Day: April 6, 2022

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 167837-43-6, name is (E)-3-(6-Aminopyridin-3-yl)acrylic acid. This compound has unique chemical properties. The synthetic route is as follows. Quality Control of (E)-3-(6-Aminopyridin-3-yl)acrylic acid

(1) To methanol (5 ml) in dry ice-acetone bath was added thionyl chloride (0.41 ml) dropwise over 5 minutes. After (E)-3-(6-Aminopyridin-3-yl)acrylic acid (700 mg) was added to the mixture, the reaction mixture was heated at reflux for 1 hour, and the solvent was removed under reduced pressure. The reaction mixture was adjusted to pH 8 with saturated sodium bicarbonate aqueous solution and extracted with dichloromethane. The organic layer was washed with water and brine, dried over magnesium sulfate and evaporated in vacuo. The precipitate was collected by vacuum filtration and washed with isopropyl ether to give methyl (E)-3-(6-aminopyridin-3-yl)acrylate (725 mg) as a solid. mp: 173-175 C. NMR (DMSO-d6, delta): 3.67 (3H, s), 6.32 (1H, d, J=16 Hz), 6.45 (1H, d, J=8 Hz), 6.57 (2H, s), 7.51 (1H, d, J=16 Hz), 7.79 (1H, dd, J=2, 8 Hz), 8.15 (1H, d, J=2 Hz).

With the rapid development of chemical substances, we look forward to future research findings about 167837-43-6.

Reference:
Patent; Fujisawa Pharmaceutical Co., Ltd.; US5994368; (1999); 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. 67310-56-9, name is 1-(5-Hydroxypyridin-2-yl)ethanone, the common compound, a new synthetic route is introduced below. Recommanded Product: 1-(5-Hydroxypyridin-2-yl)ethanone

A mixture of Example 28A (0.1 g, 0.235 mmol), l-(5-hydroxypyridin-2-yl)ethanone (0.065 g, 0.471 mmol), potassium carbonate (0.065 g, 0.471 mmol) and potassium iodide (2.73 mg, 0.016 mmol) in acetone (2.0 mL) was stirred at 140 C (0-450 W) in a Biotage Initiator microwave reactor for 45 minutes. The suspension was filtered, and the filtrate was concentrated. This residue and NaBH^ (0.089 g, 2.35 mmol) in methanol was stirred at ambient temperature overnight. The reaction mixture was concentrated, and the residue was purified by HPLC (10-85% acetonitrile in 0.1% trifluoroacetic acid/water at 25 mL/minute on aPhenomenex Luna CI 8 5 mupiiota 100 A AXIA column (250 mm x 21.2 mm)) to give 59 mg of the title compound as a white solid.JH NMR (400 MHz, DMSO-<) delta ppm 8.74 (d, / = 26.6 Hz, 2H), 8.30 (d, / = 2.8 Hz, 1H), 7.81 - 7.60 (m, 2H), 7.47 (t, / = 8.9 Hz, 1H), 7.05 (dd, / = 11.4, 2.8 Hz, 1H), 6.83 (ddd, / = 9.0, 2.9, 1.2 Hz, 1H), 4.85 (q, / = 6.5 Hz, 1H), 4.61 (s, 2H), 4.46 (s, 2H), 2.25 (s, 6H), 1.37 (d, / = 6.5 Hz, 3H). MS (ESI+) m/z 464.0 (M+H)+. The synthetic route of 67310-56-9 has been constantly updated, and we look forward to future research findings. Reference:
Patent; CALICO LIFE SCIENCES LLC; ABBVIE INC.; MARTIN, Kathleen, Ann; SIDRAUSKI, Carmela; PLIUSHCHEV, Marina, A.; FROST, Jennifer, M.; TONG, Yunsong; BLACK, Lawrence, A.; XU, Xiangdong; SHI, Lei; ZHANG, Qingwei, I.; CHUNG, Seungwon; XIONG, Zhaoming; SWEIS, Ramzi, Farah; DART, Michael, J.; BROWN, Brian, S.; MURAUSKI, Kathleen; (673 pag.)WO2019/90069; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 1214336-41-0, Methyl 5-bromo-3-chloropicolinate, 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, name: Methyl 5-bromo-3-chloropicolinate, blongs to pyridine-derivatives compound. name: Methyl 5-bromo-3-chloropicolinate

[013381 NaBH4 (6 g, 158.52 mmol, 3.97 equiv) was added to a solution of methyl 5-bromo-3- chloropyridine-2-carboxylate (10 g, 39.92 mmol, 1.00 equiv) in methanol (150 mL) at 0C. The reaction was stirred for 3 h at 0C. The reaction was then quenched by water, diluted with ethyl acetate, washed with saturated sodium bicarbonate and brine, dried over anhydrous sodium sulfate, and concentrated under vacuum. This resulted in the title compound (8.9 g, crude) as a light yellow solid. LCMS [M+H] 224.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1214336-41-0, Methyl 5-bromo-3-chloropicolinate, and friends who are interested can also refer to it.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; GENENTECH, INC.; ESTRADA, Anthony; VOLGRAF, Matthew; CHEN, Huifen; KOLESNIKOV, Aleksandr; VILLEMURE, Elisia; VERMA, Vishal; WANG, Lan; SHORE, Daniel; DO, Steven; YUEN, Po-wai; HU, Baihua; WU, Guosheng; LIN, Xingyu; LU, Aijun; (537 pag.)WO2016/128529; (2016); 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 832735-60-1, name is 7-Bromo-[1,2,4]triazolo[4,3-a]pyridine. This compound has unique chemical properties. The synthetic route is as follows. Formula: C6H4BrN3

To a suspension of 7-bromo-[l,2,4]triazolo[4,3-a]pyridine (930.9 mg, 4.70 mmol) and diphenylmethanimine (1.70 g, 9.38 mmol) in toluene (40 mL) were added Pd2(dba)3 (217.7 mg, 0.24 mmol), BINAP (293.4 mg, 0.45 mmol) and t-BuONa (908.4 mg, 9.45 mmol). The reaction mixture was stirred at 100 C overnight and quenched with water (50 mL), and the resulting mixture was extracted with EtOAc (100 mL x 3). The combined organic phases were washed with brine (100 mL), dried over anhydrous Na2S04, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography (MeOH/DCM (v/v) = 1/20) to give the title compound as a brown solid (1.66 g, yield 46.3%).MS (ESI, pos. ion) m/z: 299.2 [M+H]+.

With the rapid development of chemical substances, we look forward to future research findings about 832735-60-1.

Reference:
Patent; SUNSHINE LAKE PHARMA CO., LTD.; CALITOR SCIENCES, LLC; XI, Ning; LI, Minxiong; PENG, Ju; LI, Xiaobo; ZHANG, Tao; HU, Haiyang; CHEN, Wuhong; BAI, Changlin; KE, Donghua; CHEN, Peng; (281 pag.)WO2019/99311; (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. 83766-88-5, name is 2-(tert-Butoxy)pyridine. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C9H13NO

Carboxylic acid (0.2 g, 1.64 mmol), tert-butoxypyridine (0.33 g, 2.21 mmol) and boron trifluoride diethyl etherate (0.31 g, 2.21 mmol) in dry PhCH3 (2 mL) were added to a 20-ml vial. The reaction mixture was then allowed to stir at room temperature for 30 min before quenching with anhydrous NaHCO3. The reaction mixture was diluted with ethyl acetate (30 mL), then washed with water (20 mL), followed by brine (20 mL). The organic layer was dried over anhydrous sodium sulfate and carefully concentrated under reduced pressure. The resulting residue was then purified by flash column chromatography on silica gel with 0:4 to 1:4 dichloromethane/hexane as eluent to yield the desired product 5a as a colorless oil.

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, 83766-88-5, 2-(tert-Butoxy)pyridine.

Reference:
Article; La, Minh Thanh; Kim, Hee-Kwon; Tetrahedron; vol. 74; 27; (2018); p. 3748 – 3754;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 886365-22-6, 5-Bromo-2-methoxyisonicotinic acid, 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, 886365-22-6, blongs to pyridine-derivatives compound. Application In Synthesis of 5-Bromo-2-methoxyisonicotinic acid

XXV-6 was obtained following the synthetic scheme as described above. MS (ES) m/z (M+H) 231.95.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,886365-22-6, its application will become more common.

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

Adding a certain compound to certain chemical reactions, such as: 1796-84-5, 4-Ethoxy-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, 1796-84-5, blongs to pyridine-derivatives compound. Computed Properties of C7H8N2O3

Step 4: 1-N,N-Dimethylcarbamoyl-4-bromo-3-(4-(N-3-nitropyridin-4-yl)aminomethylbenzoyl)indole. A mixture of the 1-N,N-dimethylcarbamoyl-4-bromo-3-(4-aminomethylbenzoyl)indole prepared in step 3 (13.65 g) and 4-ethoxy-3-nitropyridine (5.10 g, 30.3 mmol) in CH3 CN (50 mL) was heated at reflux for 50 hours during which time 46 mL of solvent distilled out. To the thick residue was added toluene (50 mL) and the mixture was heated at a rate such that 21 mL of solvent distilled off over 2 hours. The reaction mixture was cooled to ambient temperature and diluted with ethyl acetate (30 mL). The solution was placed directly on a silica gel column and eluted with 50%, then 80% ethyl acetate/toluene to give 1-N,N-dimethylcarbamoyl-4-bromo-3-(4-(N-3-nitropyridin-4-yl)aminomethylbenzoyl)indole (6.76 g), mp 173.5-174.5 C. after crystallization from ethyl acetate/ether.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1796-84-5, its application will become more common.

Reference:
Patent; Abbott Laboratories; US5486525; (1996); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 185041-05-8, 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.185041-05-8, name is Methyl 2-chloro-4-iodonicotinate, molecular formula is C7H5ClINO2, molecular weight is 297.48, as common compound, the synthetic route is as follows.

Amixture of methyl 2-chloro-4-iodonicotinate (4.00 g, 13.5 mmol, prepared inStep 1 for 23),(2,5-difluorophenyl)boronic acid (2.19 g, 13.8 mmol), PdCl2(dppf)(0.984 g, 1.34 mmol) and K2CO3 (4.65 g, 33.6 mmol) indioxane (25 mL) and water (5 mL) was heated to 80 C and stirred for 12 h. Thereaction mixture was filtered to remove insoluble material. The filtrate wasdiluted with water (55 mL) and the mixture was extracted with EtOAc (2 x 30mL). The combined organic phase was washed with brine (40 mL), dried withanhydrous Na2SO4, filtered and concentrated invacuo. The residue was purified by flash column chromatography on silicagel (Petroleum ether/EtOAc = 100/1 to 30/1) to afford methyl2-chloro-4-(2,5-difluorophenyl)nicotinate (3.70 g, 87%) as a colorless oil. 1HNMR (400 MHz, CDCl3) delta 3.78 (3H, s), 7.00-7.07 (1H, m), 7.09-7.19(2H, m), 7.30 (1H, d, J = 5.2 Hz),8.52 (1H, d, J = 5.2 Hz). MS (ESI)m/z: 284.0 [M+H]+.

Statistics shows that 185041-05-8 is playing an increasingly important role. we look forward to future research findings about Methyl 2-chloro-4-iodonicotinate.

Reference:
Article; Miyazaki, Tohru; Kawasaki, Masanori; Suzuki, Atsushi; Ito, Yuki; Imanishi, Akio; Maru, Takamitsu; Kawamoto, Tomohiro; Koike, Tatsuki; Bioorganic and Medicinal Chemistry Letters; vol. 29; 6; (2019); p. 815 – 820;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 884494-45-5, 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. 884494-45-5, name is 2-Fluoro-4-iodo-6-methylpyridine. A new synthetic method of this compound is introduced below.

INTERMEDIATE 25 4-lodo-2-methvl-6-(propan-2-vloxv)pyridine A mixture of 2-fuoro-4-iodo-6-methylpyridine (0.20 g, 0.84 mmol), isopropanol (0.20 mL, 2.6 mmol) and sodium hydride (95%, 100 mg, 4.0 mmol) in diethyl ether (5 mL) was stirred at 23 C for 16 h. The reaction mixture was filtered through a plug of silica gel, eluting with diethyl ether, and the solvent was allowed to evaporate at atmospheric pressure to give the 78 title compound. MS: m/z = 278.2 (M + 1). 1H NMR (400 MHz, DMSO) 6 7.20 (dd, 1H, J = 1.2, 0.7 Hz), 6.96 (dd, 1H, J = 1.3, 0.7 Hz), 5.26-5.15 (m, 1H), 2.32 (s, 3H), 1.25 (d, 6H, J = 6.2 Hz).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,884494-45-5, 2-Fluoro-4-iodo-6-methylpyridine, and friends who are interested can also refer to it.

Reference:
Patent; MERCK SHARP & DOHME CORP.; BELL, Ian, M.; ZHAO, Lianyun; FRALEY, Mark; ZHU, Cheng; BIFTU, Tesfaye; BRNARDIC, Edward Joseph; WANG, Cheng; ZARTMAN, C. Blair; GALLICCHIO, Steven; NGUYEN, Diem; CROWLEY, Brendan; POTTEIGER, Craig; (257 pag.)WO2016/22644; (2016); A1;,
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. 1003711-43-0, name is 2-Bromo-5-hydroxy-3-methylpyridine, molecular formula is C6H6BrNO, 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. HPLC of Formula: C6H6BrNO

6-Bromo-5-methylpyridin-3-ol (10.4 g, 55.3 mmol) and NCS (8.12 g, 60.8 mmol) in Nu,Nu-dimethylformamide (DMF) (150 mL) were heated at 80 C for 2 hours. The mixture was allowed to cool to room temperature, quenched with brine, and extracted 3 times with ethyl acetate. The combined organic layers were washed with 5% lithium chloride, washed with brine, dried over sodium sulfate, and concentrated. The residue was purified by silica chromatography eluting with a gradient of 0% to 50% ethyl acetate in hexanes. Fractions were concentrated to give 6-bromo-2-chloro-5-methylpyridin-3-ol (7.85 g, 35.3 mmol, 63.8 % yield) as a white powder. LCMS(ES+)(m/z) : 222, 224, 226 (M+1 ).

With the rapid development of chemical substances, we look forward to future research findings about 1003711-43-0.

Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; CATALANO, John G.; CHONG, Pek Yoke; DICKSON, Hamilton D.; LEIVERS, Martin R.; WEATHERHEAD, Jason Gordon; (186 pag.)WO2019/69293; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem