We reported in this study the hydroboration of enamides in methanol at room temperature catalyzed by copper complexes. Under such conditions, a Gram-scale reaction with a high yield was also completed. Hydroboration of 3-methylene, 2-(alkyl and phenylisoindolin-1-one 5 with bis(pinacolato)diboron yields the respective compounds 6 in good yields with high-to-moderate enantioselectivity (58% ee). Furthermore, the antimicrobial properties of the synthesized compounds were tested against four indicator microorganisms: the two Gram-positive bacteria L. monocytogenes ATCC 1911 and S. aureus ATCC 6538, the Gram-negative bacterium S. typhimurium ATCC 14028, and the fungus C. albicans (ATCC 90028). The MIC values of compounds 5-6 range from 0.312 to 2.5 (μg/mL) against L. monocytogenes, from 2.1 to 0.136 (μg/mL) against S. aureus, and from 0.126 to 0.923 (μg/mL) against S. typhimurium.
Evaluation of Ruthenium(II) N-Heterocyclic Carbene Complexes as Antibacterial Agents and Inhibitors of Bacterial Thioredoxin Reductase
作者:Hilke Burmeister、Pascal Dietze、Lutz Preu、Julia E. Bandow、Ingo Ott
DOI:10.3390/molecules26144282
日期:——
A series of ruthenium(II) complexes with N-heterocycliccarbene (NHC) ligands of the general type (arene)(NHC)Ru(II)X2 (where X = halide) was prepared, characterized, and evaluated as antibacterial agents in comparison to the respective metal free benzimidazolium cations. The ruthenium(II) NHC complexes generally triggered stronger bacterial growth inhibition than the metal free benzimidazolium cations
制备了一系列具有一般类型 (芳烃)(NHC)Ru(II)X 2 (其中 X = 卤化物)的N-杂环卡宾 (NHC) 配体的钌 (II) 配合物,并对其作为抗菌剂进行了表征和评估。与相应的不含金属的苯并咪唑鎓阳离子的比较。钌(II) NHC 络合物通常比不含金属的苯并咪唑鎓阳离子引发更强的细菌生长抑制作用。对革兰氏阳性菌(枯草芽孢杆菌和金黄色葡萄球菌)的作用比对革兰氏阴性菌(大肠杆菌、鲍曼不动杆菌、铜绿假单胞菌)的作用强得多,并且所有复合物对真菌白色念珠菌均无活性。所选复合物对细菌硫氧还蛋白还原酶具有中等抑制作用,表明对该酶的抑制可能是抗菌作用的一个促成因素。
Benzimidazolin-2-ylidene N-heterocyclic carbene complexes of ruthenium as a simple catalyst for the N-alkylation of amines using alcohols and diols
for the alkylation of amines using alcohols as alkylating agents. Catalysts 1, 2 and 3a gave excellent yields of up to 99% for the alkylation of various amines using benzylic and aliphatic alcohols at 130 °C for 18 h undersolventlessconditions. Catalyst 3a bearing both phosphine and carbene ligands gave excellent yields of up to 98% for the synthesis of heterocyclic amines by double alkylation of primary
Efficient <i>in situ</i> N-heterocyclic carbene palladium(<scp>ii</scp>) generated from Pd(OAc)<sub>2</sub> catalysts for carbonylative Suzuki coupling reactions of arylboronic acids with 2-bromopyridine under inert conditions leading to unsymmetrical arylpyridine ketones: synthesis, characterization and cytotoxic activities
by 1H-NMR, 13C 1H} NMR and IR techniques, which support the proposed structures. Catalysts generated in situ were efficiently used for the carbonylative cross-coupling reaction of 2 bromopyridine with various boronic acids. The reaction was carried out in THF at 110 °C in the presence of K2CO3 under inert conditions and yields unsymmetrical arylpyridine ketones. All N,N-substituted benzimidazole salts
成功合成了N , N-取代的苯并咪唑盐,并通过1 H-NMR、 13 C 1 H} NMR 和 IR 技术进行了表征,支持了所提出的结构。原位生成的催化剂可有效用于 2 溴吡啶与各种硼酸的羰基化交叉偶联反应。该反应在THF中、110℃、K 2 CO 3存在下、惰性条件下进行,生成不对称芳基吡啶酮。本工作中研究的所有N 、 N取代苯并咪唑盐2a-i和4a-i 均针对其针对人类癌细胞系(例如 MDA-MB-231、MCF-7 和 T47D)的细胞毒活性进行了筛选。 N 、 N-取代的苯并咪唑2e和2f表现出最大的细胞毒性作用,具有良好的细胞毒性活性,针对MDA-MB-231的IC 50值分别为4.45 μg mL -1 ,针对MCF7的IC 50 值分别为4.85 μg mL -1 。
[EN] METHOD FOR TREATING FIBROSIS AND CANCER WITH IMIDAZOLIUM AND IMIDAZOLINIUM COMPOUNDS<br/>[FR] PROCÉDÉ DE TRAITEMENT DE LA FIBROSE ET DU CANCER AVEC DE L'IMIDAZOLIUM ET DES COMPOSÉS À BASE D'IMIDAZOLINIUM
申请人:AGENCY SCIENCE TECH & RES
公开号:WO2009096905A1
公开(公告)日:2009-08-06
There is presently provided methods for delivering an anti-fibrotic or anti-cancer agent to a cell. The methods comprise contacting a cell with an effective amount of imidazolium and imidazolinium compounds as described herein, including imidazolium and imidazolinium salts.
the mechanical constraints imposed by the ligating framework. Complexation with CuI and AgI with the reference unidentate carbene ligand Q, derived from the benzimidazolium precursor QH+, was studied for comparison. Both metals in MeCN form 1 : 1 and 1 : 2 complexes with the carbene ligand Q according to two stepwise equilibria. Q complexes of both metals are labile with respect to metal substitution