Category: 92390-26-6

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Ruthenium-Catalyzed [2 + 2] Cycloadditions between 7-Substituted Norbornadienes and Alkynes: An Experimental and Theoretical Study, published in 2004-11-26, which mentions a compound: 92390-26-6, mainly applied to ruthenium catalysis cycloaddition norbornadiene alkyne experiment theor, Quality Control of Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium.

The ruthenium-catalyzed [2 + 2] cycloadditions of 7-substituted norbornadienes with an alkyne have been investigated. The cycloadditions were found to be highly regio- and stereoselective, giving only the anti-exo cycloadducts as the single regio- and stereoisomers in good yields. The results on the relative rate of different 7-substituted norbornadienes in the Ru-catalyzed [2 + 2] cycloadditions with an alkyne indicated that the reactivity of the alkene component decreases dramatically as the alkene becomes more electron deficient. Ab initio computational studies on the ruthenium-catalyzed [2 + 2] cycloadditions provided important information about the geometries and the arrangements of the four different groups on the Ru in the initial Ru-alkene-alkyne π-complex, 14, and in the metallacyclopentene 15. Based on our computational studies, we also found that the first carbon-carbon bond formed in the [2 + 2] cycloaddition is between the C5 of the alkene and the Cb (the acetylenic carbon attached to the ester group) of the alkyne 8. Our computational studies on the potential energy profiles of the cycloadditions showed that the activation energy relative to the reactants for the oxidative addition step is in the range of 9.3-9.8 kcal/mol. The activation energy relative to the metallacyclopentene for the reductive elimination step is much higher than for the oxidative addition step (in the range of 25.9-27.6 kcal/mol).

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Safety of Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, is researched, Molecular C18H28ClRu, CAS is 92390-26-6, about Ruthenium-Catalyzed Cycloaddition of 1,6-Diynes with Isothiocyanates and Carbon Disulfide: First Transition-Metal Catalyzed [2 + 2 + 2] Cocyclotrimerization Involving C:S Double Bond. Author is Yamamoto, Yoshihiko; Takagishi, Hideyuki; Itoh, Kenji.

In the presence of 10 mol % Cp*Ru(cod)Cl, 1,6-diynes with a tertiary center at 4-position reacted with various isothiocyanates at their C:S double bond to afford bicyclic (2H)-thiopyranimines in 35-88% yields. The (2H)-thiopyran structure was unequivocally determined by X-ray anal. The cycloaddition of carbon disulfide with a diyne similarly gave the expected bicyclic dithiopyrone in 50% yield.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium( cas:92390-26-6 ) is researched.Synthetic Route of C18H28ClRu.Fagan, Paul J.; Mahoney, Wayne S.; Calabrese, Joseph C.; Williams, Ian D. published the article 《Structure and chemistry of the complex tetrakis(η5-pentamethylcyclopentadienyl)tetrakis(μ3-chloro)tetraruthenium(II): a useful precursor to (pentamethylcyclopentadienyl)ruthenium(0), -(II), and -(IV) complexes》 about this compound( cas:92390-26-6 ) in Organometallics. Keywords: crystal mol structure pentamethylcyclopentadienylruthenium chloride complex; ruthenium pentamethylcyclopentadienyl preparation reaction; diene ruthenium halide anion complex; butadieneruthenium iodide preparation crystal mol structure. Let’s learn more about this compound (cas:92390-26-6).

A single crystal x-ray structural anal. of the complex [Cp*Ru(μ3-Cl)]4 (I, Cp* = η5-pentamethylcyclopentadienyl) has been performed. The complex contains a distorted cubic array of Ru and Cl atoms. I is a useful precursor to Ru(0), Ru(II), and Ru(IV) pentamethylcyclopentadienyl complexes. Reaction of I with donor ligands yields Cp*RuL2Cl complexes (L = CO, PMe3). With dienes, I yields the complexes Cp*Ru(η4-diene)Cl (diene = 1,3-butadiene, 1,3-ptenadiene, trans-2,trans-4-hexadiene, 2,3-dimethyl-1,3-butadiene, 2,3-diphenyl-1,3-butadiene, 1,3-cyclohexadiene, 1,3-cycloheptadiene, 1,5-cyclooctadiene, norbornadiene) which in turn can be reduced with Li to yield the corresponding anionic diene complexes Cp*Ru(η4-diene)-Li+·DME (DME = 1,2-dimethoxyethane). The complex [Cp*Ru(μ3-I)]4 has also been prepared and reacts with 1,3-butadiene to yield Cp*Ru(η4-s-cis-1,3-butadiene)I, which has been structurally characterized by a single crystal x-ray anal. Reaction of I with ethylene yields the complex [Cp*Ru(η2-C2H4)Cl]x which can be converted to the complex Cp*Ru(η2-C2H4)2Li. With allyl chloride, I yields the oxidative addition product Cp*Ru(η2-C2H4)Cl2.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Recommanded Product: 92390-26-6. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, is researched, Molecular C18H28ClRu, CAS is 92390-26-6, about Addition of diazoalkanes to enynes promoted by a ruthenium catalyst: simple synthesis of alkenyl bicyclo[3.1.0]hexane derivatives. Author is Monnier, Florian; Castillo, Dante; Derien, Sylvie; Toupet, Loiec; Dixneuf, Pierre H..

[C*pRuCl(cod)] (C*p = C5Me5, cod = cyclooctadiene) promotes the reaction of 1,6-enynes with an excess of diazoalkane in dioxane in one step to afford selectively 1-alkenyl bicyclo[3.1.0]hexane derivatives (X = O, NTs; Y = CO2Et; R1 = H, Me; R2 = H; Ts = p-toluenesulfonyl). This novel reaction involves the stereoselective formation of three C-C bonds and a cyclopropanation step. Crystal structure of one of the products was also studied.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 92390-26-6, is researched, Molecular C18H28ClRu, about Ru(II)-Catalyzed Chemo- and Regioselective Cyclotrimerization of Three Unsymmetrical Alkynes through Boron Temporary Tether. One-Pot Four-Component Coupling via Cyclotrimerization/Suzuki-Miyaura Coupling, the main research direction is regioselective cyclotrimerization alkynylboronate propargyl alc terminal alkyne; biaryl preparation.Category: catalyst-palladium.

The Ru(II)-catalyzed [2+2+2] cyclotrimerization of alkynylboronates, propargyl alc., and terminal alkynes proceeded chemo- and regioselectively to give rise to arylboronates, which were subjected to Suzuki-Miyaura cross-coupling with aryliodides to afford highly substituted biaryls in 53-76% yields.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Application In Synthesis of Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, is researched, Molecular C18H28ClRu, CAS is 92390-26-6, about Ruthenium-Catalyzed [2+2] Cycloadditions of Alkynyl Sulfides and Alkynyl Sulfones. Author is Riddell, Nicole; Tam, William.

Ruthenium-catalyzed [2+2] cycloadditions of bicyclic alkenes with alkynyl sulfides and alkynyl sulfones were investigated. The sulfide and sulfone moieties were compatible with the Ru-catalyzed cycloadditions, giving the cyclobutene cycloadducts in good yields. The sulfonyl-containing cycloadducts can be transformed into a variety of products that are difficult to obtain via direct cycloaddition

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Name: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, is researched, Molecular C18H28ClRu, CAS is 92390-26-6, about Biscarbene-Ruthenium Complexes in Catalysis: Novel Stereoselective Synthesis of (1E,3E)-1,4-Disubstituted-1,3-dienes via Head-to-Head Coupling of Terminal Alkynes and Addition of Carboxylic Acids. Author is Le Paih, Jacques; Monnier, Florian; Derien, Sylvie; Dixneuf, Pierre H.; Clot, Eric; Eisenstein, Odile.

The reaction of a variety of alkynes RCCH with a variety of carboxylic acids R1CO2H, in the presence of 5% of RuCl(COD)C5Me5, selectively leads to the dienyl esters (1E,3E)-RCH1:CH2-CH3:C(R)(O2CR1). The reaction also applies to amino acid and dicarboxylic acid derivatives It is shown that the first step of the reaction consists of the head-to-head alkyne coupling and of the formation of the metallacyclic biscarbene-ruthenium complex cyclo-(C5Me5)(Cl)Ru:C(R)-CH:CH-C:(R), isolated for R = Ph and catalyzing the formation of dienyl ester. D-labeled reactions show that the alkyne protons remain at the alkyne terminal carbon atoms and carboxylic acid protonates the C1 carbon atom. QM/MM (ONIOM) calculations, supporting a mixed Fischer-Schrock-type biscarbene complex, show that protonation occurs preferentially at the carbene carbon C1 adjacent to Ru, in the relative cis position with respect to the Ru-Cl bond, to give a mixed C(1)alkyl-C(4)carbene complex in which the C4 carbene is conjugated with the noncoordinated C2:C3 double bond. This 16-electron intermediate has a weak stabilizing α agostic C-H bond. This most stable isomer appears to have a C4 center more accessible to the nucleophilic addition which accounts for the exptl. observed product.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Novel early-late transition metal complexes. The first thiolato bridged titanium-ruthenium complexes, published in 1997-01-31, which mentions a compound: 92390-26-6, Name is Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, Molecular C18H28ClRu, Recommanded Product: 92390-26-6.

Novel thiolato-bridged Ti-Ru mixed metal complexes, Cp2Ti(μ-SPh)2RuClCp* (1), Cp2Ti(μ-SPh)2RuHCp* and [Cp2Ti(μ-SPh)2Ru(L)Cp*][PF6] (L = MeCN, t-BuCN (3a); Cp* = C5Me5) were prepared The crystal structures of 1 and 3a were determined

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Novel early-late transition metal complexes. The first thiolato bridged titanium-ruthenium complexes, published in 1997-01-31, which mentions a compound: 92390-26-6, Name is Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, Molecular C18H28ClRu, Recommanded Product: 92390-26-6.

Novel thiolato-bridged Ti-Ru mixed metal complexes, Cp2Ti(μ-SPh)2RuClCp* (1), Cp2Ti(μ-SPh)2RuHCp* and [Cp2Ti(μ-SPh)2Ru(L)Cp*][PF6] (L = MeCN, t-BuCN (3a); Cp* = C5Me5) were prepared The crystal structures of 1 and 3a were determined

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 92390-26-6, is researched, Molecular C18H28ClRu, about Novel Synthesis of Benzenepolycarboxylates by Ruthenium-Catalyzed Cross-Benzannulation of Acetylenedicarboxylates with Allylic Compounds, the main research direction is benzene poly carboxylate preparation; ruthenium catalyzed benzannulation acetylenedicarboxylate allylic compound.SDS of cas: 92390-26-6.

A catalyst system consisting of Cp*RuCl(cod)/PPh3 [Cp* = pentamethylcyclopentadienyl, cod = 1,5-cyclooctadiene] for the novel cross-benzannulation of 2 equivalent of dialkyl acetylenedicarboxylate with an allylic compound has been developed. As an example, the reaction of di-Me acetylenedicarboxylate with allyl alc. in the presence of 4 mol % Cp*RuCl(cod) and PPh3 under reflux in toluene for 5 h gave tetra-Me 5-methyl-1,2,3,4-benzenetetracarboxylate in an isolated yield of 84%.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method