Tag: M.W:200-300

An article , which mentions Product Details of 538-58-9, molecular formula is C17H14O. The compound – 1,5-Diphenylpenta-1,4-dien-3-one played an important role in people’s production and life., Product Details of 538-58-9

Gem-Dimethyl-cyclo-propanation of dibenzyl-ideneacetone using triisopropyl sulfoxonium tetra-fluoro-borate

The reaction between dibenzyl-ideneacetone (dba) and tri-isopropyl sulfoxonium tetra-fluoro-borate has been reinvestigated. The stereochemistry of the major diasteromeric bis-(gem-dimethyl-cyclo-propane) adduct has now been assigned as [(1RS,3RS)-2,2-dimethyl-3-phenyl-cyclo-prop-yl][(1SR,3SR)-2,2- dimethyl-3-phenyl-cyclo-prop-yl]methanone, C23H26O, by X-ray crystallographic studies on a twinned crystal. The asymmetric unit contains two ml-ecules of the adduct, the conformations of which differ in the orientation of the phenyl ring relative to the adjacent cyclo-propanated double bond. The carbonyl groups of each adduct are aligned approximately along the a axis and in opposite directions to each other. The mol-ecules pack to give a sinusoidal pattern along the b axis. This is the first acyclic bis-(dimethyl-cyclo-prop-yl) ketone for which an X-ray crystal structure determination has been reported, and is also the first bis-cyclo-propanated dba analogue. The knowledge that the major diastereomer has the meso structure (and therefore the confirmation that the minor isomer is the racemate) will prove invaluable in future studies to utilize bis-(dimethyl-cyclo-prop-yl) ketones as reagents, in rearrangement processes, and as potential ligands and ligand precursors in organometallic chemistry.

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Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Electric Literature of 538-58-9, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. Electric Literature of 538-58-9, C17H14O. A document type is Article, introducing its new discovery.

Chemoselective transfer hydrogenation of alpha,beta-unsaturated carbonyls using palladium immobilized ionic liquid catalyst

This work reports a simple and highly efficient protocol for chemoselective transfer hydrogenation of alpha,beta-unsaturated carbonyls using immobilized palladium metal-containing ionic liquid as a versatile heterogeneous catalyst with an excellent conversion and chemoselectivity (up to 100 %). The influence of various reaction parameters such as the effect of hydrogen donor, solvent, temperature, and time were studied. The catalyst was recycled for four consecutive cycles without significant loss in the catalytic activity. The developed protocol is more advantageous due to the use of HCOONH4 as a hydrogen source, mild reaction conditions, and simple workup procedure and applicable for a wide range of substrates.

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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. name: 1,5-Diphenylpenta-1,4-dien-3-one, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 538-58-9, name is 1,5-Diphenylpenta-1,4-dien-3-one. In an article£¬Which mentioned a new discovery about 538-58-9

Solvent-free and efficient synthesis of highly functionalized cyclohexa-1,3-diene derivatives via a novel one-pot three-component reaction

A catalyst-free and convenient approach for the preparation of cyclohexa-1,3-dienecarboxylate derivatives is described. This three-component reaction between primary amines, alkyl acetoacetate, and dibenzylideneacetone proceeds under solvent-free condition in good to excellent yields. Georg Thieme Verlag Stuttgart.

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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Related Products of 538-58-9, 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. 538-58-9, Name is 1,5-Diphenylpenta-1,4-dien-3-one, molecular formula is C17H14O. In a Article£¬once mentioned of 538-58-9

Synthesis, spectral, crystal and antimicrobial studies of biologically potent oxime ethers of nitrogen, oxygen and sulfur heterocycles

Three series of oxime ethers viz, 2,6-diarylpiperidin-4-one O-benzyloximes 5a-o, 2,6-diaryltetrahydropyran-4-one O-benzyloximes 7a-e and 2,6-diaryltetrahydrothiopyran-4-one O-benzyloximes 11a-b and 12a-c were synthesized and stereochemistry is established by their spectral and single crystal analysis. A SAR study has been carried out for the above oxime ethers against a panel of antibacterial (Pseudomonas aeruginosa, Staphylococcus aureus, Salmonella typhi and Escherichia coli) and antifungal agents (Candida albicans, Candida-51, Rhizopus sp., Aspergillus niger, Aspergillus flavus and Cryptococcus neoformans), respectively, using Ciprofloxacin and Amphotericin B as standards. Most of the chloro/methyl/methoxy substituted compounds exerted moderate to good activity against all the tested organisms; moreover, some compounds (5i, 5l, 5n, 5o, 7c2, 7d1, 7d2, 7e, 11b and 12c) exhibited promising activity than standard drugs.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Related Products of 538-58-9. In my other articles, you can also check out more blogs about Related Products of 538-58-9

Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Application of 538-58-9, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 538-58-9, 1,5-Diphenylpenta-1,4-dien-3-one, introducing its new discovery.

Anti-neoplastic activity of 1,3-diaza-2-functionalized-adamantan-6-one compounds against melanoma cells

Four series of 1,3-diaza-2-functionalized-adamantan-6-one derivatives, bearing at the 2 position SO, SO2, POCl and PO2H functional groups, were synthesized via a key quadruple Mannich reaction, followed by transformation of an aminal functionality into the final 2-thia- and 2-phospha compounds. The compounds were tested for cytotoxic activity against the mouse B16-F10 melanoma cell line. Malignant melanoma is notorious for its high resistance to chemotherapy, and new anti-melanoma drugs are urgently needed. The 2-thia compounds exhibited poor proliferation inhibition activity, but the 2-phospha derivatives showed significant activity, with IC50 values of 10-60 M. The compounds induced cell death by G2/M cell cycle arrest, which led to apoptosis, as determined by Annexin V-FITC/PI staining, mitochondrial membrane potential changes assessed by the JC-1 reagent, caspases 3 and 7 activation, and morphological changes.

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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Synthetic Route of 538-58-9, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 538-58-9, molcular formula is C17H14O, introducing its new discovery.

Palladium-Catalyzed Conjugate Addition Type Reaction of Aryl Iodides with alpha,beta-Unsaturated Ketones

Aryl iodides have been found to react with alpha,beta-unsaturated ketones in the presence of catalytic amounts of palladium, an excess of formic acid, and triethylamine, giving rise to conjugate addition type products.The electron-withdrawing power of the group attached to the olefinic double bond, the substituent beta to the carbonyl group, and the basic reaction medium appear to effect greatly the conjugate addition/vinylic substitution ratio.

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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Electric Literature of 538-58-9, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.538-58-9, Name is 1,5-Diphenylpenta-1,4-dien-3-one, molecular formula is C17H14O. In a Patent£¬once mentioned of 538-58-9

A high-purity (dibenzylidene acetone) two palladium (0) of the preparation method (by machine translation)

The invention discloses a high-purity (dibenzylidene acetone) two palladium (0) of the preparation method, the method comprises: a, under the nitrogen atmosphere, the ligand dibenzylidene acetone, two palladium chloride and anhydrous sodium acetate into a mixing state in anhydrous ethanol heating reaction, obtained after filtering the solid double-(dibenzylidene acetone) palladium (0); b, under the nitrogen atmosphere, obtained in the step a solid double-(dibenzylidene acetone) palladium (0) into a mixing state of acetone in the reaction, washing of objects after being filtered, washed and removing of drying, to obtain three (dibenzylidene acetone) two palladium (0). The invention uses absolute ethanol, dibenzylidene acetone, two palladium chloride and anhydrous sodium acetate first preparing double-(dibenzylidene acetone) palladium (0), then the acetone solution processing to obtain three (dibenzylidene acetone) two palladium (0), the prepared three (dibenzylidene acetone) two palladium (0) of relatively high purity. (by machine translation)

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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Synthetic Route of 538-58-9, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. Synthetic Route of 538-58-9, C17H14O. A document type is Article, introducing its new discovery.

Kinetic Resolution of beta-Hydroxy Carbonyl Compounds via Enantioselective Dehydration Using a Cation-Binding Catalyst: Facile Access to Enantiopure Chiral Aldols

A practical and highly enantioselective nonenzymatic kinetic resolution of racemic beta-hydroxy carbonyl (aldol) compounds through enantioselective dehydration process was developed using a cation-binding Song’s oligoethylene glycol (oligoEG) catalyst with potassium fluoride (KF) as base. A wide range of racemic aldols was resolved with extremely high selectivity factors (s = up to 2393) under mild reaction conditions. This protocol is easily scalable. It provides an alternative approach for the syntheses of diverse biologically and pharmaceutically relevant chiral aldols in enantiomerically pure form. For example, racemic gingerols could participate in this kinetic resolution with superb efficiency (s > 240), affording both enantiomerically pure gingerols and corresponding shogaols simultaneously in a single step. The dramatic effectiveness of such kinetic resolution process can be ascribed to systematic cooperative hydrogen-bonding catalysis in a densely confined supramolecular chiral cage in situ generated from the chiral catalyst, substrate, and KF.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Synthetic Route of 538-58-9, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 538-58-9, in my other articles.

Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Related Products of 538-58-9, 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. 538-58-9, Name is 1,5-Diphenylpenta-1,4-dien-3-one, molecular formula is C17H14O. In a Article£¬once mentioned of 538-58-9

Sustainable conjugate addition of indoles catalyzed by acidic ionic liquid immobilized on silica

A new protocol for 1,4-conjugate addition of indoles to vinyl ketones has been developed, employing Lewis acidic ionic liquid immobilized on silica, ILIS-SO2Cl, as a catalyst, which exhibited an efficient, mild and recyclable nature. The reaction condition is applicable to various vinyl ketones and indoles. The mild nature of the reaction condition showed that the acetoxy or TBDMS group in indoles was maintained intact. The catalyst was used six times resulting in 86% average yield. Georg Thieme Verlag Stuttgart.

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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Application of 538-58-9, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.538-58-9, Name is 1,5-Diphenylpenta-1,4-dien-3-one, molecular formula is C17H14O. In a article£¬once mentioned of 538-58-9

One-Pot Catalytic Enantioselective Synthesis of 2-Pyrazolines

A scalable, one-pot, enantioselective catalytic synthesis of 2-pyrazolines from beta-substituted enones and hydrazines is described. Pivoting on a two-stage catalytic Michael addition/condensation strategy, the use of an aldehyde to generate a suitable hydrazone derivative of the hydrazine was found to be key for curtailing background reactivity and tuning the catalyst-controlled enantioselectivity. The new synthetic method is easy to perform, uses a new and readily prepared cinchona-derived bifunctional catalyst, is broad in scope, and tolerates a range of functionalities with high enantioselectivity (up to >99:1 e.r.). The significant scalability of this methodology was demonstrated with the synthesis of more than 80 grams of a pyrazoline product with 89 % catalyst recovery.

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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate