Category: ruthenium-catalysts

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.246047-72-3, Name is (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium, molecular formula is C46H65Cl2N2PRu. In a Article£¬once mentioned of 246047-72-3, SDS of cas: 246047-72-3

Alkene metatheses in transition metal coordination spheres: Dimacrocyclizations that join trans positions of square-planar platinum complexes to give topologically novel diphosphine ligands

The alkene-containing phosphines PPh((CH2)nCH=CH 2)2)2 (4) are prepared from PPhH2, n-BuLi, and the corresponding bromoalkenes (1: 2 : 2), and combined with the platinum tetrahydrothiophene complex [Pt(mu-Cl)(C6F 5)(S(CH2CH2-)2)]2 (12) to give the square-planar adducts trans-(Cl)(C6F5) Pt(PPh((CH2)nCH=CH2)2)2 (11, 93-73%; n = a, 2; b, 3; c, 4; d, 5; e, 6; f, 8). Ring-closing metatheses with Grubbs’ catalyst (2) are studied. With 11e, two isomers of trans-(Cl)(C6F5)Pt(PPh(CH2) 14P(CH2)14Ph) (15e) are isolated after hydrogenation. Both form via dimacrocyclization between the trans-phosphine ligands, but differ in the dispositions of the PPh rings (syn, 31%; anti, 7%). The alternative intraligand metathesis product trans-(Cl)(C6F 5)Pt(PPh(CH2)14)2 (16e) is independently prepared by (i) protecting 4e as a borane adduct, H 3B¡¤PPh((CH2)6CH=CH2) 2, (ii) cyclization with 2 and hydrogenation to give H 3B¡¤PPh(CH2)14, (iii) deprotection and reaction with 12. The sample derived from lie contains ?2% 16e; mass spectra suggest that the other products are dimers or oligomers. The structures of syn-15e, anti-15e and 16e are verified crystallographically, and the macrocycle conformations analyzed. As expected from the (CH2)n segment length, 11a undergoes intraligand metathesis to give (Z,Z)-trans-(Cl)(C6F5)Pt(PPh(CH2) 2CH=CH(CH2)2)2 (86%), as confirmed by a crystal structure of the hydrogenation product. Although lib does not yield tractable products, 11c gives syn-(E,E)-trans-(Cl)(C6F 5)Pt(PPh(CH2)4CH=CH(CH2) 4P(CH2)4CH=CH(CH2)4Ph) (21%). This structure, and that of the hydrogenation product (syn-15c; 95%), are verified crystallographically. Analogous sequences with 11d,f give syn-15d,f (5 and 14% overall).

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Synthetic Route of 114615-82-6, An article , which mentions 114615-82-6, molecular formula is C12H28NO4Ru. The compound – Tetrapropylammonium perruthenate played an important role in people’s production and life.

Bisphosphonate squalene synthetase inhibitors and method

Compounds which are inhibitors of cholesterol biosynthesis (by inhibiting de novo squalene biosynthesis), and thus are useful as hypocholesterolemic agents and antiatherosclerotic agents are provided which have the structure STR1 and analogs thereof, wherein R1, R2, R3 and R4 are the same or different and are H, lower alkyl, a metal ion or a prodrug ester; R5 is H, halogen or lower alkyl; Zq is substituted alkenyl, substituted alkynyl, mixed alkenyl-alkynyl or substituted phenylalkyl or, phenylalkenyl or phenylalkynyl, or alkyl, including all stereoisomers thereof. New methods for using such compounds to inhibit cholesterol biosynthesis are also provided.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Related Products of 10049-08-8. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 10049-08-8, Name is Ruthenium(III) chloride. In a document type is Article, introducing its new discovery.

Preparation and Structure of Tetraphenylphosphonium Aquatetrachlorothionitrosylruthenate,

The preparation and structural characterization of are reported.Reaction of S3N3Cl3 with ruthenium trichloride yielded a brown crude product .The salt was prepared by the addition of PPh4Cl to an aqueous solution of followed by recrystallization of the brown precipitate from water-methanol (1:1).The crystals are triclinic, space group <*>, with unit-cell dimensions a = 10.173(5), b = 11.756(4), c = 12.793(10) Angstroem, alpha = 66.24(6), beta = 78.89(6), gamma = 72.58(4) deg, and Z = 2 (110 +/- 2K).The – anion forms an octahedron with H2O trans to the thionitrosyl group.The Ru-N-S group is approximately linear <170.9(3) deg> with Ru-N and N-S bond distances of 1.729(4) and 1.504(4) Angstroem, respectively.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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Differential effect of wortmannolone derivatives on MDA-MB-231 breast cancer cells

Background/Aim: The survival rate of women diagnosed with triple-negative breast-cancer (TNBC) remains low. Hence, this study aimed at the chemical and biological optimization of furanosteroid derivatives for the treatment of this type of malignancy using TNBC cells. Materials and Methods: Semi-synthetic analogs of wortmannolone (1-6) that negatively affected the aberrant pathways in tumor cells were evaluated in hormoneindependent breast cancer cells using western blot and cellcycle analysis. Results: Wortmannolone derivatization generated NF-?B inhibitors as new lead structures for further development. Compound (3) was found to be the most significantly active lead. Conclusion: Structure-activity analysis in the present study showed that acetylation of the hydroxyl groups and substitution on C3 and C17 of wortmannolone enhanced biological activity. Alphasubstitution of the acetyl group in C3 on ring A (compound 3) resulted in ROS inducing effect; however, presence of an acetyl group in beta-position of C3 displayed the highest NF-?B p65 inhibitory activity (0.60 muM).

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

301224-40-8, Name is (1,3-Dimesitylimidazolidin-2-ylidene)(2-isopropoxybenzylidene)ruthenium(VI) chloride, molecular formula is C31H38Cl2N2ORu, belongs to ruthenium-catalysts compound, is a common compound. In a patnet, once mentioned the new application about 301224-40-8, Computed Properties of C31H38Cl2N2ORu

Microwave-assisted tandem cross metathesis intramolecular Aza-Michael reaction: An easy entry to cyclic beta-amino carbonyl derivatives

Hoveyda-Grubbs catalyst in combination with BF3¡¤OEt2 efficiently promotes tandem cross metathesis intramolecular aza-Michael reaction between enones and unsaturated carbamates resulting in the creation of beta-amino carbonyl units. The use of microwave irradiation dramatically accelerates the process, enhancing the synthetic utility of this methodology for the preparation of these types of derivatives. When enantiomerically enriched ?-branched amines were used as starting materials, the process was also very efficient, although with modest selectivity in the newly created stereocenter. The use of microwave irradiation led to an interesting effect, inverting the selectivity in the addition process. Copyright

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

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Aminocyclohexane derivatives as 5-HT receptor agonists

A class of substituted aminocyclohexane derivatives are selective agonists of 5-HT 1 -like receptors, being potent agonists of the human 5-HT 1D alpha receptor subtype while possessing at least a 10-fold selective affinity for the 5-HT 1D alpha receptor subtype relative to the 5-HT 1D beta subtype; they are therefore useful in the treatment and/or prevention of clinical conditions, in particular migraine and associated disorders, for which a subtype-selective agonist of 5-HT 1D receptors is indicated, while eliciting fewer side-effects, notably adverse cardiovascular events, than those associated with non-subtype-selective 5-HT 1D receptor agonists.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Electric Literature of 92361-49-4, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 92361-49-4, Name is Chloro(pentamethylcyclopentadienyl)bis(triphenylphosphine)ruthenium(II), molecular formula is C46H45ClP2Ru. In a Article£¬once mentioned of 92361-49-4

Pentamethylcyclopentadienyl ruthenium(II) complexes containing chiral diphosphines: Synthesis, characterisation and electrochemical behaviour. X-ray structure of (eta5-C5Me5)Ru{(S,S)-Ph 2PCH(CH3)CH(CH3)PPh;2}Cl

Some pentamethylcyclopentadienyl ruthenium(II) diphosphine chloride complexes have been prepared by ligand exchange starting with the parent triphenylphosphine derivatives and their reactivities compared with those of the corresponding cyclopentadienyl compounds. The pentamethyl ligand causes a greater extent of asymmetric induction when the (R)-prophos and (R)-phenphos ligands are used as well as a higher lability of the stereochemistry at the stereogenic ruthenium centre. A shift of about 200 mV in the oxidation potential is caused by the substitution at the penta-hapto ligand. The order of basicity of the diphosphine ligands was also evaluated and was found to be consistent with previous determinations. The crystal structure of (eta5-C5Me)Ru{(S,S)-chiraphos}C1 shows a coordination around the ruthenium atom similar to that found for the (eta5-C5H5)Ru{(S,S)-chiraphos}Cl complex.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Synthetic Route of 37366-09-9, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer, molecular formula is C12H12Cl4Ru2. In a Article£¬once mentioned of 37366-09-9

Chiral, Porous, Hybrid Solids for Highly Enantioselective Heterogeneous Asymmetric Hydrogenation of beta-Keto Esters

Catalytic building blocks: Chiral porous zirconium phosphonates containing Rubinap moieties are synthesized by a molecular building-block approach, and characterized by a variety of techniques. These hybrid solids are used for enantioselective heterogeneous asymmetric hydrogenation of beta-keto esters with ee values of up to 95% (see picture). Ready tunability of such a molecular building-block approach promises to lead to useful heterogeneous asymmetric catalysts.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 10049-08-8, Name is Ruthenium(III) chloride, name: Ruthenium(III) chloride.

Interaction of ruthenium(III) chloride with bis(3,5-dimethylpyrazol-1-yl) methane oxyanions, potential kappa3 -N,N,O scorpionates

When RuCl3 was set to react with both bis(3,5-dimethylpyrazol-1- yl)acetate (bdmpza) and bis(3,5-dimethylpyrazol-1-yl)methane sulfonate (bdmpzsa) new ruthenium(II) complexes were obtained. The reduction of ruthenium(III) was studied by the NMR Evans method and spectrophotometrically, for 1:1 (Ru:L) molar ratios. Using the Evans method pseudo first-order constants of 2.5¡Á10-3 s-1 (bdmpzsa) and 3.9¡Á10 -3 s-1 (bdmpza) were obtained in DMSO-d6 (2% t-butanol) solutions. Spectrophotometrically the corresponding constants were also calculated: 1.1¡Á10-3 s-1 for bdmpzsa, and 1.6¡Á10-3 s-1, for bdmpza. Both ligands behave as kappa3-N,N,O scorpionates but with a weak oxyanionic coordination to the metal, susceptible to be substituted with NEt3 for a 1:1 molar ratio.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI

Application of 37366-09-9. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 37366-09-9, Name is Dichloro(benzene)ruthenium(II) dimer

Arene Ruthenium(II) Complexes as Low-Toxicity Inhibitor against the Proliferation, Migration, and Invasion of MDA-MB-231 Cells through Binding and Stabilizing c-myc G-Quadruplex DNA

Arene Ru(II) complexes have long been extensively studied as potential inhibitors against the proliferation of tumor cells, but their behavior against the migration and invasion of tumor cells needs further research. In this work, a series of arene Ru(II) complexes, (eta6-C6H6)Ru(p-XPIP)Cl]Cl (X = H, 1; F, 2; Cl, 3; Br, 4; and I, 5), have been synthesized, and their inhibitory activity against the migration and invasion of MDA-MB-231 breast cancer cells have been investigated. It is found that all of these complexes exhibit excellent inhibitory activity (IC50) against the growth of MDA-MB-231 breast cancer cells, and the value of IC50 for 1, 2, 3, 4, and 5 is about >300, 52.6, 11.4, 45.5, and 59.1 muM, respectively. Further studies by wound-healing assay, FITC-geltain assay, and flow cytometry assay showed that 3 can apparently suppress the migration and invasion of MDA-MB-231 cells via the joint action of S-phase arrest and apoptosis. Moreover, the binding behavior of these arene Ru(II) complexes with c-myc G-quadruplex DNA has also been studied, and the results showed that these complexes can bind and stabilize c-myc G-quadruplex DNA in groove binding mode. Also, the low toxicity of 3 was confirmed by its low inhibitory activity against the growth of normal MCF-10A breast cells in vitro and the development of zebrafish embryos in vivo. In other words, these results indicated that synthetic arene Ru(II) complexes can be developed as low-toxicity agents against the proliferation, migration, and invasion of breast cancer cells.

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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI