Pyridine-derivatives

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. 179687-79-7, name is 2-((2-Chloro-4-nitrophenoxy)methyl)pyridine, the common compound, a new synthetic route is introduced below. Formula: C12H9ClN2O3

A mixture of 2-((2-chloro-4-nitrophenoxy)methyl)pyridine (26.5 g, 0.10 mol, 1.00 equiv), iron powder (25.2 g, 0.43 mol, 4.28 equiv) and ammonium chloride (72.24 g, 1.35 mol, 13.5 equiv) in ethanol (600 ml) was stirred mechanically under refluxed for 2 hours. The reaction was allowed to cool down; the mixture of the reaction was filtered and the filtrate was taken to dryness in vacuum. The resulted solid was dissolved in methylene chloride (500 ml) and filtered. Removal of the solvent from the filtrate in vacuum gave 15.3 g of the product. MS (ESI) m/z: 235 (M+l).

The synthetic route of 179687-79-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MEDOLUTION LIMITED; ZHANG, Dawei; WO2010/151710; (2010); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 863878-22-2, name is 6-Chloro-4-methyl-3-nitropyridin-2-amine. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C6H6ClN3O2

2-Amino-6-chloro-4-methyl-3-nitropiridine (1.2 g, 6.40 mmol) synthesized according to the method described in WO98/02442 was dissolved in ethanol (65 mL), and tin(II) chloride dihydrate (4.33 g, 19.2 mmol) was added, followed by stirring at 75C for 2 hours. The reaction mixture was diluted with ethyl acetate and was added with 3 mol/L aqueous sodium hydroxide solution. The unsoluble material was filtered out through Celite, and washed with ethyl acetate. The filtrate was sequentially washed with water, saturated brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Next, polyphosphoric acid (15.3 g) and acetic acid (1.72 mL, 30.0 mmol) was added to the residue, and was stirred for 80C for 3 hours. The reaction mixture was moved to ice water and sodium carbonate (11.4 g, 0.108 mol) was added in a little portion while stirring. Then, 28% aqueous ammonia solution was added to the residue to control the pH to 9 and the mixture was stirred for 1 hour. Precipitated crude crystals were collected by filtration, and werewashed with water, and the obtained crystals were dried in vacuo at 40C overnight to obtain Compound P38 (395 mg, 34%). ESI-MS: m/z 182 [M + H]+ 1H NMR (DMSO-d6)delta(ppm): 2.49 (s, 3H), 3.33 (s, 3H), 7.07 (s, 1H), 12.74 (brs, 0.5H), 12.76 (brs, 0.5H).

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, 863878-22-2, 6-Chloro-4-methyl-3-nitropyridin-2-amine.

Reference:
Patent; KYOWA HAKKO KOGYO CO., LTD.; EP1724271; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 868551-30-8, name is Methyl 4-methyl-5-nitropicolinate, the common compound, a new synthetic route is introduced below. HPLC of Formula: C8H8N2O4

Methyl 4-[(1E)-2-(dimethylamino)ethenyl]-5-nitro-2-pyridinecarboxylate (0628) (0629) 86.4 g (0.73 mmol) of 18 N,N-dimethylformamide O,O-dimethyl acetal were added to a solution of 65 g (0.33 mol) of 19 methyl 5-methyl-6-nitro-3-pyridinecarboxylate (Y. Morisawa et al., J. Med. Chem. 21, 194-199, 1978) in 415 ml of 20 N,N-dimethylformamide. The reaction mixture was then stirred at 90 C. for 6 hours. The solvent was then removed under reduced pressure and the residue that remained was purified by column chromatography. This gave 56 g (yield 66.7% of theory) of 21 methyl 4-[(1E)-2-(dimethylamino)ethenyl]-5mitro-2-pyridinecarboxylate.

The synthetic route of 868551-30-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Bayer CropScience Aktiengesellschaft; JESCHKE, Peter; ARLT, Alexander; CEREZO-GALVEZ, Silvia; VOERSTE, Arnd; FUESSLEIN, Martin; FISCHER, Reiner; BRETSCHNEIDER, Thomas; ILG, Kerstin; MALSAM, Olga; LOESEL, Peter; GOERGENS, Ulrich; (74 pag.)US2017/325458; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 96630-88-5, 4-Chloro-3-hydroxypyridine, 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, 96630-88-5, blongs to pyridine-derivatives compound. Safety of 4-Chloro-3-hydroxypyridine

This compound was reacted with NaH in DMSO at 50, the reaction mixture cooled and treated with 4-nitrobenzyl bromide for 1 hour. The reaction mixture was worked up with water and ether and the product treated with HCl/ether to give 4-chloro-3-(4-nitrobenzyloxy)pyridine hydrochloride.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,96630-88-5, its application will become more common.

Reference:
Patent; ICI Pharma; US4678781; (1987); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 884494-45-5, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 884494-45-5, name is 2-Fluoro-4-iodo-6-methylpyridine. This compound has unique chemical properties. The synthetic route is as follows.

A mixture of 2-fluoro-4-iodo-6-methylpyridine (400 mg) and 28% aqueous ammonia solution (2.8 mL) was stirred under microwave irradiation at 135C for 6 hr. The reaction mixture was cooled to room temperature, and the precipitate was collected by filtration and washed with water to give the title compound (343.4 mg). MS: M+1 235.0

According to the analysis of related databases, 884494-45-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Takeda Pharmaceutical Company Limited; HIRAYAMA, Takaharu; HIRATA,Yasuhiro; TOMINARI, Yusuke; IWAMURA, Naoki; SASAKI, Yusuke; ASANO, Moriteru; TAKAGI, Terufumi; OKANIWA,Masanori; YOSHIDA, Masato; IMAMURA, Shinichi; (64 pag.)EP3514150; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 178876-83-0 ,Some common heterocyclic compound, 178876-83-0, molecular formula is C7H7BrN2O2, 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 degassed solution of methyl 6-amino-5-bromopyridine-2-carboxylate (1.06 g), ethyl acrylate (2.49 ml), tri-o-tolylphosphine (280 mg), triethylamine (3.18 ml) in dimethylformamide (50 ml) was added tris (dibenzylideneacetone) palladium (0) (211 mg) and the resultant solution was heated at 50C for 72h. After stirring overnight, the mixture was evaporated and the residue treated with dichloromethane (50 ml) and washed with H20. The aqueous fraction was re-extracted with 10% methanol in dichloromethane and the combined organic fractions dried (MgS04) and evaporated. Chromatography of the residue (60-80 petroleum ether-ethyl acetate 4: 1) gave the product (360 mg, 31 %). MS (+ve ion electrospray) m/z 251 (MH+, 100%)

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,178876-83-0, its application will become more common.

Reference:
Patent; SMITHKLINE BEECHAM P.L.C.; WO2003/87098; (2003); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 884495-00-5, name is 4-Bromo-5-fluoro-2-methoxypyridine. This compound has unique chemical properties. The synthetic route is as follows. name: 4-Bromo-5-fluoro-2-methoxypyridine

Example A.18 Preparation of [0214] [0215] All apparatus was flushed with N2 and dried by heating. Reaction under Ar flow. Intermediate (8) (0.00187 mol) was dissolved in degassed TFA (15 ml), then stirred for 4 hours at 85 C. The mixture was cooled. The solvent was evaporated in vacuo. The residue was taken up into degassed toluene. The organic layer was separated, washed with a degassed aqueous NaHCO3 solution (2×50 ml), dried, filtered and the solvent was evaporated in vacuo to give a yellow foam (*). Under Ar, 4-bromo-5-fluoro-2-methoxypyridine (1.3 equiv.; 0.500 g) was dissolved in degassed dioxane (10 ml). Cs2CO3 (0.914 g) was added to give suspension (**). A solution of the crude residual oil (*) in degassed dioxane (10 ml) was added to the suspension (**). Then, Pd2(dba)3 (0.029 g) and Xantphos (0.032 g) were added. The resultant brown reaction suspension was stirred overnight at 100 C. The reaction mixture was cooled, and the solvent was evaporated. The residue was dissolved in ethyl acetate, then washed with an aqueous NaHCO3 solution, and once with brine. The organic layer was separated, dried, filtered and the solvent was evaporated. The residue was purified by column chromatography over silica gel. The product fractions were collected and the solvent was evaporated, yielding 0.5113 g of intermediate (40).

With the rapid development of chemical substances, we look forward to future research findings about 884495-00-5.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; Gijsen, Henricus Jacobus Maria; De Cleyn, Michel Anna Jozef; Surkyn, Michel; Verbist, Bie Maria Pieter; US2013/324529; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 709652-82-4, name is 2-Amino-5-bromonicotinonitrile. A new synthetic method of this compound is introduced below., Safety of 2-Amino-5-bromonicotinonitrile

6-bromo-2-(4-(dimethyIamino)phenyl)indolizine-8-carbonitrile (L14).; 2-Bromo-l-(4-(dimethylamino)phenylethanone (11) (1.21 g; 5.00 mmol) and 2-amino-5- bromonicotinonitrile (7j) (1.03 g; 5.2 mmol) were used to give 12j (0.77 g; yield 45 %); mp: 240-246 0C; 1H NMR (400 MHz, DMSO-J6) delta 9.12 (d, 4JHH = 1.8 Hz, IH, Ar-H), 8.32 (s, IH, Ar-H), 8.13 (d, 4JHH = 1.8 Hz, IH, Ar-H), 7.81 (d, 3JHH= 8.9 Hz, 2H, Ar-H), 6.79 (d, 3JHH = 8.9 Hz, 2H, Ar-H), 2.96 (s, 3H, CH3). 13C NMR (100 MHz, DMSO-J6) delta 150.6, 147.4, 141.3, 133.6, 131.1, 127.0 (s, 2C, Ar), 119.9, 114.8, 112.1 (s, 2C, Ar), 109.0, 103.5, 99.9, 39.9 (s, 2C, NCH3). m/z (ES-MS): 443.9 (4%), 441.9 (3%), 344.0 (11%), 343.0 (98%), 342.0 (11%), 341.0 (100%, [M+H]+). HRMS m/z (TOF+): CaIc. C16Hi4N4Br = 341.0402. Found: 341.0389. Error (ppm): – 3.8.

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, 709652-82-4, 2-Amino-5-bromonicotinonitrile.

Reference:
Patent; THE GOVERNMENT OF THE UNITED STATES, as represented by the secretary of HEALTH AND HUMAN SERVICES; WO2007/124345; (2007); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 1254473-66-9, name is 1-(3,5-Dichloropyridin-4-yl)ethanol, molecular formula is C7H7Cl2NO, The 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. Safety of 1-(3,5-Dichloropyridin-4-yl)ethanol

Separate the mixture of stereoisomers obtained in Preparation 1 on a CHIRALPAK AD-H column eluting with 90% heptanes/10% ethanol. Peak 2 is the desired enantiomer. To establish the absolute configuration dissolve a sample of the product in CDCl3 (final concentration 100 mg/mL). Obtain the vibrational circular dichroism (VCD) and infra red (IR) spectra with a resolution of 4 cm-1 using a ChiralIR FT VCD spectrometer (BioTools Inc) with an IR cell equipped with BaF2 windows and a path length of 100 mm. Collect the VCD and IR for 6 hours with 150 muL of the sample. Present the data without smoothing or further data processing. Obtain vibrational frequencies and absorption and VCD intensities by optimizing the lowest energy conformer by Gaussian at the B3PW91/6-31G** level on a Linux cluster, and simulate the corresponding spectra using a Lorentzian bandwidth of 6 cm-1 vibrational circular dichroism. The above analysis shows the product to be the S-isomer. Yield: 84.37 g (27%). MS (ES) m/z 192 [M+1]+.

With the rapid development of chemical substances, we look forward to future research findings about 1254473-66-9.

Reference:
Patent; ELI LILLY AND COMPANY; US2012/83511; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 33252-28-7, 6-Chloronicotinonitrile, 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, Product Details of 33252-28-7, blongs to pyridine-derivatives compound. Product Details of 33252-28-7

Reference example 13:; 2-Amino-N-(5-cyano-2-pyridyl)-2-methylpropylamine[0216] To a solution of 6-chloronicotinonitrile (3.50 g, 25.3 mmol) in 1,4-dioxane (10 mL) were added potassium carbonate (5.24 g, 37.9 mmol) and 1,2-diamino-2-methylpropane (3.97 mL, 37.9 mmol), and the mixture was refluxed for 4 hours. The reaction mixture was, concentrated and crystals were allowed to precipitate. The deposited crude crystals were washed with toluene to obtain the title compound (4.03 g, 21.2 mmol) as white crystals.yield: 84%APCIMS (m/z): 191 (M + H)<+>

The synthetic route of 33252-28-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; KYOWA HAKKO KOGYO CO., LTD.; EP1354882; (2003); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem