molecular structures of complexes 6, 8 and 9 have been determined by single-crystal X-ray diffraction analysis. In addition, complexes 8 and 9 have been found to catalyze the acceptorless dehydrogenation of alcohols in toluene. 9 displayed high activity and different substrates, including cyclic and linear alcohols, were efficiently oxidized to ketones by using 2.0 mol% of catalyst.
Dinuclear indenyl ruthenium complexes were prepared and characterized using X-ray crystallography. Their crystal structures revealed the first examples of indenyl complexes containing an unusual η3 coordinationmode with bonding through the junction carbon and the adjacent carbons of the five- and six-membered rings of the indenyl ligand.
the novel trinuclearruthenium clusters (μ3‐η1:η2:η5–2‐phenyl‐3‐Cy2PC9H4)Ru3(CO)8 (1c) and [μ2‐η1–2‐(pyridin‐2‐yl)‐3‐Cy2PC9H6]Ru3(CO)9 (4a), respectively, via C─H bond cleavage. (2‐Mesityl‐1H‐inden‐3‐yl)dicyclohexylphosphine (2) reacted with Ru3(CO)12 in refluxing heptane to give the trinuclearruthenium cluster [μ‐2‐mesityl‐(3‐Cy2PC9H5)](μ2‐CO)Ru3(CO)9 (2c) via C─H bond cleavage and carbonyl insertion
用当量的(2-苯基-1 H-茚满-3-基)二环己基膦(1)和(2-吡啶基-1 H茚满-1-基)二环己基膦(4)处理Ru 3(CO)12回流庚烷,得到新颖的三核钌簇(μ 3 -η 1:η 2:η 5 -2-苯基-3--CY 2 PC 9 ħ 4)的Ru 3(CO)8(1C)和[μ 2 -η 1 –2‐(吡啶-2-基)‐3‐Cy 2 PC 9 H 6]的Ru 3(CO)9(图4a),分别通过C ─ H键裂解。在回流庚烷中,(2-Mesityl-1 H-茚满-3-基)二环己基膦(2)与Ru 3(CO)12反应生成三核钌簇[μ-2-mesityl-(3-Cy 2 PC 9 H 5)](μ 2 -CO)的Ru 3(CO)9(图2c)通过C ─ H键断裂和羰基插入。2-(蒽-9-基)-1 H-茚满-3-基二环己基膦(3)与Ru 3反应(CO)12在回流的正庚烷,得到双核钌簇[μ 2 -η 3:η 3 -2-(蒽-9-基)-3-CY
Synthesis and Molecular Recognition Studies on Small-Molecule Inhibitors for Thioredoxin Reductase
作者:Di Zhang、Zhonghe Xu、Jia Yuan、Ying-Xi Zhao、Zeng-Ying Qiao、Yu-Juan Gao、Guang-Ao Yu、Jingyuan Li、Hao Wang
DOI:10.1021/jm5012098
日期:2014.10.9
Thioredoxiin reductase (TrxR), which is overex pressed in many aggressive cancers, plays a crucial role in redox balance and antioxidant function, including defense of oxidative stress, control of cell proliferation, and regulation of cell apoptosis. Deactivation of TrxR can destroy the homeostatis of the cancer cells, inducing elevation of reactive oxygen species (ROS) levels and the oxidation of enzymatic substrates Here we synthesized and identified a new gold(I) small molecule (D9) that processes two strong electron-donating moieties i.e., 4-methylphenyl alkynyl and thionyldiphenyl phosephine exhibiting an enhanced p-pi conjuction effect. The resulting compound shows the increased soft Lewis-acids and the stability of gold(I) And we demonstrated that D9 could efficiently and specifically inhibit the activity of TrxR in vitro and in vivo, and it could effectively avoid the ligand exchange with albumin that was one of the mose abundant proteins in blood. We believe that these comprehensive studies on the relationship between the structure and performance will provide inspiring information on the precise synthesis and design of new compounds for targeting TrxR.
A general catalyst for Suzuki–Miyaura and Sonogashira reactions of aryl and heteroaryl chlorides in water
synthesis of 2-(3-sulfonatomesityl)-5-sulfonatoindenyl)dicyclohexylphosphine hydrate sodium salt and its use in palladium-catalyzed Suzuki–Miyaura and Sonogashiracoupling reactions in water (and biphasic water–organic solvent mixtures) to prepare a variety of functionalized biaryls and aryl alkynes in excellent yield.