Category: 3524-32-1

Reference of 3524-32-1, 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. 3524-32-1, name is 5-Amino-1,3-dimethylpyrazole, This compound has unique chemical properties. The synthetic route is as follows.

To a solution of 9-((4-chloro-l H-pyrazol- l-yl)methyl)-4-(2- (rnethylsulfonyl)pyrimidin-4-yl)-8,9-dihydro-7H-6-oxa-l,2,2al-triazabenzo[cd]azulene (15- 4b, 200 mg, 0.44 mmol), 2,5-dimethylpyrazol-3-amine (149.5 mg, 1.34 mmol) in DMSO (2 mL) was added NaH (35.80 mg, 28 mmol, 60% mineral oil dispersion). The reaction was stirred at RT for 45 min, quenched with water and extracted with EtOAc (3 x 20 mL). The combined extracts were washed with 5% citric acid, brine, dried (Na2S04), filtered and concentrated in vacuo. The crude product was purified by Si02 chromatography (ISCO 12 g column) eluting with a MeOH/DCM gradient (0 to 8% MeOH) to afford 95 mg (88.5%) of the title compound as yellow solid.

The chemical industry reduces the impact on the environment during synthesis 5-Amino-1,3-dimethylpyrazole. I believe this compound will play a more active role in future production and life.

Electric Literature of 3524-32-1, 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. 3524-32-1, name is 5-Amino-1,3-dimethylpyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

General procedure: In a 50 mL single-mouth flask,Salicylaldehyde (1 mmol) was added in sequence,Ethyl cyanoacetate (1 mmol) and 3-methyl-1-phenyl-5-aminopyrazole (1 mmol),Triethylamine (0.1 mmol) and ethanol (8 mL),The reaction was stirred under reflux for 8 h.After the reaction is over,Cool to room temperature.Rotate the solvent under reduced pressure,Get a rough product,The crude product was recrystallized from 95% ethanol.5-amino-1-methyl-3-phenylcoumarin[4,3-d]pyrazolo[3,4-b]pyridine-6(3H)-one (Ia):Yield 63%

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, 5-Amino-1,3-dimethylpyrazole, other downstream synthetic routes, hurry up and to see.

Related Products of 3524-32-1, These common heterocyclic compound, 3524-32-1, name is 5-Amino-1,3-dimethylpyrazole, 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.

Example 55 2-[5-Cyclopropyl-2-(2,5-dimethyl-2H-pyrazol-3-ylamino)-pyridin-4-ylamino]-N-methoxy-benzamide To a 10 mL microwave tube were added 2-(2-chloro-5-cyclopropyl-pyridin-4-ylamino)-N-methoxy-benzamide (0.075 g, 0.24 mmol, 1 eq), 2,5-dimethyl-2H-pyrazol-3-ylamine (0.05 g, 0.47 mmol, 2 eq), Cs2CO3 (0.23 g, 0.71 mmol, 3 eq), and 1,4-dioxane (3 mL). The resulting mixture was degassed with N2 for 15 min. To this was added Pd2(dba)3 (0.015 g, 0.014 mmol, 0.06 eq) and xanthphos (0.03 g, 0.06 mmol, 0.25 eq) and the mixture was again degassed with N2 for 30 min. The resulting mixture was irradiated in a CEM microwave at 120 C., 150 W for 35 min. After completion of reaction, solvent was removed under reduced pressure and crude compound was purified using column chromatography over silica gel (100-200 mesh) using 1% MeOH-DCM as the eluant followed by prep HPLC. Solid compound so obtained was washed with diethyl ether and pentane to give the title compound as an off white solid (11 mg, 12%). 1H-NMR (400 MHz, DMSO-d6): delta 0.52-0.60 (m, 2H), 0.82-1.00 (m, 2H), 1.50-1.62 (m, 1H), 2.05 (s, 3H), 3.52 (s, 3H), 3.70 (s, 3H), 5.96 (s, 1H), 6.67 (s, 1H), 6.98-7.10 (m, 1H), 7.40-7.60 (m, 3H), 7.73 (s, 1H), 8.39 (s, 1H), 9.46 (s, 1H), 11.88 (brs, 1H). LC-MS [M+H]+=393.4.

The synthetic route of 3524-32-1 has been constantly updated, and we look forward to future research findings.

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. 3524-32-1 name is 5-Amino-1,3-dimethylpyrazole, 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. 3524-32-1

A) 4-Bromo-1,3-dimethyl-1H-pyrazol-5-amine To a solution of 1,3-dimethyl-1H-pyrazol-5-amine (8.77 g) in ethyl acetate (180 mL), N-bromosuccinimide (14.75 g) was added under ice cooling, and the mixture was stirred at room temperature for 2 hours in a nitrogen atmosphere. The reaction mixture was diluted with a saturated aqueous solution of sodium bicarbonate, followed by extraction with ethyl acetate. The extract was washed with a saturated aqueous solution of sodium bicarbonate and saturated brine and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (NH, ethyl acetate/hexane) to obtain the title compound (12.6 g). MS: [M+H]+ 189.9

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 5-Amino-1,3-dimethylpyrazole, and friends who are interested can also refer to it.