Category: 246047-72-3

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Multifunctional dithiocarbamates: Synthesis and ring-closing metathesis of diallyldithiocarbamate complexes

The complex cis-[RuCl2(dppm)2] reacts with the diallyldithiocarbamate KS2CN(CH2CH=CH2) 2 to form [Ru{S2CN(CH2CH=CH2) 2}(dppm)2]+. The same ligand was also used to prepare the alkenyl complexes [RuR{S2CN(CH2CH=CH 2)2}(CO)(PPh3)2] (R = CH=CHBu t, CH=CHC6H4Me-4, C(C?CBu t)=CHBut) from the corresponding precursors [RuRCl(CO)(BTD)(PPh3)2] (BTD = 2,1,3-benzothiadiazole) and [Ru(C(C?CBut)=CHBut)Cl(CO)(PPh3) 2]. The complexes [Ni{S2CN(CH2CH=CH 2)2}(dppp)]+ (dppp =1,3-bis(diphenylphosphino) propane) and [M{S2CN(CH2CH=CH2) 2}(dppf)]+ (M = Ni, Pd, Pt; dppf = 1,1?- bis(diphenylphosphino)ferrocene) were prepared from the respective precursors [MCl2(L2)] (L2 = dppp, dppf) and KS 2CN(CH2CH=CH2)2 in the presence of NH4PF6. In a similar manner, treatment of the cyclometalated dimer [Pd(C,N-CH2C6H4NMe 2)Cl]2 with the dithiocarbamate ligand yielded [Pd(C,N-CH2C6H4NMe2){S 2CN(CH2CH=CH2)2}]. The homoleptic literature complexes [Ni{S2CN(CH2CH=CH2) 2}2] and [Co{S2CN(CH2CH=CH 2)2}3] were also prepared and characterized. Ring-closing metathesis catalyzed by [Ru(=CHPh)Cl2(SIMes)(PCy 3)] converted [Ni{S2CN(CH2CH=CH 2)2}2], [Pd(C,N-CH2C 6H4NMe2){S2CN(CH2CH= CH2)2}], [Ni{S2CN(CH2CH=CH 2)2}(dppp)]+, [Pt{S2CN(CH 2CH=CH2)2}(dppf)]+, [Ru{S 2CN(CH2CH=CH2)2}(dppm) 2]+, and [Ru(CH=CHC6H4Me-4){S 2CN(CH2CH=CH2)2}(CO)(PPh 3)2] into the corresponding 3-pyrroline dithiocarbamate compounds [Ni(S2CNC4H6)2], [Pd(C,N-CH2C6H4NMe2)(S 2CNC4H6)], [Ni(S2CNC 4H6)(dppp)]+, [Pt(S2CNC 4H6)(dppf)]+, [Ru(S2CNC 4H6)(dppm)2]+, and [Ru(CH=CHC 6H4Me-4)(S2CNC4H6)(CO) (PPh3)2], respectively. These complexes were also directly prepared from the reaction of the appropriate starting materials with preformed KS2CNC4H6. The more sterically crowded complex [Co{S2CN(CH2CH=CH2)2}3] failed to give a reaction with the metathesis catalyst, although it could be prepared directly from KS2CNC4H6 and cobalt acetate. The compounds [Ru(CH=CHC6H4Me-4){S 2CN(CH2CH=CH2)2}(CO)(PPh 3)2], [Ni{S2CN(CH2CH=CH 2)2}(dppp)]PF6, and [Ni(S2CNC 4H6)(dppp)]PF6 were characterized crystallographically.

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

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Asymmetric sulfur ylide based enantioselective synthesis of D-erythro-sphingosine

An asymmetric sulfur ylide reaction was employed to prepare an epoxide intermediate in a convergent manner. This epoxide was efficiently transformed into D-erythro-sphingosine.

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

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Total synthesis of (+)-chloriolide

The first total synthesis of (+)-chloriolide, a 12-membered macrolide from Chloridium virescens (var. chlamydosporum), was accomplished in a longest linear sequence of 20 steps from commercial materials in 7% overall yield. The Royal Society of Chemistry.

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

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METHOD FOR PRODUCING OLEFIN

A method for producing at least one olefin compound selected from the group consisting of a compound of formula (51), a compound of formula (52), a compound of formula (53), and a compound of formula (54), the method including reacting an olefin compound of formula (21) with a olefin compound of formula (31) in the presence of at least one metal catalyst selected from the group consisting of a compound of formula (11), a compound of formula (12), a compound of formula (13), a compound of formula (14), and a compound of formula (15).

