Category: 28466-26-4

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 28466-26-4, name is 4-Aminopyrazole, This compound has unique chemical properties. The synthetic route is as follows., Safety of 4-Aminopyrazole

Intermediate 25: 1 ,1-Dimethylethyl 6-[(1 /-/-pyrazol-4-ylamino)carbonyl1-3,4-dihydro- 2(1 HVisoalphauinolinecarboxylate; To a solution of 1 H-pyrazol-4-amine (1.87 g, 22.5 mmol), N-(3-dimethylaminopropyl)- N’-ethylcarbodiimide hydrochloride (5.18 g, 27 mmol), 1-hydroxybenzotriazole hydrate (3.65 g, 27 mmol) and triethylamine (6.3 ml_, 45 mmol) in DMF was added 2- {[(I J-dimethylethyOoxylcarbonylJ-i ^^^-tetrahydro-theta-isoquinolinecarboxylic acid (5.62 g, 20.3 mmol) and the reaction mixture was stirred at room temperature for 16 hours. The volatiles were removed under reduced pressure, the residue was dissolved in MeOH and potassium hydroxide (5.04 g, 90 mmol), water (100 ml.) was added and the mixture was heated at 500C for 15 min. The MeOH was evaporated under reduced pressure and the solid which crystallized was filtered and recrystallized from acetonitrile to give the title compound as a solid (3.7 g, 48%). LC/MS: m/z 341 (M-H)+, Rt: 2.80 min.

According to the analysis of related databases, 28466-26-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; SMITHKLINE BEECHAM CORPORATION; WO2008/74824; (2008); A2;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Reference of 28466-26-4, 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. 28466-26-4, name is 4-Aminopyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

0.2g of compound 2 and 0.11g of 4-aminopyrazole were dissolved in n-butanol. 0.27g of N,N-diisopropylethylamine was added to the solution and was heated at 150C under microwave for 2h. After completion of the reaction, the solvent was evaporated to dryness using a rotary evaporator under reduced pressure to obtain a crude product. The product was purified by column chromatography (dichloromethane:methanol = 20:1) to give 0.15g of compound 3 as a yellow solid, yield: 65%.

The synthetic route of 4-Aminopyrazole has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Shandong University; Zhang, Yingjie; Xu, Wenfang; Liang, Xuewu; (24 pag.)CN105418616; (2016); A;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 28466-26-4, name is 4-Aminopyrazole, This compound has unique chemical properties. The synthetic route is as follows., Product Details of 28466-26-4

Compound 4,6-dichloropyridazine-3-carboxylic acid methyl ester 1a (206 mg, 1 mmol),1H-pyrazole-4-amine (83mg, 1mmol),Diisopropylethylamine (258mg, 2mmol)Mix with ethanol (20 mL), heat to 80 C and stir for 2 hours.After cooling to room temperature, the solvent was removed under reduced pressure, and the residue was purified by silica gel column chromatography (dichloromethane / methanol = 19/1).The target product 4-((1H-pyrazol-4-yl) amino) -6-chloropyridazine-3-carboxylic acid methyl ester 41a (150 mg, yellow solid) was obtained,Yield: 59%.

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 28466-26-4.

Reference:
Patent; Beijing Nuochengjianhua Pharmaceutical Technology Co., Ltd.; Chen Xiangyang; Pang Yucheng; (142 pag.)CN110818641; (2020); A;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Synthetic Route of 28466-26-4, These common heterocyclic compound, 28466-26-4, name is 4-Aminopyrazole, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

A mixture of N-(2-chloropyrimidin-4-yl)-l-isopropyl-lH-imidazo[4,5-c]pyridin-6-amine (Example 12, Step 4) (51.1 mg, 0.177 mmol), lH-pyrazol-4-amine (23.9 mg, 0.288 mmol), trifluoroacetic acid (10.0 mu^, 0.129 mmol) and fert-butanol (1.5 mL, 16 mmol) was heated in a sealed vial at 100 C for 2 days. The reaction mixture was diluted with dichloromethane, washed with saturated aqueous sodium bicarbonate, dried over magnesium sulfate, filtered, and evaporated in vacuo. The crude product (20.3 mg) was purified via reverse-phase HPLC and lyophilized to yield 4.6 mg (8%) of the title compound. LCMS (ESI): RT (min) = 3.051, [M+H]+ = 336.2, method = B; lH NMR (400 MHz, DMSO-d6) delta 12.43 (s, 1H), 9.72 (s, 1H), 8.83 (s, 1H), 8.66 (d, J = 1.0 Hz, 1H), 8.38 (s, 1H), 8.01 (d, J = 5.7 Hz, 1H), 6.67 (s, 1H), 4.62 (br s, 1H), 1.51 (d, J = 6.6 Hz, 6H).

Statistics shows that 4-Aminopyrazole is playing an increasingly important role. we look forward to future research findings about 28466-26-4.

Reference:
Patent; GENENTECH, INC.; BRYAN, Marian C.; CHAN, Bryan; HANAN, Emily; HEFFRON, Timothy; PURKEY, Hans; ELLIOTT, Richard Leonard; HEALD, Robert; KNIGHT, Jamie; LAINCHBURY, Michael; SEWARD, Eileen M.; WO2014/81718; (2014); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Application of 28466-26-4, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 28466-26-4 name is 4-Aminopyrazole, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

As shown in step 6-iii of Scheme 6, lH-pyrazol-4-amine (149 mg, 1.79 mmol), methyl 2-(bromomethyl)-4-(5,6-dimethoxy-3-pyridyl)-6-methyl-benzoate (680 mg, 1.79 mmol) and DIEA (231 mg, 312 mu^, 1.79 mmol) were combined in DMF (5 mL), heated to 90C for 6 hours, and allowed to cool to room temperature over 16 hours. The reaction mixture was taken up in EtO Ac/water and the organic layer washed with water, brine, dried, and concentrated under reduced pressure to yield a foam. The foam was recrystallized in DCM/MeOH. The resulting solid was collected by filtration, washed with DCM, and dried under vacuum to provide 5-(5,6-dimethoxy-3-pyridyl)-7-methyl-2-(lH-pyrazol-4- yl)isoindolin-l-one (Compound 2024, 115 mg). The filtrate from the recrystallization was concentrated under reduced pressure and the residue purified by silica gel chromatography (20 to 100% EtO Ac/hex) to yield an additional 88 mg of Compound 2024 (total yield 203 mg, 0.66 mmol, 32% yield): ESMS (Mu+Eta) 351.26; 1H NMR (DMSO-d6) delta 12.83 (s, 1Eta), 8.10 (m, 2Eta), 7.88 (s, 1Eta), 7.74 (s, 1Eta), 7.61 (s, 2Eta), 4.83 (s, 2Eta), 3.92 (s, 3Eta), 3.91 (s, 3Eta), 2.72 (s, 3Eta).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 4-Aminopyrazole, and friends who are interested can also refer to it.

Some common heterocyclic compound, 28466-26-4, name is 4-Aminopyrazole, molecular formula is C3H5N3, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. SDS of cas: 28466-26-4

Compound 31-a (130 mg, 1.5 mmol) and compound 5 (222 mg, 0.5 mmol) were dissolved in n-butanol (10 mL), p-toluene sulfonic acid monohydrate (344 mg, 2.0 mmol) was added. The mixture was heated to 120 C. and stirred for 3 hours. After cooled to room temperature, the mixture was treated with saturated aqueous sodium bicarbonate solution (10 mL), then extracted with dichloromethane (10 mL¡Á3). The organic layers were combined, washed with water (10 mL¡Á3) and saturated brine (10 mL) in sequence, dried over anhydrous sodium sulfate, then filtrated. The residue was purified by preparation HPLC (mobile phase:water (0.04% trifluoroacetic acid), acetonitrile; gradient: 32%-62%) to give compound T-31 (143 mg, yield: 61%). LC-MS (ESI): m/z=470 [M+H]+. (0255) 1H-NMR (400 MHz, DMSO-d6) delta: 9.43 (s, 1H), 8.81 (s, 1H), 8.37 (s, 1H), 8.34 (d, J=4.0 Hz, 1H), 7.87 (s, 2H), 739 (d, J=4.0 Hz, 1H), 4.57 (d, J=8 Hz, 2H), 4.27 (d, J=8 Hz, 2H), 3.91 (s, 4H), 3.24 (q, J=6 Hz, 2H), 1.25 (t, J=6 Hz, 3H) ppm

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 28466-26-4, its application will become more common.

Application of 28466-26-4, These common heterocyclic compound, 28466-26-4, name is 4-Aminopyrazole, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

To a solution of (2S,3R,4R)- I -acetyl-2-cyclopropyl-3-methyl-4-((6-methylpyridin-2-yl)amino)- 1,2,3,4- tetrahydroquinoline-6-carboxylic acid (for a preparation see Example 247, 50 mg, 0.132 mmol) andHATU (90 mg, 0.198 mmol) in N,N-dimethylformamide (DMF)(1 mL)was added IH-pyrazol-4-amine (13 mg, 0.158 mmol) followed by DIPEA (0.097 mL, 0.553 mmol). The reaction mixture was stirred at rt for 90 mm, then purified directly by MDAP (HpH). The solvent was evaporated in vacuo to give the product (8 mg). LCMS (2 mm High pH): Rt = 0.88 mi [MH] = 445.

Statistics shows that 4-Aminopyrazole is playing an increasingly important role. we look forward to future research findings about 28466-26-4.

Related Products of 28466-26-4, These common heterocyclic compound, 28466-26-4, name is 4-Aminopyrazole, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

As shown in step 5-i of Scheme 5, methyl 4-bromo-2-(bromomethyl)benzoate (Compound 2018, 2.08 g, 6.75 mmol; prepared by reacting l-(4-bromo-2- methylphenyl)ethanone with NBS),lH-pyrazol-4-amine (561 mg, 6.75 mmol), and DIEA (873 mg, 1.18 mL, 6.75 mmol) were combined in DMF (7.78 mL) and heated at 110 C for 90 min. The reaction mixture was diluted with MeOH (60 mL) and the resulting white crystaline solid was collected by filtration and dried under vacuum to give 5-bromo-2-(lH- pyrazol-4-yl)isoindolin-l-one (Compound 2019, 1.21 g, 4.35 mmol, 64% yield): ESMS (Mu+Eta) 279.99

Statistics shows that 4-Aminopyrazole is playing an increasingly important role. we look forward to future research findings about 28466-26-4.

Adding a certain compound to certain chemical reactions, such as: 28466-26-4, name is 4-Aminopyrazole, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 28466-26-4, COA of Formula: C3H5N3

10055] A 250-mL 3-neck flask was charged with iH-pyrazol-4-amine (5 g, 60.2 mmol) and dichloromethane (50 mL). The resulting suspension was cooled to 5 C. and triethylamine (9.i3 g, 90.0 mmol) was added, followed by acetic anhydride (7.37 g, 72.2 mmol) at <20 C. The reaction was stirred at room temperature for i 8 hours, at which point thin layer chromatography (Eluent: ethyl acetate) analysis indicated that the reaction was incomplete. Additional triethylamine (4.57 g, 45.0 mmol) and acetic anhydride (3.70 g, 36.0 mmol) were added and the reaction was heated at 30 C. for an additional 3 hours to give a dark solution, at which point thin layer chromatography analysis indicated that only a trace of starting material remained. The reaction mixture was purified by flash column chromatography using ethyl acetate as eluent. The fractions containing pure product were combined and concentrated to dryness to afford an off-white solid. The solid was dried under vacuum at room temperature for i 8 hours (5.55 g, 55%):10056] ?H NMR (400 MHz, DMSO-d5) oe iO.30 (s, iH),8.39 (d, J=0.7 Hz, iH), 7.83 (d, J=0.7 Hz, iH), 2.60 (s, 3H),2.03 (s, 3H); ElMS mlz i67 ([M]j. In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 4-Aminopyrazole, other downstream synthetic routes, hurry up and to see.

28466-26-4, name is 4-Aminopyrazole, belongs to pyrazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. name: 4-Aminopyrazole

lH-Pyrazol-4-amine (10.4 g, 125 mmol) was dissolved in concentrated HCl (36.8 mL)/water (186 mL) and cooled to 0C. A solution of sodium nitrite (9.05g, 131 mmol) in water (122 mL) was added dropwise while maintaining the internal temperature below 4C. On complete addition, the mixture was stirred at 0C for 30 min. The resulting diazonium chloride solution was added via a pipette to a solution of tert-butyl acetoacetate (21.8 mL, 131 mmol) and sodium acetate (124 g, 1.51 mol) in water (122 mL) and EtOH (122 mL) at 0C. The resulting mixture was stirred between 0-1 C for two hours. The solid was filtered and dried in-vacuo to afford terf -butyl 3-oxo-2-[lH-pyrazol-4-yldiazenyl]butanoate as a yellow-brownish powder. LRMS (ESI) calc’d for CI 1Eta17Nu403 [M+H]+: 253, Found: 253.

The synthetic route of 28466-26-4 has been constantly updated, and we look forward to future research findings.