Sep-21 News Extended knowledge of 15802-80-9

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 15802-80-9, name is 3-(tert-Butyl)pyrazole, A new synthetic method of this compound is introduced below., Product Details of 15802-80-9

Sodium hydride (60% suspension in oil, 0.12 g, 3.0 mmol) was washed with hexane, dried under nitrogen and resuspended in dry dimethylformamide (10 mL). 3-tert-butylpyrazole (0.20 g, 1.6 mmol) was added in one portion at ambient temperature, and the stirring was continued until the gas evolution subsided. The (5,11-dihydro-pyrido [2,3-b] [1,5] benzodiazepin-6-yl)- [4-fluoro-2-trifluoromethylphenyl]-methanone of Example 4, Step B (0.50 g, 1.3 mmol) was added in one portion to the clear solution. The mixture was placed in an oil bath (preheated at 130C) for 30 minutes and then heated at reflux for 5 hours. After cooling, the mixture was partitioned between water and ethyl acetate. The organic extracts were dried over sodium sulfate and evaporated to dryness. The crude residue was dissolved in dichloromethane and absorbed onto a silica Merck-60 flash column. Elution with 25% ethyl acetate in hexane provided the title product (0.23 g, 36.0%) as a foam which crystallized by trituration with hexane-ether, m.p. 136-140C. NMR (DMSO-d6, 400 MHz): delta 1.26 (s, 9H, C(CH3)3), 4.17 and 5.45 (dd, 2H, CONCH2), 6.47 (m, 1H, pyrazole CH), 6.54 (m, 1H), 6.68 (m, 1H), 6.80 (m, 1H), 7.00 (m, 1H), 7.28 (m, 1H), 7.60 (m, 1H), 7.87 (m, 1H), 8.04 (m, 1H), 8.13 (m, 1H), 8.47 (m, 1H, pyrazole CH), 9.62 (s, 1H, NH) MS (EI, m/z): 491 [M]+ Anal. Calc’d for C27H24F3N5O: C 65.98, H 4.92, N 14.25. Found: C 65.75, H 4.92, N 13.95

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Wyeth; EP1000059; (2004); B1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

September 17, 2021 News Discovery of 15802-80-9

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-(tert-Butyl)pyrazole, and friends who are interested can also refer to it.

Adding a certain compound to certain chemical reactions, such as: 15802-80-9, name is 3-(tert-Butyl)pyrazole, 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 15802-80-9, Product Details of 15802-80-9

Reference Production Example 3-2 3-t-butyl-1H-pyrazole-1-ylmethanol The mixture of 1.28 g of 3-t-butyl-1H-pyrazole, 0.66 g of paraformaldehyde and 0.3 g of triethylamine was stirred at 130 C for 7 hours. After the reaction mixture was cooled to room temperature, acetone was added to the reaction mixture. The mixture was filtered. The filterate was concentrated under reduced pressure. Hexane was added to the residue, and then crystalline was formed. The crystalline was collected to obtain 1.07 g of 3-t-butyl-1H-pyrazole-1-ylmethanol. 1H-NMR(CDCl3,TMS,delta(ppm)):1.28(9H,s),5.50(2H,s),6.13(1H,s),7.46 (1H, s)

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-(tert-Butyl)pyrazole, and friends who are interested can also refer to it.

Reference:
Patent; Sumitomo Chemical Company, Limited; EP1710234; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Discovery of C7H12N2

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-(tert-Butyl)pyrazole, and friends who are interested can also refer to it.

Adding a certain compound to certain chemical reactions, such as: 15802-80-9, name is 3-(tert-Butyl)pyrazole, 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 15802-80-9, Product Details of 15802-80-9

Reference Production Example 3-2 3-t-butyl-1H-pyrazole-1-ylmethanol The mixture of 1.28 g of 3-t-butyl-1H-pyrazole, 0.66 g of paraformaldehyde and 0.3 g of triethylamine was stirred at 130 C for 7 hours. After the reaction mixture was cooled to room temperature, acetone was added to the reaction mixture. The mixture was filtered. The filterate was concentrated under reduced pressure. Hexane was added to the residue, and then crystalline was formed. The crystalline was collected to obtain 1.07 g of 3-t-butyl-1H-pyrazole-1-ylmethanol. 1H-NMR(CDCl3,TMS,delta(ppm)):1.28(9H,s),5.50(2H,s),6.13(1H,s),7.46 (1H, s)

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-(tert-Butyl)pyrazole, and friends who are interested can also refer to it.

Reference:
Patent; Sumitomo Chemical Company, Limited; EP1710234; (2006); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Extended knowledge of 15802-80-9

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 15802-80-9, name is 3-(tert-Butyl)pyrazole, A new synthetic method of this compound is introduced below., Product Details of 15802-80-9

Sodium hydride (60% suspension in oil, 0.12 g, 3.0 mmol) was washed with hexane, dried under nitrogen and resuspended in dry dimethylformamide (10 mL). 3-tert-butylpyrazole (0.20 g, 1.6 mmol) was added in one portion at ambient temperature, and the stirring was continued until the gas evolution subsided. The (5,11-dihydro-pyrido [2,3-b] [1,5] benzodiazepin-6-yl)- [4-fluoro-2-trifluoromethylphenyl]-methanone of Example 4, Step B (0.50 g, 1.3 mmol) was added in one portion to the clear solution. The mixture was placed in an oil bath (preheated at 130C) for 30 minutes and then heated at reflux for 5 hours. After cooling, the mixture was partitioned between water and ethyl acetate. The organic extracts were dried over sodium sulfate and evaporated to dryness. The crude residue was dissolved in dichloromethane and absorbed onto a silica Merck-60 flash column. Elution with 25% ethyl acetate in hexane provided the title product (0.23 g, 36.0%) as a foam which crystallized by trituration with hexane-ether, m.p. 136-140C. NMR (DMSO-d6, 400 MHz): delta 1.26 (s, 9H, C(CH3)3), 4.17 and 5.45 (dd, 2H, CONCH2), 6.47 (m, 1H, pyrazole CH), 6.54 (m, 1H), 6.68 (m, 1H), 6.80 (m, 1H), 7.00 (m, 1H), 7.28 (m, 1H), 7.60 (m, 1H), 7.87 (m, 1H), 8.04 (m, 1H), 8.13 (m, 1H), 8.47 (m, 1H, pyrazole CH), 9.62 (s, 1H, NH) MS (EI, m/z): 491 [M]+ Anal. Calc’d for C27H24F3N5O: C 65.98, H 4.92, N 14.25. Found: C 65.75, H 4.92, N 13.95

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Wyeth; EP1000059; (2004); B1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

The important role of 3-(tert-Butyl)pyrazole

According to the analysis of related databases, 15802-80-9, the application of this compound in the production field has become more and more popular.

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. 15802-80-9, name is 3-(tert-Butyl)pyrazole, This compound has unique chemical properties. The synthetic route is as follows., Safety of 3-(tert-Butyl)pyrazole

Reference Example 274 To a mixture of3-tert-butyl-lH-pyrazole (3.72 g), 2-chloro-5- (trifluoromethyl) pyridine (5.45 g) and N- methylpyrrolidone (18.6 ml) was added sodium hydroxide (1.80 g) while stirring the mixture at room temperature. After allowing reaction as it was for 8 hours, water (38 ml) and 6N hydrochloric acid (80 ml) were added and the mixture was extracted with ethyl acetate. The extract was washed with water and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography, and eluted with hexane and then with toluene to give2- (3-tert-butyl-lH-pyrazol-1-yl)-5-(trifluoromethyl) pyridine (7.04 g, yield87%) as a colorless oil. H-NMR (CDC13) 5 : 1.37 (9H, s), 6.37 (lH, d, J=2.6 Hz), 7.97 (1H, dd, J=8.7, 2.1 Hz), 8.08 (1H, d, J=8.7 Hz), 8.46 (1H, d, J=2.7 Hz), 8.6-8. 7 (1H, m).

According to the analysis of related databases, 15802-80-9, the application of this compound in the production field has become more and more popular.

The important role of 3-(tert-Butyl)pyrazole

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 15802-80-9, its application will become more common.

Some common heterocyclic compound, 15802-80-9, name is 3-(tert-Butyl)pyrazole, molecular formula is C7H12N2, 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: 15802-80-9

Part A – 4,5-Dibromo-3-tert-butylpyrazole Following the procedure of Example 30, Part A, but substituting 3-tert-butylpyrazole for 3-ethylpyrazole, there was prepared 4,5-dibromo-3tert-butylpyrazole with a melting point at 224 to 227 C. Analysis: Calc’d. for C7 H10 Br2 N2: C, 29.81; H, 3.57; N, 9.94. Found: C, 30.06; H, 3.68; N, 10.01.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 15802-80-9, its application will become more common.

Extracurricular laboratory: Synthetic route of 15802-80-9

The chemical industry reduces the impact on the environment during synthesis 3-(tert-Butyl)pyrazole. I believe this compound will play a more active role in future production and life.

Synthetic Route of 15802-80-9, 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. 15802-80-9, name is 3-(tert-Butyl)pyrazole, This compound has unique chemical properties. The synthetic route is as follows.

EXAMPLE 4 Preparation of 5-[3-(1,1-dimethylethyl)-1H-pyrazol-1-yl]-3-[3-(trifluoromethyl)phenyl]-4-oxazolidinone To a solution of 5-hydroxy-3-[3-(trifluoromethyl)phenyl]-4-oxazolidinone (1 g, 4.05 mmol) in tetrahydrofuran (20 mL) under nitrogen at ~0 C., were added 3-(1,1-dimethylethyl)-1H-pyrazole (0.5 g, 4.05 mmol), triphenylphosphine (1.23 g, 4.7 mmol) and diisopropyl azodicarboxylate (0.88 mL, 4.46 mmol). After the addition, the reaction mixture was allowed to warm up slowly to room temperature and stirred at room temperature overnight. The reaction mixture was then concentrated, and the residue was purified by column chromatography (silica gel, ~20% ethylacetate/80% hexanes) to give a crude product. The crude product was further purified by column chromatography (silica gel, ~20% ethyl acetate/~80% hexanes) to give the title compound, a compound of this invention, as a white solid (14 mg) melting at 95-98 C. 1H NMR (CDCl3): delta 1.26 (s, 9H), 5.57 (d, 1H), 5.79 (d, 1H), 6.08 (s, 1H), 6.20 (d, 1H), 7.45-7.6 (m, 3H), 7.8-7.9 (m, 2H).

The chemical industry reduces the impact on the environment during synthesis 3-(tert-Butyl)pyrazole. I believe this compound will play a more active role in future production and life.