Tag: M.W:200-300

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. 4474-86-6, Name is N-Cbz-D-Asparagine, molecular formula is C12H14N2O5. In an article, author is Jahanshahi, Parivash,once mentioned of 4474-86-6, Recommanded Product: 4474-86-6.

Chemodivergent, multicomponent-tandem facile synthesis of novel 1H-pyrazolo[1,2-b]phthalazine-5,10-dione using acetic acid functionalized imidazolium salt {[cmdmim]I} as a recyclable catalyst

A novel one-pot four-component, highly efficient and environmentally benign approach for the synthesis of a wide range of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives in the presence of acetic acid functionalized imidazolium salt (1-carboxymethyl-2,3-dimethylimidazolium iodide {[cmdmim]I}) as a newly synthesized BrOnsted acid catalyst is described. The reaction occurs via tandem Knoevenagel-cyclocondensation of phthalic anhydride, hydrazine hydrate, aromatic aldehydes and 3-(1-methyl-1H-pyrrol-2-yl)-3-oxopropanenitrile (or 3-(1H-indol-3-yl)-3-oxopropanenitrile) in the presence of acetic acid functionalized imidazolium salt {[cmdmim]I} in ethanol under reflux conditions. This adequate procedure possesses some advantages like atom economy, cost-effectiveness, operational simplicity, short reaction times, straightforward work-up procedure, high yields, and reusability of the catalyst in 5 consecutive runs without any appreciable decrease in activity.

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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 2215-77-2, Name is 4-Phenoxybenzoic acid, molecular formula is C13H10O3, belongs to phthalazine compound. In a document, author is Szavuly, Miklos, introduce the new discover, SDS of cas: 2215-77-2.

Catalytic oxidation of alcohols and sulfides with hydrogen peroxide using isoindoline and phthalazine-based diiron complexes

A series of diiron(III) complexes of 1,3-bis(2′-arylimino)isoindoline, [(Fe(L)Cl)(2)O] and 1,4-di-(2′-aryl)aminophthalazine, [Fe-2(mu-OMe)(2)(H2L)Cl-4], including new structurally characterized ligands, 1,4-di-(4′-methyl-2′-thiazolyl)aminophthalazine and 1,4-di-(2′-benzthiazolyl)-aminophthalazine, have been characterized, and used as catalysts for the oxidation of para-substituted phenyl methyl sulfides and benzyl alcohols. Hammett correlations and kinetic isotope effect experiments support the involvement of electrophilic metal-based oxidants. In case of [(Fe(L-1,L-2)Cl)(2)O] catalysts, direct correlation has been found between the oxidative and catalase-like activity. (C) 2014 Elsevier B.V. All rights reserved.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law. In my other articles, you can also check out more blogs about 2215-77-2. SDS of cas: 2215-77-2.

Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 608141-42-0, Name is (S)-1-(3-Ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethanamine, SMILES is O=S(C[C@@H](N)C1=CC=C(OC)C(OCC)=C1)(C)=O, in an article , author is Goli-Jolodar, Omid, once mentioned of 608141-42-0, Application In Synthesis of (S)-1-(3-Ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethanamine.

Introduction of O-sulfonated poly(vinylpyrrolidonium) hydrogen sulfate as an efficient, and reusable solid acid catalyst for some solvent-free multicomponent reactions

In this work, O-sulfonated poly(vinylpyrrolidonium) hydrogen sulfate ([PVP-SO3H]HSO4) has been prepared as a powerful recyclable solid acid catalyst and characterized using a variety of techniques including elemental analysis, FT-IR, TGA, SEM, XRD, pH analysis and Hammett acidity function. After preparation and identification the mentioned solid acid with wide acidic functional group sites, is utilized as a highly efficient catalyst for the synthesis of tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-ones, 1-(benzothiazolylamino)phenylmethyl-2-naphthols and 2H-indazolo[2,1-b] phthalazine-1,6,11(13H)-triones in the absence of solvent. These eco-friendly protocols offer some advantages such as green and cost-effective procedures with excellent yields, shorter reaction times, simpler work-up, recovery, and reusability of a metal-free solid acid heterogeneous catalyst.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 608141-42-0, you can contact me at any time and look forward to more communication. Application In Synthesis of (S)-1-(3-Ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethanamine.

Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Majoumo-Mbe, Felicite, once mentioned the application of 108-36-1, Name is 1,3-Dibromobenzene, molecular formula is C6H4Br2, molecular weight is 235.904, MDL number is MFCD00000078, category is phthalazine. Now introduce a scientific discovery about this category, HPLC of Formula: C6H4Br2.

