Pyridine-derivatives

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 872355-64-1, name is 1H-Pyrrolo[3,2-b]pyridine-5-carboxylic acid. This compound has unique chemical properties. The synthetic route is as follows. category: pyridine-derivatives

lH-pyrrolo[3,2-b]pyridine-5-carboxylic acid (0.49 g) and l-[l-(4-fluoro-phenyl)- ethyl]-2S,5R-dimethyl-piperazine (0.67 g) were dissolved in dry DMF (5 mL) and TBTU (0.97 g) was added followed by triethylamine (1.3 mL). The mixture was stirred overnight, whereupon it was poured into water and the solid thus separated was filtered and dried. The crude material was purified by flash chromatography using 20 % methanol : 80 % dichloromethane as a solvent (Yield: 0.49 g, Rf: 0.74 min, Condition B, M+H+: 367).

With the rapid development of chemical substances, we look forward to future research findings about 872355-64-1.

Reference:
Patent; SCIOS, INC.; WO2006/112828; (2006); 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. 64614-49-9, name is (6-Chloropyridin-3-yl)(morpholino)methanone. A new synthetic method of this compound is introduced below., HPLC of Formula: C10H11ClN2O2

To (6-chloro-pyridin-3-yl)-morpholin-4-yl-methanone (0.649g, 2.86mmoles) in ethanol (6mL) was added 0.270uL(3.0 equivalents) of hydrazine, followed by triethylamine 438.9uL (1.1 equivalents). The reaction was stirred overnight at 100C to give (6-hydrazino-pyridin-3-yl)-morpholin-4-yl-methanone. The reaction was filtered and then concentrated to dryness. The crude residue, (6-hydrazino-pyridin-3-yl)-morpholm-4-yl-methanone, weighed 0.372g(76% yield).

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, 64614-49-9, (6-Chloropyridin-3-yl)(morpholino)methanone.

Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; WO2004/46120; (2004); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 197376-47-9, 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. 197376-47-9, name is Ethyl 6-Chloropyridine-3-acetate. A new synthetic method of this compound is introduced below.

Lithium bromide (3.2 g, 37 mmol) and acetyl bromide (1.3 mL, 17 mmol) were added to a solution of (2-chloro-pyridin-5-yl)acetic acid ethyl ester (1.08 g, 5.42 mmol) in acetonitrile (7.2 mL), and the mixture was heated under reflux at an external temperature of 86 to 94C for 31 hours. The reaction mixture was dissolved in water. The solution was neutralized with a sodium hydroxide aqueous solution, followed by extraction with diethyl ether. The organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel chromatography (hexane/ethyl acetate = 4/1) to give the title compound (655 mg, 53%). 1H-NMR (chloroform-d): 1.26 (t, 3H, J=7.2Hz), 3.58 (s, 2H), 4.16 (q, 2H, J=7.2Hz), 7.44 (d, 1H, J=8.4Hz), 7.51 (dd, 1H, J=8.4, 2.4Hz), 8.26 (d, 1H, J=2.4Hz); MS (ESI+) : 244 ([M+H]+).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,197376-47-9, Ethyl 6-Chloropyridine-3-acetate, and friends who are interested can also refer to it.

Reference:
Patent; CHUGAI SEIYAKU KABUSHIKI KAISHA; EP1894911; (2008); 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. 1206968-88-8, name is (5-Bromo-3-chloropyridin-2-yl)methanol, molecular formula is C6H5BrClNO, 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. COA of Formula: C6H5BrClNO

[01340] A mixture of (5-bromo-3-chloropyridin-2-yl)methanol (2 g, 8.99 mmol, 1.00 equiv), Mn02 (7.77 g, 89.34 mmol, 9.94 equiv), and dichloromethane (150 mL) was stirred for overnight at 40C. The solids were filtrated out and the filtrate was concentrated. The residue was purified by a silica gel colunm eluting with ethyl acetate/petroleum ether (1/20) to afford the title compound (1.1 g, 56%) as a light yellow solid. LCMS [M+H] 222.

With the rapid development of chemical substances, we look forward to future research findings about 1206968-88-8.

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

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. 153747-97-8, name is tert-Butyl 4-(5-bromopyridin-2-yl)piperazine-1-carboxylate, molecular formula is C14H20BrN3O2, 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. Quality Control of tert-Butyl 4-(5-bromopyridin-2-yl)piperazine-1-carboxylate

A mixture of 1-28 (4.30 g, 12.57 rnmol), bis(pinacolato)diboron (3.82 g, 15.07 mmcl) and KOAc (2.94 g, 37.69 mmcl) in 1,4-dioxane (30 mL) was degassed in a stream of argon for 15 minutes. To the mixture was added 1,1- bis (diphenylphosphino) ferrocenepalladium(II) dichloridedichloromethane complex (0.307 g, 0.376 mmcl), and the reaction mixture was again degassed for additional 15 minutes. After stirring at 100C for 20 hours, the volatiles were removed by evaporation, and the obtained residue was diluted with water (50 mL), followed by extraction with ethyl acetate(50 mL x 3) . The combined organic layers were washed with brine (50 mL), dried over anhydrous Na2SO4 and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (100-200 mesh) using 50% EtOAc in hexanes to give the desired product Intermediate 1-CII as a mixture of minor boronate ester together with major boronic acid (4.8 g, crude yield 98%) as a yellow solid; IJCMS (for boronate ester): m/z 390.2 [M+1]; LCMS (for boronic acid): m/z 308.1 [M+1].

With the rapid development of chemical substances, we look forward to future research findings about 153747-97-8.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; KOUL, Summon; KURHADE, Suresh; NAIK, Keshav; SALUNKHE, Videsh; KULKARNI, Rakesh; PARDESHI, Vishwajeet; BHUNIYA, Debnath; KULKARNI, Bheemashankar; MOOKHTIAR, Kasim Abbaas; (274 pag.)WO2017/38909; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 20511-12-0, 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. 20511-12-0, name is 5-Iodopyridin-2-amine, molecular formula is C5H5IN2, 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.

To a solution of 5-iodopyridin-2-amine (0.7 g, 3.18 mmol) in HBr [(1.26 g, 15.6 mmol(48% in water)] at 000 sodium nitrite (0.746 g, 10.82 mmol) in water was added dropwise followed by addition of bromine (1 .71 g, 10.82 mmol). The reaction mixture was at room temperature for 1 h. The reaction mixture was quenched with NaOH solution and extracted with ethyl acetate, washed with water, and dried over anhydrous Na2SO4 The solvent was removed under vacuo. The crude product was purified bycolumn chromatography to yield title compound (0.6 g, 65.23%) as a white solid. LOMS: (M+H) = 284; 1H NMR: (DMSO-d6, 300MHz) 6 8.64-8.65 (d, 1H), 8.09-8.12 (dd, 1 H), 7.50-7.53 (m, 1 H).

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 20511-12-0, 5-Iodopyridin-2-amine.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; MADANAHALLI RANGANATH RAO, Jagannath; GURRAM RANGA, Madhavan; PACHIYAPPAN, Shanmugam; WO2014/202528; (2014); 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 17117-13-4, name is 2-Bromo-4-ethoxypyridine. This compound has unique chemical properties. The synthetic route is as follows. category: pyridine-derivatives

(2) Synthesis of 2′,6′-difluoro-4-ethoxy-2,3′-bipyridine Under an argon atmosphere, 0.81 g (4.00 mmol) of 2-bromo-4-ethoxy-pyridine, 1.02 g (6.40 mmol) of 2,6-difluoro-pyridyl-3-boronic acid, 0.0374 g (0.032 mmol) of Pd(PPh3)4 were dissolved in 30 mL of dioxane, followed by addition of 10 mL of an aqueous solution of 5 wt % K2CO3, heated to reflux, stirred for 18 h. After naturally cooled to room temperature, an appropriate amount of distilled water was added, and the solution was extracted several times with ethyl acetate, the organic phase were combined and dried over anhydrous MgSO4. After filtration, solvent was removed from the filtrate under reduced pressure to give the crude product. The crude product was purified to silica gel column chromatography using a mixture of ethyl acetate and n-hexane (v/v=1:4) as eluent to obtain 0.56 g of a colorless solid product in 59.6% yield. 1H NMR (400 MHz, CDCl3, ppm): delta 8.92 (d, 1H), 8.65 (d, 1H), 7.75 (d, 1H), 7.43 d, 1H), 6.92 (s, 1H), 4.12 (m, 2H), 1.90 (m, 3H).

With the rapid development of chemical substances, we look forward to future research findings about 17117-13-4.

Reference:
Patent; Ocean’s King Lighting Science & Technology Co., Ltd.; Zhou, Mingjie; Wang, Ping; Zhang, Juanjuan; Zhang, Zhenhua; US8859771; (2014); B2;,
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 886364-94-9, name is 5-Bromo-4-methylpicolinaldehyde. This compound has unique chemical properties. The synthetic route is as follows. Recommanded Product: 5-Bromo-4-methylpicolinaldehyde

To a solution of the compound obtained in Step B (3.1 g) in EtOH (47.5 ml) and water (23 ml) were added hydroxylamine hydrochloride (1.4g) and sodium acetate (1.9 g). The reaction was stirred for 15 min at room temperature. The white solid was filtered off and the solution concentrated in vacuo to afford the crude title product (2.2 g, white solid), which was used directly for the next step. LCMS (Method F) 2.09 min, M+H 564/566.

With the rapid development of chemical substances, we look forward to future research findings about 886364-94-9.

Reference:
Patent; SYNGENTA PARTICIPATIONS AG; CASSAYRE, Jerome Yves; RENOLD, Peter; EL QACEMI, Myriem; PITTERNA, Thomas; TOUEG, Julie Clementine; WO2011/67272; (2011); 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 23628-31-1, name is 6-Aminopicolinic acid. This compound has unique chemical properties. The synthetic route is as follows. Formula: C6H6N2O2

To a solution of 2-amino-6-pyridinecarboxylic acid (64; 6.0 g, 43.5 mmol) in ethanol (150 mL) was added SOCl2 (12.0 g, 101 mmol) at 00C. The resulting reaction mixture was stirred under reflux for 12 h. Upon cooling to room temperature, the reaction mixture was concentrated under reduced pressure. Enough saturated aqueous Na2CO3 solution was added to adjust the pH = 9. The mixture was concentrated under reduced pressure and dichloromethane (150 mL) was added to the resulting residue. The mixture was stirred vigorously at room temperature for 30 min and then filtered. The filtrate was concentrated under reduced pressure to afford ethyl 6-aminopicolinate 65 (5.5 g, 76%). MS (ESI) calcd for C8Hi0N2O2: 166.2; found: 167 [M+H].

With the rapid development of chemical substances, we look forward to future research findings about 23628-31-1.

Reference:
Patent; SIRTRIS PHARMACEUTICALS, INC.; VU, Chi, B.; CASAUBON, Rebecca, L.; WO2010/101949; (2010); 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. 84539-34-4, name is 4-Amino-3,5-dibromopyridine. A new synthetic method of this compound is introduced below., Computed Properties of C5H4Br2N2

Into a 500-mL round-bottom flask, was placed 3,5-dibromopyridin-4-amine (5 g, 19.9 mmol, 1.0 equiv) in dioxane (150 mL) and water(l 5 mL). 4,4,5,5-tetramethyl-2-(prop-l-en-2- yl)-l,3,2-dioxaborolane (10.1 g, 60.0 mmol, 3.0 equiv), CS2CO3 (19.6 g, 60.0 mmol, 3.0 equiv) and Pd(dppf)Ch (1.5 g, 2.00 mmol, 0.03 equiv) were added to the solution. The resulting solution was stirred for 15 h at 90C in an oil bath. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1 :3). This resulted in 3.0 g (87.0%) of 3,5-bis(prop-l ~en~2-yl)pyridin-4-amine as light yellow 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, 84539-34-4, 4-Amino-3,5-dibromopyridine.

Reference:
Patent; NOVARTIS INFLAMMASOME RESEARCH, INC.; FRANCH, Luigi; GHOSH, Shomir; GLICK, Gary; KATZ, Jason; OPIPARI, Anthony William, Jr.; ROUSH, William R.; SEIDEL, Hans Martin; SHEN, Dong-Ming; VENKATRAMAN, Shankar; WINKLER, David Guenther; (479 pag.)WO2020/10143; (2020); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem