Day: February 24, 2021

Related Products of 5932-27-4,Some common heterocyclic compound, 5932-27-4, name is Ethyl 1H-pyrazole-3-carboxylate, molecular formula is C6H8N2O2, 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 ethyl 1H-pyrazole-3-carboxylate (1.80 g, 12.8 mmol) in toluene (12 mL) were added 3,4-dihydro-2H-pyran (1.13 mL, 13.5 mmol) and TFA (14 muL, 128 mumol) and the mixture was stirred at 80¡ã C. for 2 h. The volatiles were removed under reduced pressure and the residue was dissolved in EtOAc and was washed with aqueous Na2CO3 and brine. The organic layer was dried and the volatiles were removed under reduced pressure to give the desired compound which was used in the next step without further purification (2.6 g, 90percent).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Ethyl 1H-pyrazole-3-carboxylate, its application will become more common.

16461-94-2, name is 4-Bromo-1H-pyrazol-3-amine, 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. Recommanded Product: 16461-94-2

EXAMPLE 27 3-Bromo-7-(3-furyl)pyrazolo[1,5-a]pyrimidine A mixture of 0.01 mole of 3-dimethylamino-1-(3-furyl)-2-propen-1-one and 0.01 mole of 3-amino-4-bromopyrazole in glacial acetic acid is heated at reflux temperature for 6 hours. The solvent is removed to give the product of the example.

The synthetic route of 16461-94-2 has been constantly updated, and we look forward to future research findings.

Synthetic Route of 14531-55-6, 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. 14531-55-6, name is 3,5-Dimethyl-4-nitro-1H-pyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

A solution of 3,5-dimethyl-4-nitro-1H-pyrazole (5.00 g, 35.4 mmol) and (4-cyanophenyl)boronic acid (5.21 g, 35.4 mmol) in dichloromethane (50 ml, 780 mmol) was treated with anhydrous cupric acetate (9.65 g, 53.1 mmol), pyridine (29 ml, 350 mmol) and molecular sieves (7.93 g). The mixture was stirred under an argon atmosphere at ambient temperature for 2 days. The mixture was filtered over a pad of kieselgur, the remainng filter cake was washed with dichloromethane. The filtrate was washed with water, dried over sodium sulfate and concentrated under reduced pressure. The crude product was purified by falsh-chromatography on silics gel (dichloromethane/ethyl acetate 40: 1, column: SNAP Ultra 100 g) to yield 2.60 g (30%) of the desired product. LC-MS (method 9): Rt = 0.88 min; MS (ESIpos): m/z = 243 [M+H]+1H-NMR (400 MHz, dimethylsulfoxide-d6) delta [ppm]: 2.625 (16.00), 7.797 (0.49), 7.802 (3.48), 7.807 (1.24), 7.819 (1.33), 7.824 (4.13), 7.829 (0.63), 8.076 (0.59), 8.081 (3.97), 8.086 (1.28), 8.098 (1.17), 8.103 (3.35), 8.109 (0.49).

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, 3,5-Dimethyl-4-nitro-1H-pyrazole, other downstream synthetic routes, hurry up and to see.

5334-39-4, name is 3-Methyl-4-nitro-1H-pyrazole, 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. Safety of 3-Methyl-4-nitro-1H-pyrazole

A mixture of 3-methyl-4-nitro-lH-pyrazole (2.1 g, 17 mmol) and 4- methylsulfonylphenylboronic acid (5.0 g, 25 mmol), copper (II) acetate monohydrate (0.91 g, 5.0 mmol) and pyridine (0.5 g, 6.6 mmol) in DMF was stirred at 95 C under an oxygen atmosphere for 7 hours. The reaction was diluted with water, extracted with EtOAc (3x). The combined extracts were washed with brine, dried over sodium sulfate, filtered and concentrated. The crude product was purified by flash chromatography to give a mixture of 3 -methyl- 1 -(4- (methylsulfonyl)phenyl)-4-nitro-lH-pyrazole compound and 5 -methyl- 1 -(4-(methylsulfonyl)phenyl)-4-nitro-lH-pyrazole (1.3 g, 28%).

The synthetic route of 5334-39-4 has been constantly updated, and we look forward to future research findings.

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. 10010-93-2, name is 3-Methyl-5-(trifluoromethyl)-1H-pyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. SDS of cas: 10010-93-2

Example 8 Synthesis of 1-[1-(4-fluorophenyl)-6,7-dihydro-5H-pyrazolo[4,3-b]pyridin-4-yl]-2-[5-methyl-3-(trifluoromethyl)pyrazol-1-yl]ethanone 2-Chloro-1-(1-(4-fluorophenyl)-6,7-dihydro-1H-pyrazolo[4,3-b]pyridin-4(5H)-yl)ethanone (118 mg, 0.4 mmol) was diluted in 1.2 mL of 2:1 THF:DMF and treated with K2CO3 (111 mg, 0.8 mmol) and 5-methyl-3-(trifluoromethyl)-1H-pyrazole (60 mg, 0.4 mmol). The slurry was heated to 75 C. for 2 hours. The reaction slurry was purified by normal phase flash chromatography (24 g column, eluting with 10-80% EtOAc in hexanes) to provide 109 mg (67%) of the title compound as a white solid. 1H NMR (400 MHz, CDCl3) delta 8.36 (s, 0.8H), 7.59 (s, 0.2H), 7.42-7.47 (m, 2H), 7.12-7.25 (m, 2H), 5.25 (s, 0.4H), 5.14 (s, 1.6H), 3.92 (m, 0.4H), 3.86 (m, 1.6H), 2.86 (t, J=6.2 Hz, 2H), 2.37 (s, 2.4H), 2.36 (m, 0.6H), 2.11 (m, 1.6H), 2.04 (m, 0.4H); MS: (ES) m/z calculated for C19H18F4N5O [M+H]+ 408.1, found 408.1.

The synthetic route of 10010-93-2 has been constantly updated, and we look forward to future research findings.

64517-88-0, name is 1,3-Dimethyl-1H-pyrazol-4-amine, 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. Quality Control of 1,3-Dimethyl-1H-pyrazol-4-amine

Example 1.012- [ [5-C yano-2- [(1 ,3-dimethylpyrazol-4-yl)aminol -4-pyridyll amino I -N-methyl- benzamide 2-[(2-Chloro-5-cyanopyridin-4-yl)amino]-N-methylbenzamide (200 mg, 0.70 mmol), palladium(II) acetate (12.53 mg, 0.06 mmol), l,3-dimethylpyrazol-4-amine (155 mg, 1.40 mmol), 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (48.4 mg, 0.08 mmol) and cesium carbonate (273 mg, 0.84 mmol) were suspended in dioxane (5 mL). The mixture was purged for 5 minutes with nitrogen and then heated at 900C for 24 hours. The mixture was allowed to cool to room temperature and then loaded onto an SCX column. The mixture was eluted first with MeOH and then with a solution of 7N NH3 in MeOH. Fractions containing product were combined and then evaporated. The residue was purified by preparative HPLC and fractions containing product were combined and evaporated to afford example 1.01 (126 mg, 50% yield); 1U NMR spectrum: (300 MHz, DMSO) delta 2.12 (3H, s), 2.84 (3H, d), 3.77 (3H, s), 6.60 (IH, s), 7.21 (IH, ddd), 7.58 (2H, d), 7.79 (IH, d), 7.88 (IH, s), 8.35 (IH, s), 8.66 (IH, s), 8.72 (IH, d), 10.28 (IH, s); Mass spectrum: m/z (ESI+) (M+H)+ = 362.11.

The synthetic route of 64517-88-0 has been constantly updated, and we look forward to future research findings.

Reference of 35100-92-6,Some common heterocyclic compound, 35100-92-6, name is 1,5-Dimethyl-1H-pyrazol-3-amine, molecular formula is C5H9N3, 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.

Intermediate IVa (R)-tert-butyl 4-(2-chloro-4-(( 1 ,5 -dimethyl- 1 H-pyrazol-3 -yl)amino)pyrimidin-5 -yl)-2- methylpiperazine- 1 -carboxylate In a 25 mL Biotage microwave vial (R)-tert-butyl 4-(2,4-dichloropyrimidin-5-yl)-2- methylpiperazine-1 -carboxylate (500 mg, 1.44 mmol, Intermediate III ) and 1,5- dimethyl-lH-pyrazol-3 -amine (160 mg, 1.44 mmol, Princeton Bio.) was taken in ethanol (10 mL). N,N-diisopropylethylamine (0.754 mL, 4.32 mmol) was added and the reaction mass was subjected to microwave irradiation at 120 C for 4 hours. The reaction was monitored by LCMS and identified the required mass. Reaction mass was cooled and evaporated to dryness and the residue was then chromatographed with EtoAc/Hexane on silica to get pure solid of (R)-tert-butyl 4-(2-chloro-4-((l,5-dimethyl- lH-pyrazol-3-yl)amino)pyrimidin-5-yl)-2-methyl piperazine-l-carboxylate (300 mg, 49.4 %) MS (ES+), (M+H)+= 422.20 for Ci9H28ClN702

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1,5-Dimethyl-1H-pyrazol-3-amine, its application will become more common.

Related Products of 5334-40-7, These common heterocyclic compound, 5334-40-7, name is 4-Nitro-1H-pyrazole-3-carboxylic acid, 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.

Step 1:4-nitropyrazol-3-carbonyl chloride 4-nitro-pyrazol-3-formic acid (3g, 19.1 mmol), thionyl chloride (100mL) and N, N-dimethylformamide (0.1mL) were added to a 250mL reaction flask. The reaction mixture was heated up to reflux and stirred for 3 hours. After completion of the reaction, the reaction solution was concentrated to obtain the title compound (3.33g), the crude product was used directly for the subsequent reaction. (MS: [M+1] none)

Statistics shows that 4-Nitro-1H-pyrazole-3-carboxylic acid is playing an increasingly important role. we look forward to future research findings about 5334-40-7.

Electric Literature of 1280210-79-8,Some common heterocyclic compound, 1280210-79-8, name is tert-Butyl 4,6-dihydropyrrolo[3,4-c]pyrazole-5(2H)-carboxylate, molecular formula is C10H15N3O2, 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.

3 -(Bromomethyl)- 1,1 -difluoro-cyclobutane (505 mg, 2.73 mmol) was added dropwisc over 15 mm, to a mixture of tert-butyl 4,6-dihydro-2H-pyrrolo[3,4- c]pyrazole-5-carboxylate (560 mg, 2.67 mmol), cesium carbonate (1.39 g, 4.28 mmol) and DMF (5 mL) at 0 C. The reaction mixture was allowed to warm to ambient temperature and stirred for 18 h. The solvent was concentrated and the material was partitioned betweenwater (50 mL) and EtOAc. The aqueous layer was washed with EtOAc (2 x 30 mL). The combined organic layers were washed with brine, dried (MgSO4), and the solvent was concentrated. Purification (FCC, Si02 using ether) provided the title compound (344 mg, 41%). ?H NMR (300 MHz, CDC13) 3 = 7.10 (d, J = 10.0 Hz, 1H), 4.50 -4.37 (m, 4H), 4.18 (d, J = 5.5 Hz, 2H), 2.78-2.56 (m, 3H), 2.47-2.25 (m, 2H), 1.50 (s, 9H); [M+H] = 314.26.

The synthetic route of 1280210-79-8 has been constantly updated, and we look forward to future research findings.

Application of 6825-71-4, 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. 6825-71-4, name is Ethyl 3,5-diamino-1H-pyrazole-4-carboxylate belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

To a solution of ethyl 3,5-diamino-lH-pyrazole-4-carboxylate (5.00 g, 29.38 mmol) in DMF (80 mL) were added 1 , 1 ,3,3-tetramethoxypropane (14.50 mL, 88.15 mmol) and AcOH (0.34 mL, 5.88 mmol). The reaction mixture was stirred at 100 C for 14 h, and then concentrated in vacuo. The residue was partitioned between DCM (50 mL) and water (50 mL). The organic phase was separated and the aqueous phase was extracted with DCM (100 mL x 3). The combined organic phases were washed with brine (100 mL), dried over anhydrous Na2S04, filtered and concentrated in vacuo. The residue was purified by a silica gel column chromatography (a solution of NH3in MeOH (7 M)/DCM (v/v) =1/100) to give the title compound as a pale yellow solid (3.52 g, 58.1%).MS (ESI, pos. ion) m/z: 207.1 [M+H]+; H NMR (400 MHz, CDC1 ): delta (ppm) 8.60 (dd, J= 4.40 Hz, 1.76 Hz, 1H), 8.46 (dd, J = 6.76 Hz, 1.76 Hz, 1H), 6.86 (dd, J = 6.72 Hz, 4.40 Hz, 1H), 4.50 (q, J = 7.08 Hz, 2H), 1.47 (t, J = 7.08 Hz, 3H).

The synthetic route of Ethyl 3,5-diamino-1H-pyrazole-4-carboxylate has been constantly updated, and we look forward to future research findings.