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

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N-Heterocyclic carbene-based ruthenium-hydride catalysts for the synthesis of unsymmetrically functionalized double-decker silsesquioxanes

Ruthenium-N-heterocyclic carbene complexes with the generic formula [RuHCl(CO)(NHC)(PCy3)] exhibit a high catalytic activity toward the (E)-selective silylative coupling of divinyl-substituted double-decker silsesquioxanes with two distinctly substituted styrenes. This process leads to a novel class of unsymmetrically functionalized silsesquioxane derivatives.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Computed Properties of C46H65Cl2N2PRu. In my other articles, you can also check out more blogs about 246047-72-3

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

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 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, HPLC of Formula: C46H65Cl2N2PRu

Highly Selective Ring Expansion of Bicyclo[3.1.0]hexenes

A Ru-carbene-promoted ring expansion of bicyclo[3.1.0]hexenes with terminal alkynes is reported. The reaction delivers seven-membered carbocycles starting from readily available starting materials and was found to be highly regioselective. The resulting seven-membered ring products contain both conjugated diene and cyclopropane substructures that could be selectively reacted in subsequent transformations.

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

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Preparation of alkenyl cyclopropanes through a ruthenium-catalyzed tandem enyne metathesis-cyclopropanation sequence

Acyclic enynes undergo a tandem enyne metathesis/cyclopropanation sequence in the presence of Grubbs’ 1st generation metathesis catalyst and diazo compounds. In practice, the acyclic substrates in the presence of the ruthenium alkylidene first undergo a ring-closing enyne metathesis to generate cyclic 1,3-dienes; then upon addition of a diazo compound, these products are cyclopropanated selectively at the more accessible olefin. Overall, the reaction sequence converts acyclic enynes into vinyl cyclopropanes in single operation through two unique ruthenium-catalyzed transformations. Copyright

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Reference£º
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 246047-72-3, Name is (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium, Safety of (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium.

Reactivity of methacrylates in insertion polymerization

Polymerization of ethylene by complexes [{(P?O)PdMe(L)}] (P?O = kappa2-(P,O)-2-(2-MeOC6H4)2PC 6H4SO3)) affords homopolyethylene free of any methyl methacrylate (MMA)-derived units, even in the presence of substantial concentrations of MMA. In stoichiometric studies, reactive {(P?O)Pd(Me)L} fragments generated by halide abstraction from [({(P?O)Pd(Me)Cl}mu-Na) 2] insert MMA in a 1,2- as well as 2,1-mode. The 1,2-insertion product forms a stable five-membered chelate by coordination of the carbonyl group. Thermodynamic parameters for MMA insertion are DeltaH ? = 69.0(3.1) kJ mol-1 and DeltaS ? = -103(10) J mol-1 K-1 (total average for 1,2- and 2,1-insertion), in comparison to DeltaH? = 48.5(3.0) kJ mol-1 and DeltaS? = -138(7) J mol-1 K-1 for methyl acrylate (MA) insertion. These data agree with an observed at least 102-fold preference for MA incorporation vs MMA incorporation (not detected) under polymerization conditions. Copolymerization of ethylene with a bifunctional acrylate-methacrylate monomer yields linear polyethylenes with intact methacrylate substituents. Post-polymerization modification of the latter was exemplified by free-radical thiol addition and by cross-metathesis.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Safety of (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium. In my other articles, you can also check out more blogs about 246047-72-3

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

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, Recommanded Product: (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium

Synthesis of elaiolide and halichoblelide aglycone

A synthesis of two structurally related macrodiolides representing the aglycone of natural products elaiophylin and halichoblelide is described. The key transformation for both is a Ti(II)-mediated (silyloxy)enyne cyclization, generating a new methyl stereocenter and providing a diene that can be selectively cross metathesized with crotonic acid.

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

Synthetic Route of 246047-72-3, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 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

Asymmetric total syntheses of xanthatin and 11,13-dihydroxanthatin using a stereocontrolled conjugate allylation to gamma-butenolide

The stereocontrolled conjugate allylation to an optically pure gamma-butenolide provided direct and reliable access to a trans-fused series of xanthanolide sesquiterpenoids and allowed for the enantioselective total syntheses of xanthatin and 11,13-dihydroxanthatin to be efficiently achieved.

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