Pyridine-derivatives

Reference of 99368-68-0, 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 99368-68-0, name is 6-Chloro-5-(trifluoromethyl)pyridin-3-amine. This compound has unique chemical properties. The synthetic route is as follows.

Reference Example 120 6-chloro-5-(trifluoromethyl)pyridine-3-sulfonyl chloride; Under ice-cooling, thionyl chloride (4 mL) was added dropwise over 20 min to water (27 mL). The mixture was stirred at room temperature for 12 hr to give a sulfur dioxide-containing solution. Separately, 6-chloro-5-(trifluoromethyl)pyridine-3-amine (1.14 g) was added to concentrated hydrochloric acid (9 mL) with stirring under ice-cooling, and concentrated hydrochloric acid (9 mL) was further added. A solution of sodium nitrite (0.44 g) in water (6 mL) was added dropwise over 10 min. The reaction mixture was gradually added at 5 C. to the above-mentioned sulfur dioxide-containing solution added with cuprous chloride (15 mg). Under ice-cooling, the mixture was further stirred for 30 min, and the precipitate was collected by filtration and washed with water. The obtained precipitate was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=19:1?9:1) to give the title compound as an orange solid (yield 437 mg, 27%). 1H-NMR (CDCl3) delta: 8.58 (1H, m), 9.18 (1H, m).

According to the analysis of related databases, 99368-68-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Takeda Pharmaceutical Company Limited; US2007/60623; (2007); 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. 637348-81-3, name is 3-Bromo-5-iodopyridin-2-ol, the common compound, a new synthetic route is introduced below. COA of Formula: C5H3BrINO

To a stirring suspension of 18 (see Example 4 above) (0.906 g, 3.0 mmol), 2-(tert-butyl-dimethyl-silanyloxy)ethanol (0.554 g, 3.15 mmol) and PPh3 (0.944 g, 3.6 mmol) in 20 mL of THF at -10 0C was added dropwise of diisopropylazodicarboxylate (DIAD) (0.728 g, 3.6 mmol) in 10 mL of THF. The ice-salt bath was removed and the reaction was kept at r.t. 2 h. The reaction solution was concentrated and purified by FC (EtOAc/Hexanes, 5/95) to afford 2-(tert-butyl-dimethyl-siianyloxy)ethoxy-3-bromo-5-iodorhoyridine, a colorless viscous liquid (0.995 g, 72%). 1H NMR £8.23 (d, IH, J= 2.0 Hz), 8.05 (d, IH, J= 2.0 Hz), 4.42 (t, 2H, J= 4.9 Hz), 3.98 (t, 2H, J= 4.9 Hz), 0.90 (s, 9H), 0.10 (s, 6H). HRMS calcd for C12H18BrINO2Si (M-CH3+), 441.9335; found, 441.9312.

The synthetic route of 637348-81-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA; WO2007/126733; (2007); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 1026796-81-5, N-(4-Bromopyridin-2-yl)acetamide, 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, Quality Control of N-(4-Bromopyridin-2-yl)acetamide, blongs to pyridine-derivatives compound. Quality Control of N-(4-Bromopyridin-2-yl)acetamide

1001161 To a mixture of N-(4-bromopyridin-2-yl)acetamide (17.2 g, 80 mmol), 4,4,4,4,5,5,5,5- octamethyl-2,2-bi-1,3,2-dioxaborolane (26.4 g, 104 mmol), Pd(dppf)C12 (11.7 g, 16 mmol) and KOAc (23.6 g, 240 mmol) under an atmosphere of nitrogen was added anhydrous DMF (1500 mL). The mixture was allowed to stir at 80 C for 3.5 h. The solvent was removed and the residue was diluted with EtOAc (1000 mL). Activated carbon (100 g) was added. The slurry was heated at reflux for 5 mm and then filtered. The organic solution was concentrated and the residue was recrystallized from EtOAc to give N[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl]acetamide (6.1 g, 29%) as a white solid. ?H NMR (400 MHz, DMSO-d6): 1.29 (s, 12H), 2.09 (s, 3H), 7.24 (dd, J= 6.0, 1.2 Hz, 1H), 8.30-8.33 (m, 2H), 10.47 (br s, 1H).

The synthetic route of 1026796-81-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MILLENNIUM PHARMACEUTICALS, INC.; BHARATHAN, Indu T.; BLACKBURN, Chris; CIAVARRI, Jeffrey P.; CHOUITAR, Jouhara; CULLIS, Courtney A.; D’AMORE, Natalie; FLEMING, Paul E.; GIGSTAD, Kenneth M.; GIPSON, Krista E.; GIRARD, Mario; HU, Yongbo; LEE, Janice; LI, Gang; REZAEI, Mansoureh; SINTCHAK, Michael D.; SOUCY, Francois; STROUD, Stephen G.; VOS, Tricia J.; XU, He; YE, Yingchun; WO2015/108881; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.886374-01-2, name is 5-Chloro-3-fluoro-2-methoxypyridine, molecular formula is C6H5ClFNO, molecular weight is 161.56, as common compound, the synthetic route is as follows.Recommanded Product: 886374-01-2

To a solution of compound 2 (3.6g, 17.56mmol, 1 eq) in Dry THF (20ml_), a solution of nBuLi (1.6M in hexane, 1 .5eq) was added dropwise over 10min at -78C and stirred 30min at the same temp. After, 30min crushed dry ice was added portion wise to the above solution at -78C. Then, the reaction mixture was allowed to warm up to RT over 2h. After 2h, the reaction mixture was cooled to 0C and neutralized by conc.HCI. Then, the reaction mixture was concentrates under reduced pressure to give a crude product. The crude product was dissolved in 5M NaOH solution and washed with ether; the aqueous layer was cooled to 0C and acidified to pH 5-6 by cone. HCI. A precipitate formed. The precipitate was filtered and washed with ether to give compound 3 (2.7g, 75.0%) as a white solid. LCMS: m/z 204.1 (M-1 )

At the same time, in my other blogs, there are other synthetic methods of this type of compound,886374-01-2, 5-Chloro-3-fluoro-2-methoxypyridine, and friends who are interested can also refer to it.

Reference:
Patent; ONTARIO INSTITUTE FOR CANCER RESEARCH (OICR); AL-AWAR, Rima; ISAAC, Methvin; CHAU, Anh My; MAMAI, Ahmed; WATSON, Iain; PODA, Gennady; SUBRAMANIAN, Pandiaraju; WILSON, Brian; UEHLING, David; PRAKESCH, Michael; JOSEPH, Babu; MORIN, Justin-Alexander; (441 pag.)WO2019/153080; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 13269-19-7, Adding some certain compound to certain chemical reactions, such as: 13269-19-7, name is 2-Nitropyridin-3-amine,molecular formula is C5H5N3O2, 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 13269-19-7.

Step (i): Synthesis Of 3-fluoro-2-nitropyridineA solution of sodium nitrite (20 g, 288 mmol) in water (40 mL) was added dropwiseto a stirred mixture of2-nitropyridine-3-amine (40 g, 288 mmol) in 34% fluoroboric acid(140 mL). During addition the temperature was maintained between -8 C to -2 DEG C. After0.5 h, the suspension was filtered and the solid washed with 34% fkioroboric acid (35 mL),ether (80 mL) and dried at room temperature under high vacuurn for 12 h to give 52 g of an orange brown soud of the fluoroborate salt. The dry solid was decomposed by heating to 120 DEG C. Afler decomposition the remaining oil was treated with a solution of 10% sodium hydrogenocarbonate (80mL) and the mixture was extracted with dichloromethane. The combined extracts were dried over sodium sulfate, filtered and the solvent removed overunder reduced pressure to yield the title compound as a pale yellow solid.

According to the analysis of related databases, 13269-19-7, the application of this compound in the production field has become more and more popular.

Reference:
Patent; AMGEN INC.; WO2006/44355; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 57883-25-7, 3-Bromo-2-ethoxypyridine, 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 57883-25-7, blongs to pyridine-derivatives compound. Product Details of 57883-25-7

To a solution of 3-bromo-2-ethoxy-pyridine (350 mg, 1.7 mmol) in NMP (2 mL) was added Zn(CN)2 (244 mg, 2.1 mmol) and Pd(dppf)Cl2 (127 mg, 0.17 mmol). The mixture was degassed with N2 and heated at 140 C. under microwave irradiation for 1 hour. The mixture was cooled to room temperature and filtered through celite. The filtered cake was washed with ethyl acetate (30 mL). The filtrate was washed with water (20 mL*2) and brine (20 mL), dried over Na2SO4, filtered and concentrated. The residue was purified by flash chromatography on silica gel (0%?20% ethyl acetate in petroleum ether) to give 2-ethoxynicotinonitrile.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,57883-25-7, 3-Bromo-2-ethoxypyridine, and friends who are interested can also refer to it.

Reference:
Patent; H. Lundbeck A/S; Juhl, Karsten; Jessing, Mikkel; Langgard, Morten; Vital, Paulo Jorge Vieira; Kehler, Jan; Rasmussen, Lars Kyhn; Clementson, Carl Martin Sebastian; Marigo, Mauro; US2019/185489; (2019); A1;,
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. 183428-91-3, name is 2-Amino-3-methyl-5-cyanopyridine. This compound has unique chemical properties. The synthetic route is as follows. category: pyridine-derivatives

The 2g6-amino-5-methylpyridine-3-carbonitrile (CAS183428-91-3) in 40 ml methanol and 18 ml of concentrated sulfuric acid solution and reflux heating in 3 hours. The mixture is added to ice water, adjusted to alkaline with sodium hydroxide, extracted with ethyl acetate. The organic phase with saturated sodium chloride solution, the sodium sulfate and concentrated in a vacuum. Get 1.95g6-amino-5-methylpyridine-3-carboxylic acid methyl ester.

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, 183428-91-3, 2-Amino-3-methyl-5-cyanopyridine.

Reference:
Patent; Bayer Pharmaceuticals; Norbert, Schmees; Benjamin, Bader; Bernard, Haendler; Volker, Schulze; Ingo, Hartung; Niels, Bohnke; Florian, Puhler; (72 pag.)CN105555786; (2016); A;,
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. 18368-73-5, name is 3-Methyl-2-nitropyridine, the common compound, a new synthetic route is introduced below. Recommanded Product: 18368-73-5

General procedure: To a stirred mixture of 1.00 mmol of nitropicoline 35 or 63, 1.20 mmol of the appropriate benzaldehyde, and 1.5 mmol of Huenig’s base in THF (7 mL/g of nitropicoline 35/63) was added 1.3 mmol of a 1 M THF solution of TBAF. The resulting mixture was heated 60 C for 1.5e2.0 h in the case of 2,3-dihydrofuro[3,2-c] pyridines or for 18 h in the case of 2,3-dihydrofuro[2,3-b]pyridines. After cooling to room temperature, the reactions were quenched with sat. aqueous NH4Cl. The solution was extracted with EtOAc, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel chromatography as specified above.

The synthetic route of 18368-73-5 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Kuethe, Jeffrey T.; Tetrahedron; vol. 75; 34; (2019);,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 401892-47-5, 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 401892-47-5, name is 5-Bromo-2-chloro-4-iodopyridine. This compound has unique chemical properties. The synthetic route is as follows.

To a stirred solution of 5-bromo-2-chloro-4-iodopyridine (20.0 g, 63.09 mmol) in DMF (200 mL), methyl 2,2-difluoro-2-(fluorosulfonyl)acetate (16.15 mL, 126.18 mmol) and Cul (24.02 g, 126.18 mmol) were added at RT under argon atmosphere. The reaction mixture was heated to 100 C for 6 hours. The reaction mixture was diluted with water (200 mL) filtered off and washed with w-pentane (2 X 500 mL) and cold water (3 X 1000 mL). The separated organic layer dried over with sodium sulfate and concentrated under reduced pressure at 30 C to give the crude compound. That was purified by column chromatography (5% pet ether: EtO Ac) that resulted in the title compound (9.0g, 44%) as a liquid compound. TLC: 5% EtO Ac in pet ether. LCMS [M+H]+ = 261.0 g/mol.

According to the analysis of related databases, 401892-47-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; ONTARIO INSTITUTE FOR CANCER RESEARCH (OICR); AL-AWAR, Rima; ZEPEDA-VELAZQUEZ, Carlos Armando; PODA, Gennady; ISAAC, Methvin; UEHLING, David; WILSON, Brian; JOSEPH, Babu; LIU, Yong; SUBRAMANIAN, Pandiaraju; MAMAI, Ahmed; (316 pag.)WO2017/147701; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 3430-18-0, 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. 3430-18-0, name is 2,5-Dibromo-3-methylpyridine. A new synthetic method of this compound is introduced below.

Under an argon atmosphere, a solution of 2 M isopropylmagnesium chloride in THF (5.5 ml) was cooled to -78 C., and a solution of 2,5-dibromo-3-methylpyridine (2.5 g) in THF (10 ml) was added dropwise. After stirring at the same temperature for 30 minutes, a solution of morpholine-4-carboaldehyde (1.26 g) in THF (5 ml) was added dropwise thereto, followed by elevating the temperature to 0 C. over 30 minutes, followed by stirring at 0 C. for 2 hours. To the reaction mixture was added water, followed by extraction with EtOAc. The organic layer was dried over Na2SO4 and the solvent was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane/EtOAc) to obtain 6-bromo-5-methyl nicotine aldehyde (1.42 g).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,3430-18-0, its application will become more common.

Reference:
Patent; Astellas Pharma Inc.; US2012/184520; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem