Category: phthalazine

A heterogeneous catalyst is a catalyst that is present in a different phase than the reactants. Such catalysts generally function by furnishing an active surface upon which a reaction can occur. 1242156-59-7, name is 6-(tert-Butyl)-8-fluorophthalazin-1(2H)-one, introduce a new downstream synthesis route as follows. 1242156-59-7

Under N2, acetic acid 2,6-dibromobenzyl ester (24.74 g, 80.3 mmol), 6-tert-butyl-8-fluoro-2H-phthazin-1-one (3.54 g, 16.1 mmol), Cs2CO3 (10.46 g, 32.1 mmol), CuI (4.61 g, 24.2 mmol) and N,N-dimethylethane-1,2-diamine (1.42 g, 16.1 mmol) were dissolved in DMF (70 mL). The reaction mixture was stirred at 150 C. for 4 h. The resulting mixture was cooled to room temperature and diluted with ethyl acetate (200 mL), and then 200 mL of water was added. The mixture was separated and the aqueous layer was extracted with ethyl acetate (200 mL¡Á2). The organic layers were combined and washed with water (200 mL) and brine (200 mL). The solution was dried over anhydrous sodium sulfate, filtered and concentrated. The resulting crude product was purified by silica gel chromatography (petroleum ether/ethyl acetate 4/1) to give 2-bromo-6-(6-tert-butyl-8-fluoro-1-oxo-1H-phthalazin-2-yl)-benzyl ester (3.21 g, 45%). 1H NMR (300 MHz, CDCl3): delta 8.17 (d, J=2.7 Hz, 1H), 7.71 (t, J=4.8 Hz, 1H), 7.50-7.45 (m, 2H), 7.36 (s, 1H), 7.34 (d, J=0.9 Hz, 1H), 5.17 (s, 2H), 1.94 (s, 3H), 1.42 (s, 9H). LC-MS calcd for C21H20BrFN2O3 (m/e) 446.06, obsd 447 and 449 [M+1]+.

Other significant industrial processes that involve the use of heterogeneous catalysts include the preparation of sulfuric acid, the preparation of ammonia, the oxidation of ammonia to nitric acid, and the synthesis of methanol.1242156-59-7, if you are interested, you can browse my other articles.

Reference£º
Patent; Billedeau, Roland Joseph; Kondru, Rama K.; Lopez-Tapia, Francisco Javier; Lou, Yan; Owens, Timothy D.; Qian, Yimin; So, Sung-Sau; Thakkar, Kshitij C.; Wanner, Jutta; US2012/295885; (2012); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

1242156-59-7, We know that the rate of many reactions can be accelerated by catalysts. A catalyst speeds up the rate of a reaction by lowering the activation energy; in addition, the catalyst is regenerated in the process. 6-(tert-Butyl)-8-fluorophthalazin-1(2H)-one, cas is 1242156-59-7,the phthalazine compound, below Introduce a new synthetic route.

Step 3: A oven dried flask was charged with 1-(2-formyl-3-iodo-phenyl)-3-iodo-1H-pyrazole-4-carbonitrile (1.703 g, 3.79 mmol), 6-tert-butyl-8-fluorophthalazin-1(2H)-one [prepared according to US2010/0222325] (919 mg, 4.17 mmol) and sodium bicarbonate (637 mg, 7.59 mmol) and taken up in dry dimethyl sulfoxide (30 ml). The mixture was degassed with argon in a sonication bath. Copper iodide (722 mg, 3.79 mmol) was added and the material was again degassed thoroughly. With sonication the mixture was heated to 60 C. for 2.5 hours and left at ambient overnight. Additional copper iodide (360 mg) was added and the material was heated for 4 hours at 60 C. under sonication. The flask was cooled to ambient and methylene chloride (40 ml) and water (40 ml) were added, with vigorous stirring. After 5 minutes the material was filtered through a plug of celite, rinsing well with a solution of 1% methanol in methylene chloride. The filtrate was transferred to a separatory funnel and the organic phase was collected. This was shaken with a 50% diluted brine solution (60 ml, some ragging). The methylene chloride phase was collected and the aqueous phases were back extracted with methylene chloride (note: some ragging observed. It helps to use larger volumes of organic and aqueous solutions on back extraction). The combined organic phase was dried with magnesium sulfate, filtered and stripped. The remainder was taken up in methylene chloride and purified through Analogix flash column chromatography eluting first with 100% dichloromethane (hold for 5 minutes) and then switch to a gradient of 1% to 3% methanol in dichloromethane (25 g silica gel) providing the desired 1-[3-(6-tert-butyl-8-fluoro-1-oxo-1H-phthalazin-2-yl)-2-formyl-phenyl]-3-iodo-1H-pyrazole-4-carbonitrile as a light brown powder (1.2 g). LC/MS calc’d for C23H17FIN5O2 (m/e) 541.32, obs’d 542 (M+H, ES+).

