characterised by NMR, HRMS, elemental analysis and X-ray crystallography for complex 3b. These complexes were applied to Sonogashiracross-coupling reactions between aryl bromides and phenylacetylene in DMF at 80 °C. All palladium complexes were stable and showed high catalytic activity in Sonogashira reactions at low catalyst loading and ambient reaction conditions.
Palladium PEPPSI complexes: Synthesis and catalytic activity on the Suzuki-Miyaura coupling reactions for aryl bromides at room temperature in aqueous media
Abstract A new series of palladium N-heterocyclic carbene complexes having methoxyethyl on the side chain (3a–d, 4a–e) have been synthesized and fully characterized by NMR, HRMS and IR. Next, the palladium-NHC-PEPPSI complexes 3a-e and 4a-e were used as catalyst in Suzuki-Miyauracouplingreactions were investigated for aryl bromides at roomtemperature in aqueous media. 3a-d and 4a-e complexes showed
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 。
Benzimidazolium sulfonate ligand precursors and application in ruthenium-catalyzed aromatic amine alkylation with alcohols
New benzimidazolium sulfonate salts have been prepared and fully characterized. They have been associated in situ with [RuCl2(p-cymene)]2 to generate efficient catalytic systems operating at 120 °C under neat conditions in the presence of potassium tert-butylate for selective N-alkylation of primary aromatic amines into secondary amines.
[EN] RUTHENIUM-BASED COMPLEX CATALYSTS<br/>[FR] CATALYSEURS COMPLEXES À BASE DE RUTHÉNIUM
申请人:GOVERNING COUNCIL OF UNIVERSITY OF TORONTO
公开号:WO2013024119A1
公开(公告)日:2013-02-21
The present invention provides novel Ruthenium-based transition metal complex catalysts comprising specific ligands, their preparation and their use in hydrogenation processes. Such complex catalysts are inexpensive, thermally robust, and olefin selective.