Day: April 27, 2021

Related Products of 121507-34-4, A common heterocyclic compound, 121507-34-4, name is 5-Isopropoxy-1H-pyrazol-3-amine, molecular formula is C6H11N3O, 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 mixture of 2,3,6-tf chloro-5-nitropyridine (2.61 g, 11.4 mmol) and DIEA (1.90 ml, 11.4 mmol) in TEtaF (50 ml) was added the 5-isopropoxy-lH-pyrazol-3-amine (1.20 g, 8.50 mmol) at 0 0C. After addition, the reaction mixture was stirred at 25 0C for 5 days. The solvent was removed under reduced pressure and the resulting residue was purified by column chromatography (hexane-EtOAc = 2.5 : 1) to give the title compound as a yellow solid (0.77 g, 27%). 1H NMR (400 MHz) delta 12.26 & 11.64 (s, IH), 10.42 & 10.04 (s, IH), 8.81 & 8.77 (s, EPO IH), 6.02 & 5.94 (s, IH), 4.70 & 4.48 (m, IH)3 1.32 (d, J= 6.0 Hz, 3H)5 1.27 (d, J= 6.0 Hz, IH). MS: Calcd.: 331; Found: [MH-H]+ 332

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.

Related Products of 37718-11-9, 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. 37718-11-9, name is 1H-Pyrazole-4-carboxylic acid belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

To the mixture of 4-(4-methylpiperazin-1-yl)-2- (piperidin-1-yl)aniline (0.5 g, 1.82 mmol), 4-cyanofuran-2-carboxylic acid (0.3 g, 2.18 mmol), HATU (0.83 g, 2.18 mmol), in DMF (10 mL) was added DIPEA (0.63 mL, 3.64 mmol). The reaction mixture was stirred at room temperature overnight and then partitioned between EtOAc and brine. The organic layer was separated, dried over anhydrous MgSO4, filtered, and concentrated under a vacuum. The resulting residue was purified by silica gel column chromatography (CH2Cl2: MeOH = 9:1) to give 4-cyano-N-(4-(4-methylpiperazin-1-yl)-2-(piperidin-1-yl)phenyl)furan-2- carboxamide as a pale yellow solid (0.62 g, 86.1% yield).1H NMR (500 MHz, CDCl3) d 9.41 (s, 1H), 8.31 (d, J = 8.7 Hz, 1H), 8.03 (s, 1H), 7.33 (s, 1H), 6.78 (s, 1H), 6.72 (d, J = 8.8 Hz, 1H), 3.19 (s, 4H), 2.83 (s, 4H), 2.59 (s, 4H), 2.36 (s, 3H), 1.76 (s, 4H), 1.63 (s, 2H).

The synthetic route of 1H-Pyrazole-4-carboxylic acid has been constantly updated, and we look forward to future research findings.

Synthetic Route of 92933-47-6, 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. 92933-47-6, name is 5-Isopropyl-1H-pyrazole-3-carboxylic acid, This compound has unique chemical properties. The synthetic route is as follows.

General procedure: The aqueous solution of Eu(NO3)3.6H2O (1mmol) was treated with threefold excess of ethanolic solution of HIPA (3mmol) and the resulting mixture was thoroughly mixed on magnetic stirrer. The aqueous solution of NaOH was added drop wise to adjust the pH of mixture by 6-7. After constant stirring of 3 hr, off white precipitates of C1 binary complex were appeared which were isolated by vacuum filtration, washed with ethanol and water respectively, and then dried in desiccators.[19] Similarly, ternary complexes C2-C5 were synthesized by adding ethanolic solution of dmbipy, dipy, dmph and phen (1mmol) respectively, to the reaction mixture of europium(III) nitrate (1mmol) and ligand HIPA (3mmol) prior to adjustment of pH of the solution. Binary complex of gadolinium ion with ligand HIPA [Gd(IPA)3.2H2O] is synthesized by similar method as of C1 to calculate the triplet state of ligand. The synthetic routes of ligand HIPA and europium (III) complexes C1-C5 are shown in Fig. 1

The chemical industry reduces the impact on the environment during synthesis 5-Isopropyl-1H-pyrazole-3-carboxylic acid. I believe this compound will play a more active role in future production and life.

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. 70951-85-8, name is 4-Bromo-1-(tert-butyl)-1H-pyrazole, This compound has unique chemical properties. The synthetic route is as follows., category: pyrazoles-derivatives

Isopropyl magnesium chloride lithium chloride complex (1.3 M in THF, 28.4 mL, 37 mmol) was charged to a solution of 4-bromo-1-(tert-butyl)-1H-pyrazole (5.0 g, 25 mmol) in anhydrous THF (25 mL) under argon at ambient temperature. Anhydrous dioxane (3.3 g, 37 mmol) was charged to the reaction, and the reaction was agitated at 45 00 for 4 h. The resulting mixture was cooled to ambient temperature and charged to an anhydrous solution of acetic anhydride (7.5 g, 73 mmol) in THF (25 mL) at -20 00 The resulting mixture was warmed to ambient temperature and concentrated to a residue. The mixture was dissolved in methyl t-butyl ether (50 mL) and washed with water (25 mL). The organic portion was concentrated to provide crude 1-(1-(tert-butyl)-1H-pyrazol-4-yl)ethan-1-one as an oil (7.6 g, 36 wt%) and 67% yield. Crystallization in a mixture of methyl t-butyl ether and heptane provided analytically pure material 1 -(1 -(tert-Butyl)-1 H-pyrazol-4-yl)ethan-1 -one. NMR (500 MHz, ODd3) = 7.96 (s, 1 H), 7.86 (s, 1 H), 2.37 (s, 3H), 1.55 (s, 9H).

According to the analysis of related databases, 70951-85-8, the application of this compound in the production field has become more and more popular.

Reference of 31230-17-8, 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. 31230-17-8, name is 5-Methyl-1H-pyrazol-3-amine belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

A mixtureof 2, 4,6-trichloropyrimidine (1.00 g, 5. 46 mmol),3-amino-5-methyl-lH- pyrazole (530 mg, 5.46 mmol) and triethylamine (1.1 ml,8. 2 mmol) inEtOH (10 ml) was stirred at room temperature for 1 day. Solvent was removed and the mixture was partitioned between EtOAc and water. The organic layer was concentrated to give the desired product (1.34 g,quantitative). lH NMR (CDC13) :6 2.30(m, 3 H), 5.90 (m, 1 H), 7.85 (m, 1 H), 8.50 (br s,1 H).

The synthetic route of 5-Methyl-1H-pyrazol-3-amine has been constantly updated, and we look forward to future research findings.

Adding a certain compound to certain chemical reactions, such as: 63874-95-3, name is 1-Benzyl-1H-pyrazole-4-carbaldehyde, 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 63874-95-3, HPLC of Formula: C11H10N2O

General procedure: General procedure: To a solution of 4-formyl-1H-1-tritylprazole (8a) (94.6 mg, 0.28 mmol) inCH2Cl2 (6 mL) was added 70% mCPBA (131.8 mg, 0.53 mmol) at 0 C, with stirring. After 5 h,saturated NaHCO3 aq (10 mL) was added to quench the reaction mixture. The mixture was extractedwith CH2Cl2 3 times. Combined organic layer was dried over MgSO4, filtered, and condensedunder reduced pressure to give a crude formate. To an acetone solution of the crude formate (6 mL),20% NaOH aq (4 mL) was added, then the mixture was heated under reflux for 1 h, then crotyl bromide(48 L, 0.42 mmol) was added to the cooled mixture. After stirring for 3 h, saturated NH4Cl aq wasadded to the reaction mixture to quench, the mixture was condensed under reduced pressure, extractedwith CH2Cl2 for 3 times. The combined CH2Cl2 layer was dried over MgSO4, filtered, and condensedunder reduced pressure to give a crude residue, which was purified with flash column chromatography(EtOAc:Hexane = 1:10) to give 4-(2-butenyl)oxy-1H-1-tritylpyrazole (1e) (54.5 mg, 51%).

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

These common heterocyclic compound, 26621-44-3, name is 3-Nitro-1H-pyrazole, 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. category: pyrazoles-derivatives

To a solution of 3-nitro-lH-pyrazole (5.0g, 44.22mmol, l .Oeq) in tetrahydrofuran (50mL) was added sodium hydride (1.6g, 66.33mmol, 1.5eq) at 0C and reaction mixture was stirred for 30 min followed by 2-(Trimethylsilyl)ethoxym ethyl chloride (8.86g, 53.06mmol, 1.2eq) was added at the same temperature. The reaction mixture was allowed to come at room temperature and stirred for 24h. After completion of reaction, reaction mixture was transferred in to ice cold water and extracted with ethyl acetate. Organic layer was combined, washed with brine, dried over sodium sulphate and concentrated under reduced pressure to obtain crude material. This was further purified by column chromatography and compound was eluted on 15% ethyl acetate in hexane as eluent to obtain 185.1. (7.9g, 73.42%). MS(ES): m/z 244.34 [M+H]+

The synthetic route of 3-Nitro-1H-pyrazole has been constantly updated, and we look forward to future research findings.

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. 153912-60-8, name is 1,5-Dimethyl-1H-pyrazol-3-yl-methanol, A new synthetic method of this compound is introduced below., Formula: C6H10N2O

Preparation of 3-(chloromethyl)-l,5-dimethyl-lH-pyrazole hydrochloride: To (l,5-dimethyl-lH-pyrazol-3-yl)methanol (5.01 g, 39.71 mmol) in DCM (80 mL) at 0 C was cautiously added thionyl chloride (25 mL, 343.6 mmol). The cold bath was removed and the reaction mixture was stirred at ambient temperature for 3 hours. The reaction mixture was concentrated under reduced pressure to give crude product (7.32 g).

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.

Electric Literature of 1904-31-0,Some common heterocyclic compound, 1904-31-0, name is 1-Methyl-1H-pyrazol-3-amine, molecular formula is C4H7N3, 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.

Under the protection of nitrogen,The compound 1-methyl-1H-pyrazol-3-amine (200 mg, 2.06 mmol) was suspended in THF (5 mL).Then, CuI (431 mg, 2.27 mmol) and CH2I2 (0.5 mL, 6.18 mmol) were added thereto.Next addNitrosoisoamyl ester(8.30 mL, 61.78 mmol).The mixture was heated to reflux for 5 hours and then cooled to room temperature.Then diluted with EtOAc (15 mL).The resulting mixture was washed with aq. aq.Filtered through a silica gel pad,The filtrate was washed with saturated brine (10 mL).The organic phase was dried over anhydrous sodium sulfate and then evaporated.The residue was chromatographed on silica gel (EtOAc /EtOAcThe title compound was obtained as a yellow liquid (233 mg, 54.4%).

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

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. 5334-39-4, name is 3-Methyl-4-nitro-1H-pyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below. Safety of 3-Methyl-4-nitro-1H-pyrazole

A mixture of 3-methyl-4-nitro-lH-pyrazole ( 5 g, 39.34 rnmol), 2-bromoethanoi (9.83 g,78.68 mmol, 5.59 mL) and K2CO3 (16.31 g, 118.02 mmol) in CCN (50 mL) was degassed and purged with N2 for 3 times, and then the mixture was stirred at 80 C for 16 h under N2. The mixture was cooled to 20 C and concentrated under reduced pressure. The residue was poured into ice water (100 mL). The aqueous phase was extracted with EtOAc (3 chi 35 mL). The combined organic phase was washed with brine (35 mL), dried over anhydrous NaaSC^, filtered and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (PE:EtOAc = 2: 1), to give 2-(5-methyl-4-nitro-pyrazol- 1 -yl)ethanol and 2-(3-methyl-4-nitro-pyrazol-1-yl)ethanol as a yellow oil. LCMS: RT 0.161 min, m/z = 172.2 [M+H]~. -1 NMR (400 MHz, CDC13): delta 8.20 (s, 1 H), 8.03 (s, 1 H), 4.14 – 4.22 (rn, 4 H), 3.94 – 4.03 (m, 4 H), 3.07 (d, 1=5.27 Hz, 2 H), 2.64 (s, 3 H), 2.47 (s, 3 H).

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