Any one of these steps may be slow and thus may serve as the rate determining step. In general, however, in the presence of the catalyst, the overall rate of the reaction is faster than it would be if the reactants were in the gas or liquid phase., 1242156-59-7

Reference£º
Patent; Billedeau, Roland Joseph; Kondru, Rama K.; Lopez-Tapia, Francisco Javier; Lou, Yan; Owens, Timothy D.; Qian, Yimin; So, Sung-Sau; Thakkar, Kshitij C.; Wanner, Jutta; US2012/295885; (2012); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

The molecularity of an elementary reaction is the number of molecules that collide during that step in the mechanism. If there is only a single reactant molecule in an elementary reaction, that step is designated as unimolecular.Phthalazin-1(2H)-one, cas is 119-39-1,the phthalazine compound. A new synthetic method of this compound is introduced below. 119-39-1

To a solution of sodium methoxide (1.52¡Á10-2 mol) in dry MeOH (40 cm3) was added 2H-phthalazin-1-one 2 (0.0137 mol). The mixture was heated under reflux for 30 minutes. Afterwards, N-tosylaziridine (1.64¡Á10-2 mol) was added and heating was continued for next 10 h. Then the mixture was cooled to ambient temperature and neutralized by solution of hydrochloric acid (1:1). The separated product was filtrated, washed with dry MeOH and purified by recrystallization from AcOEt.

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of Phthalazin-1(2H)-one, 119-39-1

Reference£º
Article; Malinowski, Zbigniew; Sroczy?ski, Dariusz; Szczes?niak, Aleksandra K.; Synthetic Communications; vol. 45; 15; (2015); p. 1743 – 1750;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

763111-47-3, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 4-(4-Fluoro-3-(piperazine-1-carbonyl)benzyl)phthalazin-1(2H)-one, cas is 763111-47-3,the phthalazine compound, it is a common compound, a new synthetic route is introduced below.

A QMA cartridge containing cyclotron -produced [18F] fluoride ion was euted with a solution containing 9 mg Kryptofix [2.2,2] (4,7.13, 16,21,24- hexaoxa- l,10-diaza bicycloi8.8.8]hexacosane), 0.08 m L 0.15 M K2C03 and 1.92 m L MeCN into a 5 m L reaction vial. Water was removed azeotropically at 120 C. 500 mug of ethyl 4-nitrobenzoate dissolved in 100 mu of DMSO was then added to the reaction vial and heated to 150 C for 15 minutes. The reaction via l was then allowed to cool as 50 mu of 1M NaOH was added. The reaction mixture was stirred for 1 min and 50 mu of 1M HCI was added to quench. Then, 2 mg of 4-(4-fiuoro-3-(piperazine-l-carbonyl)benzyi)phthaiazin- l(2H)-one dissolved in 100 mu of DMSO was added , followed by 10 mg of HBT U dissolved in 100 mu of DMSO and 20 mu. of Et3N. The reaction mixture was stirred for 1 minute. 400 mu MeCN followed by 700 mu H20 was then added and the solution was injected onto a C6-Pheny analytical HPLC column and eluted under isocratic conditions (Method B: 30% acetonitrile in water for 35min). Compound C- 2f eluted at (tR = 25.5 min), which was well resolved from the nitro analogue (4-(4-fluoro-3-(4-(4- nitrobenzoyl)piperazine-l-carbonyl)benzyl)phthalazin-l(2H)-one; tR = 30.1 min). For intravenous administration, the product-containing fraction was passed through a CIS light-SepPak cartridge preconditioned with EtOH (10 m L) and water (10 mL). The cartridge was washed with water (3 m L) and C-2f was eluted using EtOH (400 mu). The solution was then diluted with 0.9% saline to 10% EtOH. The radiochemical purity of the final formulation was confirmed using analytical HPLC.

763111-47-3. Other significant industrial processes that involve the use of heterogeneous catalysts include the preparation of sulfuric acid, the preparation of ammonia, the oxidation of ammonia to nitric acid, and the synthesis of methanol.763111-47-3, if you are interested, you can browse my other articles.

Reference£º
Patent; MEMORIAL SLOAN KETTERING CANCER CENTER; REINER, Thomas; LEWIS, Jason S.; WEBER, Wolfgang; RODRIGUEZ, Beatriz Salinas; CARNEY, Brandon; CARLUCCI, Giuseppe; (89 pag.)WO2016/33293; (2016); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

253-52-1, An elementary termolecular reaction involves the simultaneous collision of three atoms, molecules, or ions.Phthalazine, cas is 253-52-1,the phthalazine compound. Here is a downstream synthesis route of the compound 253-52-1

General procedure: A solution of sodium azide (0.085 g, 1.3 mmol) in water (10 ml) was slowly added to the methanolic solution (15 ml) of Cd(NO3)24H2O (0.2 g, 0.65 mmol) and quinazoline (0.17 g, 1.30 mmol) and stirred at room temperature for 12 h. Light yellow crystalline precipitate of [Cd(Qnz)2(N3)2]n was collected in 70percent yield. The crystals suitable for X-ray structure determination were obtained by slow recrystallization from methanol

253-52-1, There are, however, a few established termolecular elementary reactions. The reaction of nitric oxide with oxygen appears to involve termolecular steps. you can also browse my other articles about 253-52-1

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Article; Machura; Nawrot; Kruszynski; Dulski; Polyhedron; vol. 54; (2013); p. 272 – 284;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

A heterogeneous catalyst is a catalyst that is present in a different phase than the reactants. Such catalysts generally function by furnishing an active surface upon which a reaction can occur. 152265-57-1, name is 7-Bromophthalazin-1(2H)-one, introduce a new downstream synthesis route as follows. 152265-57-1

Bis(pinacolato)diboron (1.1 equiv), potassium acetate (3.5 equiv) and 1,1′- bis(diphenylphosphino)ferrocene (0.05 equiv) were dissolved in dioxane. The mixture was degassed with nitrogen for 20 minutes before the addition of PdCl2(dppf) (0.05 equiv). The mixture was degassed for a further 5 minutes. The mixture was heated to reflux for 16 hours and then allowed to cool to room temperature. Water was added to the mixture before it was extracted with EtOAc (2 X 2 reaction volumes). The combined organic fractions were dried (MgSO4), filtered aned concentrated in vacuo before being purified by flash chromatography (SiO2) neat hexanes going to 1 : 1 – Hexanes:EtOAc then neat EtOAc to give the desire product as a white crystalline solid.7-(4,4,5,5-Tetramethyl-[l,3,2]dioxaborolan-2-yl)-2H-phthalazin-l-one: (86 % yield, 92 % purity) m/z (LC-MS5ESP): 191.3 [M+H]+, R/T = 2.29 min)

Other significant industrial processes that involve the use of heterogeneous catalysts include the preparation of sulfuric acid, the preparation of ammonia, the oxidation of ammonia to nitric acid, and the synthesis of methanol.152265-57-1, if you are interested, you can browse my other articles.

Reference£º
Patent; KUDOS PHARMACEUTICALS LIMITED; WO2008/23161; (2008); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

103119-78-4, Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.5-Bromophthalazine, cas is 103119-78-4,the phthalazine compound, below Introduce a new synthetic route.

(2) N-(2-chloro-5-(5-phthalazinyl)-3-pyridinyl)-4-fluorobenzenesulfonamide:; A suspension of N-(2-chloro-5-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)pyridin-3-yl)-4- fluorobenzenesulfonamide (149 mg, 362 mumol), 5-bromophthalazine (63 mg, 301 mumol), dichloro[l,rbis(diphenylphoshino)ferrocene]palladium(II)dichloromethane adduct (17 mg, 23 mumol), and Na2Cpsi3 (96 mg, 904 mumol) in 1,4-dioxane (2 mL) and water (1 mL) was spurged with nitrogen for 5 minutes, then heated to 100 0C for 2 hours. The reaction was then partitioned between 9: 1 CHC13/IPA (30 mL) and 5percent NaHCO3 (10 mL). The separated organic was dried over Na2SO4, concentrated onto dry silica, and then purified on silica eluting with l->4percent of MeOH/DCM. Product was isolated as light yellow solid. MS (ESI pos. ion) m/z calc’d for Ci9H12ClFN4O2S: 414.0; found 415.0. 1H NMR (400 MHz, DMSO-d6) delta ppm 7.44 (t, J=8.7 Hz, 2 H) 7.83 – 7.90 (m, 2 H) 7.96 (d, J=2.1 Hz, 1 H) 8.04 (d, J=7.0 Hz, 1 H) 8.15 (t, J=7.7 Hz, 1 H) 8.30 (d, J=8.0 Hz, 1 H) 8.51 (d, J= 2.0 Hz, 1 H) 9.43 (s, 1 H) 9.79 (d, J= 1.2 Hz, IH) 10.61 (s, 1 H).

103119-78-4, There are, however, a few established termolecular elementary reactions. The reaction of nitric oxide with oxygen appears to involve termolecular steps. you can also browse my other articles about 103119-78-4

Reference£º
Patent; AMGEN INC.; WO2009/155121; (2009); A2;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

One of the major reasons is to use measurements of the macroscopic properties of a system, 119-39-1, such as the rate of change in the concentration of reactants or products with time, to discover the sequence of events that occur at the molecular level.Phthalazin-1(2H)-one, cas is 119-39-1,the phthalazine compound, introduce a new downstream synthesis route.

Weighing 2H-phthalazin-1-one (150 mmol), tert-butyl 5-{[(2-chlorophenoxy)carbonyl]amino}-3,4-dihydroisoquinoline-2(1H)-carboxylate (195 mmol) in reaction bottle, adding DMF100ml, 55 C lower reaction overnight, stopping the reaction, by adding water 100 ml, dichloromethane 200 ml, extraction, separation of the organic phase, the aqueous phase to continue to dichloromethane is used for extraction (3 * 50 ml), the combined organic phase, anhydrous sodium sulfate drying, column chromatography purification obtained title compound.

The chemical industry reduces the impact on the environment during synthesis,119-39-1,Phthalazin-1(2H)-one,I believe this compound will play a more active role in future production and life.

Reference£º
Patent; Nanjing Advanced Biological Materials And Process Equipment Institute Co., Ltd.; Guo Chengjie; (12 pag.)CN109481442; (2019); A;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, name: Phthalazine, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 253-52-1, Name is Phthalazine, molecular formula is C8H6N2

A new class of luminescent tricarbonyl rhenium(I) complexes containing bridging 1,2-diazine ligands: electrochemical, photophysical, and computational characterization

A novel class of luminescent tricarbonyl rhenium(I) complexes of general formula [Re2(mu-X)2(CO)6(mu-diaz)] (X = halogen and diaz = 1,2-diazine) was prepared by reacting [ReX(CO)5] with 0.5 equiv of diazine (seven different ligands were used). The bridging coordination of the diazine in these dinuclear complexes was confirmed by single-crystal X-ray analysis. Cyclic voltammetry in acetonitrile showed for all the complexes (but the phthalazine derivative) a chemically and electrochemically reversible ligand-centered reduction, as well as a reversible metal-centered bielectronic oxidation. With respect to the prototypical luminescent [ReCl(CO)3(bpy)] complex, the oxidation is more difficult and the reduction easier (about +0.3 V), so that a similar highest occupied molecular orbital-lowest unoccupied molecular orbital gap is observed. All of the complexes exhibit photoluminescence at room temperature in solution, with broad unstructured emission from metal-to-ligand charge-transfer states, at lambda in the range 579-620 nm. Lifetimes (tau = 20-2200 ns) and quantum yields (Phi up to 0.12) dramatically change upon varying the bridging ligand X and the diazine substituents: in particular, quantum yields decrease in the series Cl, Br, and I and in the presence of substituents at the alpha positions of the pyridazine ring. A combined density functional and time-dependent density functional study of the geometry, relative stability, electronic structure, and photophysical properties of all the pyridazine derivatives was performed. The nature of the excited states involved in the electronic absorption spectra was ascertained, and trends in the energy of the highest occupied and lowest unoccupied molecular orbitals upon changing the pyridazine substituents and the bridging halogen ligands were discussed. The observed emission properties of these complexes were shown to be related to a combination of steric and electronic factors affecting their ground-state geometry and their stability.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. name: Phthalazine, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 253-52-1, in my other articles.

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Phthalazine – Wikipedia,
Phthalazine | C8H6N130 – PubChem

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Safety of Phthalazine. Introducing a new discovery about 253-52-1, Name is Phthalazine

An Amine Group Transfer Reaction Driven by Aromaticity

A stereoselective domino inverse electron-demand Diels-Alder/amine group transfer reaction catalyzed by a bidentate Lewis acid provides 1-amino-1,2-dihydronaphthalenes, a core structure in many bioactive compounds. A concerted mechanism is proposed based on experimental studies as well as DFT computations demonstrating a new general reactivity scheme. The broad scope of the reaction was evaluated by variation of all three starting compounds, phthalazines, aldehydes, and amines. Scalability was demonstrated by a gram scale reaction without diminished yield.

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.Safety of Phthalazine, you can also check out more blogs about253-52-1

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Phthalazine – Wikipedia,
Phthalazine | C8H6N23 – PubChem