Synthesis, molecular and crystal structure of 1-(1,2-dihydrophthalazin-1-ylidene)-2-[1 -(thiophen-2-yl)ethylidene]hydrazine

The title compound, C14H12N4S, was synthesized by the condensation reaction of hydralazine and 2-acetylthiophene and during the reaction, a proton transfer from the imino nitrogen atom to one of the endocylic nitrogen atoms occurred. The compound crystallizes in the monoclinic crystal system with two independent molecules (molecules 1 and 2) in the asymmetric unit. In each molecule, there is a slight difference in the orientation of the thiophene ring with respect to phthalazine ring system, molecule 1 showing a dihedral angle of 42.51 (1)degrees compared to 8.48 (1)degrees in molecule 2. This implies an r.m.s deviation of 0.428 (1) angstrom between the two molecules for the 19 non-H atoms. The two independent molecules are connected via two N-H center dot center dot center dot N hydrogen bonds, forming dimers which interact by two bifurcated pi-pi stacking interactions to build tetrameric motifs. The latter are packed in the ac plane via weak C-H center dot center dot center dot pi interactions and along the b axis via C-H center dot center dot center dot N and C-H center dot center dot center dot pi interactions. This results a three-dimensional architecture with a tilted herringbone packing mode.

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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Chemistry, like all the natural sciences, begins with the direct observation of nature— in this case, of matter.4271-30-1, Name is (S)-2-(4-Aminobenzamido)pentanedioic acid, SMILES is O=C(O)[C@@H](NC(C1=CC=C(N)C=C1)=O)CCC(O)=O, belongs to phthalazine compound. In a document, author is Mori, Massiel, introduce the new discover, Recommanded Product: 4271-30-1.

Vaporization, Sublimation Enthalpy, and Crystal Structures of Imidazo[1,2-a]pyrazine and Phthalazine

The vaporization enthalpy of imidazo[1,2-a]pyrazine is evaluated by correlation gas chromatography using two sets of standards and by transpiration. Vaporization enthalpies were evaluated using heterocyclic standards with dipole moments that vary from 0 to 3.0 D and using standards with dipole moments > 3.0 D. A value of (70.7 +/- 1.0) kJ.mol-1 measured by transpiration compares to (67.9 +/- 1.4) kJ.mol1 measured by correlation gas chromatography using standards characterized by dipole moments > 3.0 D. The results suggest that imidazo[1,2-a]pyrazine is a member of this series of compounds whose vaporization enthalpies exceed those less polar heterocycles by a fairly constant amount, (6.9 +/- 0.3) kJ.mol-1, in this case by (5.9 +/- 3.0) kJ.mol(-1) using the less polar heterocycles. The crystal structures of phthalazine, another member of the polar series, and of imidazo[1,2-a]pyrazine were determined to examine whether p-p stacking, present in the solid state of two other members of the polar series, was a characteristic of this series. If present in the liquid, p-p stacking could offer a possible explanation for the vaporization enthalpy differences observed. The sublimation enthalpy of imidazo[1,2-a]pyrazine was also evaluated.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 4271-30-1. Recommanded Product: 4271-30-1.

Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Reference of 117-34-0, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 117-34-0, Name is 2,2-Diphenylacetic acid, SMILES is O=C(O)C(C1=CC=CC=C1)C2=CC=CC=C2, belongs to phthalazine compound. In a article, author is Shyma, P. C., introduce new discover of the category.

Regioselective one pot synthesis of 1,2,3-triazole derivatives bearing phthalazine moiety and their pharmacological activity

A new series of phthalazine-based 1,2,3-triazole derivatives (5a-h, 6a-f and 7a-d) were synthesized from the corresponding 2-(4-methyl/chloro benzyloxy) benzoic acid by multi-step reactions. Synthesized compounds were characterized by spectral studies and C, H, N analysis. The final compounds were screened for their antimicrobial, antifungal and antioxidant activity. Among them compounds 5c, 5g, 5h, 6b and 6e showed good antibacterial activity as compared to the standard drug streptomycin,whereas compounds 5g and 6d showed good antifungal activity comparable to the standard drug Fluconazole. Compounds 5a, 5f and 7c showed significant antioxidant property when compared with the standard butylated hydroxytoluene.

Reference of 117-34-0, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 117-34-0 is helpful to your research.

Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Related Products of 17852-52-7, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C–H bond functionalisation has revolutionised modern synthetic chemistry. 17852-52-7, Name is 4-Hydrazinylbenzenesulfonamide hydrochloride, SMILES is O=S(C1=CC=C(NN)C=C1)(N)=O.[H]Cl, belongs to phthalazine compound. In a article, author is Hosseininasab, N., introduce new discover of the category.

Preparation, Characterization, and First Catalytic Application of a Novel Phosphotungstic Acid-Containing Ionic Liquid Immobilized on CuFe2O4@SiO2 Magnetic Nanoparticles in the Synthesis of 1H-Pyrazolo[1,2-b]phthalazine-5,10-diones

A novel heterogeneous acidic ionic liquid based on functionalized imidazolium salt of phosphotungstic acid (H3PW12O40, denoted as PW), immobilized on CuFe2O4@SiO2 magnetic nanoparticles, denoted as CuFe2O4@SiO2@C-3-Imid-C4SO3-PW, was prepared and characterized using FT-IR, SEM, EDX, and VSM techniques. High activity of the prepared material as a novel catalyst was evaluated in one-pot synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-diones by reaction of phthalhydrazide with an aromatic aldehyde and malononitrile under solvent-free conditions. The process gave high yields of the products over short reaction time. The catalyst was efficiently recovered by magnetic decantation and used repeatedly without significant loss of its activity.

Related Products of 17852-52-7, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 17852-52-7 is helpful to your research.

Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Reference of 23981-47-7, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 23981-47-7, Name is 2-(6-Methoxynaphthalen-2-yl)acetic acid, SMILES is O=C(O)CC1=CC=C2C=C(OC)C=CC2=C1, belongs to phthalazine compound. In a article, author is Asadi, Sorayya, introduce new discover of the category.

Simultaneous Determination of Sulfamethoxazole and Phthalazine by HPLC and Multivariate Calibration Methods

Two multivariate calibration methods are compared for the simultaneous chromatographic determination and separation of Sulfamethoxazole (SMX) and Phthalazine (PHZ) by High Performance Liquid Chromatography (HPLC). Multivariate calibration techniques such as Classical Least Squares (CLS) and Inverse Least Squares (ILS) were introduced into HPLC to determine the quantification by using UV detector at 235, 250, 260 and 270 nm. Sixteen binary mixtures of SMX and PHZ as calibration set and eight binary mixtures as prediction set were used. Results show that, Relative Errors of Prediction (REP) of CLS and ILS for SMX and PHZ were 0.17%, 0.63% and 0.15%, 0.56%, respectively.

Reference of 23981-47-7, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 23981-47-7 is helpful to your research.

Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. Category: phthalazines, 83-53-4, Name is 1,4-Dibromonaphthalene, SMILES is C1=CC=CC2=C(C=CC(=C12)Br)Br, in an article , author is Chalaki, Samaneh B., once mentioned of 83-53-4.

Cu-II Anchored onto the Magnetic Talc: A New Magnetic Nanostructured Catalyst for the One-Pot Gram-Scale Synthesis of 1H-Pyrazolo[1,2-b]phthalazine-5,10-dione Derivatives

In the present study Cu(II)anchored onto the magnetic talc (gamma-Fe2O3/ talc /Cu(II)NPs) was successfully synthesized and characterized by FT-IR, XRD, TEM, FE-SEM, EDX, VSM, and ICP-OES techniques. Structural characterizations reveal that the gamma-Fe2O3/talc/Cu(II)NPs are superparamagnetic in nature, structured as a composite with average diameter of about 19-31 nm. The prepared nanostructured catalyst efficiently catalyzed the preparation of 1H-pyrazolo[1,2-b] phthalazine-5,10-diones at the gram scale without the use of the toxic organic solvents. The magnetically separable and environmentally friendly nanostructured catalyst remains quite stable during reaction conditions and reused for at least five recycle runs.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 83-53-4, you can contact me at any time and look forward to more communication. Category: phthalazines.

Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 24650-42-8, Name is 2,2-Dimethoxy-2-phenylacetophenone, molecular formula is C16H16O3. In an article, author is Fegade, Umesh,once mentioned of 24650-42-8, Recommanded Product: 2,2-Dimethoxy-2-phenylacetophenone.

A novel chromogenic and fluorogenic chemosensor for detection of trace water in methanol

A novel receptor (E)-1-(phthalazine-4-yl)-2-(1-(pyridine-2-yl) ethylidene) hydrazine (3) was developed for the detection of trace water content present in methanol. Upon interaction of water molecule with receptor 3, there appears a significant color change from colorless to yellow green and the absorption band at 355 nm was shifted to 435 nm (i.e. bathochromic or red shift) due to selective encapsulation of water molecule at 1-(pthalazine-4-yl) hydrazine-NH and imine groups leading to tautomeric transformation in the ground state which is caused by an intramolecular proton transfer. Also, there was remarkable enhancement in fluorescence intensity of 3 in methanol upon addition of water. Thus the chemosensor 3 has been developed for chromogenic and fluorogenic investigation of water and the detection limit is 5 ppm in methanol. (C) 2015 Elsevier B.V. All rights reserved.

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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem