Pyridine-derivatives

Application of 69045-78-9, 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 69045-78-9, name is 2-Chloro-5-(trichloromethyl)pyridine. This compound has unique chemical properties. The synthetic route is as follows.

Example 2 In a 119.5 cc autoclave equipped with a magnetic stirrer, 2-chloro-5-trichloromethylpyridine (11.5 g), ethanol (20 g), Raney nickel (1.15 g) and a 40% aqueous solution of methylamine (27.2 g) were charged. Hydrogen gas was introduced into the autoclave to a pressure of 10 Kg/cm2, and an internal temperature was raised to 45 C. At the same temperature, the hydrogen gas was supplied under a hydrogen pressure of 7 to 13 Kg/cm2. The absorption of hydrogen ceased after 95 minutes from the start of hydrogen supply. After completion of reaction, the autoclave was cooled down to room temperature, and the catalyst was filtrated off from the reaction mixture. The filtrate was adjusted to pH 12.9 with a 48% aqueous solution of sodium hydroxide and the filtrate was concentrated. Water was added to concentrate, and the product was extracted with toluene twice. After phase separation, the toluene layer was concentrated to obtain a concentrate (4.9 g) containing 2-chloro-5-methylaminomethylpyridine, which was analyzed by gas chromatography to find that a yield of 2-chloro-5-methylaminomethylpyridine was 45%.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 69045-78-9, 2-Chloro-5-(trichloromethyl)pyridine.

Reference:
Patent; Koei Chemical Co., Ltd.; US5424437; (1995); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 97004-04-1, (6-Chloropyridin-3-yl)methanamine, 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, Recommanded Product: (6-Chloropyridin-3-yl)methanamine, blongs to pyridine-derivatives compound. Recommanded Product: (6-Chloropyridin-3-yl)methanamine

A mixture of 3-ethoxy-2-(4-trifluoromethylphenyl hydrazono) propionic acid (0.3 g, 1 mmol), 5-aminomethyl-2-chloropyridine (0.21 g, 1.5 mmol), 1-[3-(dimethylamino) propyl]-3-ethylcarbodiimide hydrochloric acid salt (0.29 g, 1.5 mmol) and chloroform (10 ml) was left at room temperature overnight. The mixture was extracted with chloroform, washed 1 N hydrochloric acid, a saturated sodium bicarbonate water and a saturated brine, dried on anhydrous sodium sulfate and then filtered. The residue obtained by concentrating the resulting filtrate was purified with a silica gel chromatography to obtain N-(6-chloro-3-pyridylmethyl)-3-ethoxy-2-(4-trifluoromethylphenyl hydrazono) propionic acid amide (Compound No. 170) (0.3 g, 0.72 mmol, 72%). Compound No. 170: mp 98-99C; 1H NMR (400 MHz, CDCl3) delta 1.20 (3H, t), 3.57 (2H, q), 4.36 (2H, s), 4.51 (2H, d), 6.22 (2H, d), 7.33 (1 H, d), 7.37 (1 H, d), 7.52 (2H, d), 7.52 (2H, d), 7.64 (1H, dd), 7.85 (1 H, brt).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,97004-04-1, (6-Chloropyridin-3-yl)methanamine, and friends who are interested can also refer to it.

Reference:
Patent; Nihon Nohyaku Co., Ltd.; EP1470752; (2004); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 18699-87-1, 2-Methyl-3-nitropyridine, 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, 18699-87-1, blongs to pyridine-derivatives compound. Recommanded Product: 18699-87-1

Under nitrogen atmosphere, 47.6 g of 2-chloro-3-nitropyridine was dissolved in 500 mL of tetrahydrofuran, and 150 mL of 2M methylzinc chloride in tetrahydrofuran and 6.9 g of tetrakis(triphenylphosphine)palladium(0) were added, and the reaction solution was stirred at 70C for 2 hours. The reaction solution was poured into cold water, extracted with ethyl acetate, washed with water, and dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was subjected to column chromatography (n-hexane:ethyl acetate =3:1) to obtain 35.4 g of 2-methyl-3-nitropyridine as a colorless oil. Then 35.4 g of 2-methyl-3-nitropyridine was dissolved in a mixed solution of 300 mL methanol/5 mL triethylamine, added with 5 g of 10% palladium on carbon, and stirred for 6 hours under hydrogen atmosphere and at normal temperature and pressure. The reaction solution was filtered thorough Celite, the solvent was evaporated, and 33.0 g of crudely produced 2-methyl-3-aminopyridine was obtained as a pale brown oil. Next, to 100 mL of a solution of 65 g of crude 3-amino-2-methyl pyridine in dichloromethane were added 60 mL of pyridine and 71 mL of acetic anhydride at room temperature and stirred for 3 hours. The reaction solution was added with about 150 mL of silica gel powder, the solvent was evaporated, and the residue was purified by silica gel column chromatography (ethyl acetate :methanol =100:3), to afford 74 g of the title compound as colorless crystals.1H-NMR (400 MHz, CDCl3) delta2.25 (3H, s), 2.53 (3H, s), 7.00 (1H, bs), 7.18 (1H, dd, J = 4.6, 8.0 Hz), 8.23 (1H, d, J = 8.0 Hz), 8.30 (1H, d, J = 4.6 Hz).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,18699-87-1, its application will become more common.

Reference:
Patent; Eisai Co., Ltd.; EP1510516; (2005); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 179687-79-7, 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 179687-79-7, name is 2-((2-Chloro-4-nitrophenoxy)methyl)pyridine. This compound has unique chemical properties. The synthetic route is as follows.

Example 71; 4-f [3-chloro-4-(pyridin-2-ylmethoxy)phenyl]amino) [1]benzothieno[2,3-d] pyrimidin-7-ol; Step 1. Preparation of 3-Chloro-4-(pyridin-2-ylmethoxy)-phenylamine; EPO 2-chloro-4-nitro phenol (10 g, 57.6 mmol, 1 equiv), 2-pycolyl chloride hydrogen chloride (9.45 g, 57.6 mmol, 1 equiv) cesium carbonate 41.3 (126.8 mmol, 2.2 equiv) and sodium iodide (8.64 g, 57.6 mmol, 1 equiv) were suspended in 200 mL acetonitrile. The reaction mixture was stirred at 60C for 5h. The resulted suspension was filtered and washed with water (400 mL), yielding 2-(2-chloro-4- nitro-phenoxymethyl)-pyridine (8 g, 52%) as a red solid.2-(2-chloro-4-nitro-phenoxyrnethyl)-pyridine (8 g, 30.2mmol, 1 equiv) and iron (8.44 g, 151.1 mmol, 5 equiv) were mixed in acetic acid (100 mL ) and EtOAc (50 mL ) and were stirred at rt overnight. The reaction mixture was filtered through a pad of Celite. The filtrate was concentrated in vacuo and neutralized with saturated Na2CO3 solution. The solution was extracted with EtOAc and the organic layer was washed with brine and concentrated in vacuo. The resulting crude material was purified by flash chromatography eluting with EtOAc/hexane (3:7) to give 3-Chloro- 4-(pyridin-2-ylmethoxy)-phenylamine (3.2 g, 52%) as a white solid. 1H-NMR (CDCl3) delta 5.18 (s, 2H), 6.50 (dd, 1H), 6.76 (d, 1H),. 6.80 (d, 1H), 7.22 (m, 1H), 7.64 (d, 1H), 7.73 (td, 1H), 8.55 (m, 1H); LCMS RT = 0.89 min, [M+H]+ = 235.1.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 179687-79-7, 2-((2-Chloro-4-nitrophenoxy)methyl)pyridine.

Reference:
Patent; BAYER PHARMACEUTICALS CORPORATION; WO2006/44524; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 639091-75-1, In the chemical reaction process,reaction time,type of solvent,can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product.An updated downstream synthesis route of 639091-75-1 as follows.

Compound 2F: tert-butyl (4-(hydroxymethyl)pyridin-2-yl)carbamateCompound 2E (2.5 g, 9.91 mmol, 1.00 equiv) and CaC12 (1.65 g) were dissolved in EtOH (30 mL). The solution was cooled to 0C then NaBH4 (1.13 g, 29.87 mmol, 3.01 equiv) was gradually added. The solution was left under agitation overnight atambient temperature then the reaction was halted with the addition of water (50 mL). The mixture was extracted three times with 20 mL of EtOAc. The organic phases were combined, washed twice with 20 mL of NaC1 (sat.) then dried over sodium sulfate, filtered and concentrated under reduced pressure to yield 2.0 g (90 %) of compound 2F in the form of a colourless solid.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,639091-75-1, its application will become more common.

Reference:
Patent; PIERRE FABRE MEDICAMENT; RILATT, Ian; PEREZ, Michel; GOETSCH, Liliane; BROUSSAS, Matthieu; BEAU-LARVOR, Charlotte; HAEUW, Jean-Francois; CHAMPION, Thierry; ROBERT, Alain; WO2015/162291; (2015); 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. 1796-84-5, name is 4-Ethoxy-3-nitropyridine, the common compound, a new synthetic route is introduced below. Formula: C7H8N2O3

Example 82; 3-(2-Butynyl-1-methyl-4-piperazin-1-yl-1,3-dihydroimidazo[4.5-c]pyridin-2-one; 82a) Methyl-(3-nitro-pyridin-4-yl)amine; [] 4-Ethoxy-3-nitropyridine (10.0 g) was dissolved in a 40% methanol solution of methyl amine (100 mL), and this was heated at 80C for 60 hours. The solution was cooled, ethyl acetate (500 mL) was added, and the organic layer was washed twice with 300 mL of water and once with 300 mL of saturated aqueous sodium chloride solution. This was then dried over anhydrous magnesium sulfate. The solution was filtered, and concentrated under reduced pressure to give the title compound (7.00 g).

The synthetic route of 1796-84-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Eisai Co., Ltd.; EP1568699; (2005); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 1227002-03-0, Methyl 2-amino-5-chloroisonicotinate, 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, Recommanded Product: Methyl 2-amino-5-chloroisonicotinate, blongs to pyridine-derivatives compound. Recommanded Product: Methyl 2-amino-5-chloroisonicotinate

The reaction with methyl 2-amino-5-chloroisonicotinate takes place analogously to the reaction procedure in Example (Ik-127) using: 601 mg (3.21 mmol) of methyl 2-amino-5-chloroisonicotinate in 28.0 ml of dichloromethane, 1064 mg (3.21 mmol) of 1-methyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazole-5-carbonyl chloride, 431 mg of silver(I) cyanide in 28.0 ml of acetonitrile. The remaining residue is purified by means of column chromatography on silica gel using the eluent mixture cyclohexane:acetone (gradient). This gives 563 mg of methyl 5-chloro-2-({[1-methyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazol-5-yl]carbonyl}amino)-isonicotinate (36%).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1227002-03-0, Methyl 2-amino-5-chloroisonicotinate, and friends who are interested can also refer to it.

Reference:
Patent; Bayer CropScience AG; US2011/301181; (2011); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 29241-60-9, 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. 29241-60-9, name is 5-Bromo-2-chloro-3-methylpyridine, molecular formula is C6H5BrClN, 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.

[1120] To a solution of NaOMe (5.29 g, 98 mmol) in MeOH (500 mL) was added XLV1 (10 g, 49 mmol) by portionwise. The reaction mixture was heated to reflux overnight. The solution was cooled, quenched with water slowly, extracted with PE (100 mL x3). The combined organic layer was washed with brine and concentrated to give XLV-2 (8.0 g, 81% yield) as a white solid.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 29241-60-9, 5-Bromo-2-chloro-3-methylpyridine.

Reference:
Patent; INTERMUNE, INC.; RAMPHAL, Johnnie, Y.; BUCKMAN, Brad, Owen; EMAYAN, Kumaraswamy; NICHOLAS, John, Beamond; SEIWERT, Scott, D.; WO2015/153683; (2015); 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 380380-64-3, name is 5-Bromo-2-(2-methyl-2H-tetrazol-5-yl)pyridine. This compound has unique chemical properties. The synthetic route is as follows. Product Details of 380380-64-3

Under nitrogen protection, 5.44 g of 3-fluoro-4-bromophenylcarbamic acid benzyl ester, 67 mL of dioxane and 5.76 g of hexabutylditin are added,Dichlorobistriphenylphosphine palladium 0.93g. Stir at 10 C to 15 C for 2 hours to 3 hours, filter and wash with dioxane to obtain a tributyltin intermediate in dioxane solution.The dioxane solution of the tributyltin intermediate is stirred at 35 C to 45 C, and 2-methyl-5- (5-bromopyridin-2-yl) tetrazolium 4.23g, potassium phosphate 2.09g, tetrakis ( Triphenylphosphine) palladium 0.083g, heated to 75 C-85 C and stirred for 3 hours to 4 hours. After cooling, filter 6g of diatomaceous earth, add 40mL of ethyl acetate and 15% saline (the mass concentration refers to the mass of sodium chloride as a percentage of the total mass of saline), and separate the organic phase Dry, concentrate in vacuum (temperature 35 C- 65 C , pressure -0.08MPa -0.1MPa), add ethyl acetate 26mL, heat to 70 C-75 C , stir for 0.5 hours 1 hour, cool to 0 C- 10 C, stir 1 Hours to 2 hours, filtered, rinsed with ethyl acetate 12mL three times, the wet product was dried in a vacuum (pressure -0.01MPa ~ -0.1MPa) drying oven at 45 C to 55 C for 8 hours to 12 hours, to obtain an off-white solid as tedizolid phosphate intermediate II 2.91g, total yield 42.9%, HPLC purity 97.18%.

With the rapid development of chemical substances, we look forward to future research findings about 380380-64-3.

Reference:
Patent; Shanghai Bozhi Yan Xin Pharmaceutical Co., Ltd.; Chen Jian; Liu Zhenfeng; Ying Shuhuan; (16 pag.)CN110804038; (2020); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 124236-37-9, Adding some certain compound to certain chemical reactions, such as: 124236-37-9, name is Methyl 5-(trifluoromethyl)picolinate,molecular formula is C8H6F3NO2, 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 124236-37-9.

b) 1 -Oxy-5-trifluoromethyl-pyridine-2-carboxylic acid methyl ester A mixture of 5-(trifluoromethyl)-pyridine-2-carboxylic acid methyl ester (2.7 g, 13 mmol) and m-CPBA (CAN 937-14-4, 6.7 g, 39 mmol) in dry methylene chloride (30 mL) was stilTed under reflux conditions overnight. Removal of the solvent in vacuo and purification of the obtained residue by column chromatography (silica gel, 15 g, 20% ethyl acetate in petroleum ether) provided the title compound (2.2 g, 76%) as light-yellow solid; MS (El):mle = 222.1 [MHi.

According to the analysis of related databases, 124236-37-9, the application of this compound in the production field has become more and more popular.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; FREI, Beat; GOBBI, Luca; GRETHER, Uwe; KIMBARA, Atsushi; NETTEKOVEN, Matthias; ROEVER, Stephan; ROGERS-EVANS, Mark; SCHULZ-GASCH, Tanja; WO2014/86705; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem