Category: 1698-53-9

1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, belongs to pyridazine compound, is a common compound. HPLC of Formula: C10H6Cl2N2OIn an article, once mentioned the new application about 1698-53-9.

The present invention provides compounds with imaging moieties for imaging a subject. The present invention also relates to systems, compositions, and methods for the synthesis and use of imaging agents, or precursors thereof. An imaging agent precursor may be converted to an imaging agent using the methods described herein. In some cases, a composition or plurality of imaging agents is enriched in 18 F. In some cases, an imaging agent may be used to image an area of interest in a subject, including, but not limited to, the heart, cardiovascular system, cardiac vessels, brain, and other organs.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N3075 – PubChem

 

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Product Details of 1698-53-9, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1698-53-9, name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one. In an article，Which mentioned a new discovery about 1698-53-9

A convenient and versatile synthetic approach to substituted 1,3-oxazolo[4,5-d]pyridazinones is developed. The oxazole ring was formed upon reaction of 5-amino-4-hydroxy-3(2H)-pyridazinone with various carboxylic acid derivatives using a microwave-assisted procedure, which favors the reaction time and purity of the resulting products. The developed methodology is suitable for rapid, parallel, automated synthesis of oxazolopyridazinone libraries.

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Pyridazine – Wikipedia,
Pyridazine | C4H4N3096 – PubChem

 

Application of 1698-53-9, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, molecular formula is C10H6Cl2N2O. In a Article，once mentioned of 1698-53-9

A novel ring contraction for the conversion of 2,7-disubstituted 10H-dipyridazino<4,5-b:4',5'-e><1,4>thiazine-1,6-(2H,7H)-diones (4’a-c) into the corresponding 2,6-disubstituted 9H-dipyridazino<4,5-b:4',5'-d>pyrrole-1,5(2H,6H)-diones (7’a-c), through a base-induced extrusion of sulfur, is described.Heating of 4’a-c in dimethylformamide in the presence of potassium carbonate smoothly afforded 7’a-c, respectively, in good yields, although neither 2,8-dimethyl-10H-dipyridazino<4,5-b:4',5'-e><1,4>thiazine-1,9(2H,8H)-dione (5’a), nor 3,7-dimethyl-10H-dipyridazino<4,5-b:4'5'-e><1,4>thiazine-4,6(3H,7H)-dione (6’a) was susceptible to similar reaction conditions.The mechanism of the ring contraction, which may involve an intermediate (anion, C-) containing a thiirane ring, is also discussed.Keywords – pyridazine; dipyridazino<1,4>thiazine; dipyridazino<4,5-b:4'5'-d>pyrrole; sulfur extrusion; ring contraction; Smiles rearrangement; photochemical cyclization.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N3098 – PubChem

 

1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, belongs to pyridazine compound, is a common compound. HPLC of Formula: C10H6Cl2N2OIn an article, once mentioned the new application about 1698-53-9.

Substituted 5-hydrazinopyridazin-3(2H)-ones, e.g., 4-chloro-2-(3-trifluoromethylphenyl)-5-(1-methylhydrazino)-pyridazin-3(2H)-one or 4-chloro-2-(2-fluoro-5-trifluoromethylphenyl)-5-(1-methylhydrazino)-pyridazin-3(2H)-one, are prepared by treating halogenated pyridazin-3-(2H)-ones with hydrazine and substituted hydrazines and are useful as central nervous system depressants and sleep inducers.

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Pyridazine – Wikipedia,
Pyridazine | C4H4N3085 – PubChem

 

Synthetic Route of 1698-53-9, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, molecular formula is C10H6Cl2N2O. In a Article，once mentioned of 1698-53-9

The intramolecular distances dC-Cl for chlorine bound to sp2 carbon and to sp3 carbon, respectively, and the 35Cl NQR frequencies assigned to the corresponding Cl atoms correlate quite well according to the theory: nu(35Cl) ca. (dC-Cl)-3.The relation is nu(35Cl) = (4 +/- 6) MHz + (166 +/- 31)*1E6*(dC-Cl)-3* MHz*pm3 for -Cl and nu(35Cl) = (21 +/- 5) MHz + (101 +/- 25) *1E6 * (dC-Cl)-3 *MHz * pm3 for -Cl.The crystal structures and chemical bonds of (1) (4-methyl-4-trichloromethyl-2,5-cyclohexadiene-1-one), (2) (2-chloro-4,5-dimethyl-4-trichloromethyl-2,5-cyclohexadiene-1-one), (3) (4,5-dichloro-1- phenyl-pyridazine-6-one), and (4) ( 2,2,4,5-tetrachloro-cyclopentene-1,3-dione) were studied by single crystal X-ray diffraction and 35Cl nuclear quadrupole resonance (NQR). (1) crystallizes with the space group D152h-Pbca, Z = 8.The lattice constants are a= 1206.0(3) pm, b= 1341.3(3) pm, and c = 1178.8(3) pm. (2) crystallizes monoclinic, space group C52h-P21/c, Z = 4, a = 696.3(3) pm, b = 1404.0(5) pm, c = 1151.4(5) pm, and beta = 100.23(1) deg. (3) crystallizes in the orthorhombic space group D42-P212121 , Z = 4, a = 4303(1) pm, b = 586.8(2) pm, and c = 390.5(1) pm. (4) crystallizes cubic, space group T4h-Fd3, with 48 molecules in the unit cell, a = 2181.5(5) pm.The 35Cl NQR spectra were observed for the two 2,5-cyclohexadiene-1-ones, (1) and (2) in the temperature range 77 less equal T/K less melting point.For (3), the 35Cl NQR spectra was determined at T = 77 K and T = 295 K.No phase transition has been found for the three compounds in the temperature range in which the 35Cl NQR spectroscopy was performed.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 1698-53-9

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Pyridazine – Wikipedia,
Pyridazine | C4H4N3090 – PubChem

 

Reference of 1698-53-9, 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. 1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, molecular formula is C10H6Cl2N2O. In a Patent，once mentioned of 1698-53-9

4-Chloro-5-amino-2-phenyl-3(2H)-pyridazinone is prepared from 4,5-dichloro-2-phenyl-3(2H)-pyridazinone and ammonia in high yield and substantially free from 4-amino-5-chloro-2-phenyl-3(2 H)-pyridazinone in a method comprising reacting 4,5-dichloro-2-phenyl-3(2H)-pyridazinone with aqueous ammonia in the presence of a catalyst which is capable of selectively exchanging the 5-chlorine atom in 4,5-dichloro-2-phenyl-3(2H)-pyridazinone with a leaving group of such a nature that the resulting intermediate compound is capable of alkylating ammonia to 4-chloro-5-amino-2-phenyl-3(2H)-pyridazinone in high yield in the reaction medium, thereby regenerating the catalyst. The end product is isolated by filtration after the reaction and washed with water, and the mother liquor plus the wash water are used as reaction medium for the next batch.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Reference of 1698-53-9. In my other articles, you can also check out more blogs about 1698-53-9

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Pyridazine – Wikipedia,
Pyridazine | C4H4N3077 – PubChem

 

Related Products of 1698-53-9, 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, 1698-53-9, molcular formula is C10H6Cl2N2O, introducing its new discovery.

The 13C NMR spectra of a series of 2-X-4-Y-5-Z-substituted 2-H-pyridiazin-3-ones were measured and assigned on the basis of results from one-dimensional semiselective INEPT ore one-dimensional relayed coherence transfer (HICUUP) experiments.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1698-53-9 is helpful to your research. Related Products of 1698-53-9

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Pyridazine – Wikipedia,
Pyridazine | C4H4N3103 – PubChem

 

Electric Literature of 1698-53-9, 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. 1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, molecular formula is C10H6Cl2N2O. In a Article，once mentioned of 1698-53-9

Phosphorylation of 2-Phenyl-4,5-dichloro-3(2H)-pyridazinone with Tributylphosphine. X-ray Diffraction, Spectroscopic, and Quantum-Chemical Study

Phosphorylation of 2-phenyl-4,5-dichloro-3(2H)-pyridazinone was studied and the first C-phosphorylated pyridazinone, 2-phenyl-4-tributylphosphonio-5-hydroxy-3(2H)-pyridazinone chloride, was obtained. The structure of the compound was proved by X-ray diffraction and IR and NMR spectroscopy. The possible reaction pathway was considered from the viewpoint of quantum chemistry.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Electric Literature of 1698-53-9. In my other articles, you can also check out more blogs about 1698-53-9

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Pyridazine – Wikipedia,
Pyridazine | C4H4N3108 – PubChem

 

Reference of 1698-53-9, 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.1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, molecular formula is C10H6Cl2N2O. In a article，once mentioned of 1698-53-9

Process for obtaining 4,5-dichloro-2-phenyl-3(2H)-pyridazinone from 5-chloro-4-amino-2-phenyl-3(2H)-pyridazinone

In a process for obtaining 4,5-dichloro-2-phenyl-3(2H)-pyridazinone from 5-chloro-4-amino-2-phenyl-3(2H)-pyridazinone the 5-chloro-4-amino-2-phenyl-3(2H)-pyridazinone is diazotized in a first stage in accordance with the following reaction: STR1 the compound (I) being obtained by dilution with water and filtration. In a second stage of the process the compound (I) is reacted with thionyl chloride in accordance with the following reaction: STR2 the 4,5-dichloro-2-phenyl-3(2H)-pyridazinone being obtained by dilution with water and filtration.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 1698-53-9

Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N3087 – PubChem

 

Synthetic Route of 1698-53-9, 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, 1698-53-9, molcular formula is C10H6Cl2N2O, introducing its new discovery.

Synthesis of Pyrazolo<3,4-d>pyridazines from 5-(1-Methylhydrazino)-pyridazines by Means of the Vilsmeier-Haack Reaction

Reaction of 2-substituted 5-(1-methylhydrazino)-3(2H)-pyridazinones (2a-d) with dimethylformamide-phosphorus oxychloride afforded 5-substituted 1,5-dihydro-1-methyl-4H-pyrazolo<3,4-d>pyridazin-4-ones (3a-d) in good yields.However, concurrent formation of 5-substituted 2,5-dihydro-2-(2-substituted 1-chlorovinyl)-4H-pyrazolo<3,4-d>pyridazin-4-ones (6a-c, 12, 13) (minor products) and the 1-methyl-4H-derivatives (3a-c) (major ones) was observed, when starting with the corresponding 2-substituted 5-(2-acetyl-1-methylhydrazino)-3(2H)-pyridazinones (5a-c, 9, 10) under similar conditions.A plausible mechanism for the reaction is proposed.Keywords – pyridazine; pyrazolo<3,4-d>pyridazine; Vilsmeier reagent; tri-n-butyltin chloride; sodium borohydride; stereoisomer; photoisomerization; vinyl radical

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1698-53-9 is helpful to your research. Synthetic Route of 1698-53-9

Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N3097 – PubChem