowski、Bettina K. Kroener、Deepika Kathuria、Aabid A. Wani、Sumit S. Chourasiya、Jürgen Conrad、Prasad V. Bharatam、Wolfgang Frey、Uwe Beifuss
DOI:10.1016/j.tet.2021.132192
日期:2021.7
A CuI-catalyzed, hydrazine-free transformation of 2-(2-bromoarylidene)guanylhydrazone hydrochlorides using Cs2CO3 as a base and DMEDA as a ligand at 120 °C for 5 h delivers substituted 1H-indazoles with yields up to 75%. The C,N double bond configuration of the substrates was determined by NMR experiments and quantum chemical calculations. The reaction mechanism was studied using quantum chemical calculations
使用 Cs 2 CO 3作为碱和 DMEDA 作为配体在CuI 催化下无肼转化 2-(2-溴亚芳基)脒腙盐酸盐,在 120 °C 下转化5 小时,生成取代的 1 H-吲唑,产率高达 75 %。底物的 C,N 双键构型由核磁共振实验和量子化学计算确定。使用量子化学计算研究了反应机理。