Pyridine-derivatives

Reference of 1187236-18-5, 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 1187236-18-5 as follows.

Under the protection of -78 C and N2,To ethyl 7-bromoimidazo[1,2-a]pyridine-2-carboxylate (3.50 g, 13.0 mmol)Add in anhydrous DCM (80 mL) suspensionDiisobutylaluminum hydride (18.50 mL, 18.50 mmol, 1.0 M).The mixture was stirred at -78 C overnight.After the reaction is over, move to 0 C.And add water (0.75mL) in turn.15% NaOH aqueous solution (0.75mL)The reaction was quenched with water (2 mL).The resulting mixture was stirred at room temperature for 15 minutes.Then add Et2O (50 mL),EtOAc (50 mL) and Mg 2 SO 4 (20 g).Continue stirring for 15 minutes and filter again.The resulting filter cake was rinsed with EtOAc (200 mL).The filtrate was concentrated under reduced pressure.The residue obtained was purified by silica gel column chromatography (EtOAc /EtOAcTo give the title compound as a pale yellow solid (1.50g, 51% yield).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1187236-18-5, its application will become more common.

Reference:
Patent; Guangdong Dongyangguang Pharmaceutical Co., Ltd.; Jiatuo Sciences Corporation; Xi Ning; Li Minxiong; Peng Ju; Li Xiaobo; Zhang Tao; Hu Haiyang; Chen Wuhong; Bai Changlin; Ke Donghua; Chen Peng; (217 pag.)CN109776522; (2019); A;,
Pyridine – Wikipedia,
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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 128071-75-0, name is 2-Bromonicotinaldehyde. This compound has unique chemical properties. The synthetic route is as follows. Product Details of 128071-75-0

Wittig Reaction (8) (0263) Ethyl (triphenylphosphoranylidene) acetate (2.80 g, 8.17 mmol) was added to a solution of 2-bromonicotinaldehyde (1.0 g, 5.4 mmol) in dry DCM (dichloromethane) at 0 C. and stirred for 8 h at room temperature. The solvent was then evaporated under vacuum. The colorless oil was partitioned between ethylacetate and water. The organic layer was washed with water, brine and dried over Na2SO4. It was then filtered and evaporated to give an oil from which the title compound 8 was isolated by column chromatography (Si-gel, PE: EA=15:1). Yield: 1.3 g, 94%; State:colorless oil.

With the rapid development of chemical substances, we look forward to future research findings about 128071-75-0.

Reference:
Patent; The Florida State University Research Foundation, Inc.; Alabugin, Igor V.; Mondal, Sayantan; Mohamed, Rana K.; (60 pag.)US2016/347778; (2016); A1;,
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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. 696-54-8, name is Pyridine-4-aldoxime, the common compound, a new synthetic route is introduced below. Formula: C6H6N2O

General procedure: To a mixture of oxime (0.86mmol) and Raney Co 2724 (200 mg, slurry in H2O) were addedTHF (1.5 mL) and MeOH (1.5 mL). The reaction mixture waspurged with nitrogen twice then pressurized to 60 psi H2 at 50C. The reaction was deemed complete when H2 consumptionceased, typically after 2-10 h. Upon completion, the reactionwas filtered through a pad of celite and washed with MeOH. Thefiltrate was then concentrated under reduced pressure, andpurified by flash chromatography (CH2Cl2-MeOH, 95:5) tofurnish the title compound. Alternatively, the product was convenientlyisolated in high purity as the HCl salt. After filteringoff the catalyst, the filtrate solvent was changed to MTBE (1.5mL) and HCl (0.95 mmol, 1 M in Et2O) was added dropwise tocrystallize the salt. The resulting HCl amine salt was then isolatedby filtration and washed with MTBE.

The synthetic route of 696-54-8 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Baucom, Kyle D.; Guram, Anil S.; Borths, Christopher J.; Synlett; vol. 26; 2; (2015); p. 201 – 204;,
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Adding a certain compound to certain chemical reactions, such as: 13535-01-8, 5-Bromopyridin-3-amine, 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, 13535-01-8, blongs to pyridine-derivatives compound. Recommanded Product: 13535-01-8

To a solution of 5-bromopyridin-3-amine (4.75 g, 27.45 minol) in dioxane (45 mL) was added cyclopropylboronic acid (4.75 g, 55.30 minol), C52CO3(28 g, 85.67 minol), tetrakis(triphenylphosphane) palladium(1.66 g, 1.44 minol) and water (5 mL) at room temperature. The resultingminxture was then stirred for 15 h at 100 C. After cooling to room temperature, the reaction mxiture was diluted with water (200 mL). The resultingminxture was extracted with ethyl acetate (500 mL x 3). The organic phases were combined, washed with brine and dried over Na2SO4. The solvent was removed under reduced pressure and the residue was purified by flash chromatography eluting with EtOAc in hexane (0% to 100% gradient) to yield 5-cyclopropylpyridin-3-amine as light brown oil (2.08 g, 56%). MS: m/z = 135.0 [M+Hj .

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,13535-01-8, its application will become more common.

Reference:
Patent; MERCK PATENT GMBH; SHERER, Brian A.; BRUGGER, Nadia; (546 pag.)WO2017/106607; (2017); A1;,
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Pyridine | C5H5N – PubChem

Application of 59718-84-2, 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.59718-84-2, name is Methyl 3-methylpicolinate, molecular formula is C8H9NO2, molecular weight is 151.16, as common compound, the synthetic route is as follows.

5 g quantity of methyl 3- [2- (3-benzyloxy-4-methoxy phenyl) oxazol-4-yl] propionate obtained in Reference Example 48 and 3.2 g of methyl 3-methylpicolinate were dissolved in 150 ml of dimethoxyethane. While stirring the solution with ice cooling 1.2 g of sodium hydride was added thereto and further stirred. The reaction mixture was heated and refluxed for 4 hours. At the completion of the reaction, a saturated aqueous ammonium chloride solution was added to the mixture while stirring with ice cooling, and the mixture was further stirred. After stirring the reaction mixture for 30 minutes, water was added thereto and ethyl acetate extraction was performed. The organic layer was washed twice with water, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (n- hexane: ethyl acetate = 2:1), thereby yielding 5.5 g of colorless oily substance methyl 2- [2- (3-benzyloxy-4-methoxyphenyl) oxazol-4- ylmethyl] -3- (3-methylpyridin-2-yl) -3-oxopropionate. 1H-NMR (CDCl3) delta: 8.49 (IH, dd, J = 4.8, 1.2 Hz), 7.59-7.28 (1OH, m), 6.91 (IH, d, J = 9.0 Hz), 5.23-5.16 (3H, m) , 3.91 (3H, s) , 3.65 (3H, s), 3.37-3.18 (2H,m,) 2.59 (3H, s)

Statistics shows that 59718-84-2 is playing an increasingly important role. we look forward to future research findings about Methyl 3-methylpicolinate.

Reference:
Patent; OTSUKA PHARMACEUTICAL CO., LTD.; WO2007/58338; (2007); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 58584-86-4 , The common heterocyclic compound, 58584-86-4, name is Ethyl 2,6-dichloronicotinate, molecular formula is C8H7Cl2NO2, 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.

A mixture of 3-(dispiro[2.0.2. l]heptan-7-ylmethoxy)-lH-pyrazole (0.94 g, 4.9 mmol), ethyl 2,6-dichloropyridine-3-carboxylate (1.15 g, 5.23 mmol), potassium carbonate (0.83 g, 6.0 mmol), and l,4-diazabicyclo[2.2.2]octane (0.12 g, 1.1 mmol) in DMSO (16 mL) was stirred for 24 hours. The reaction was diluted with water and extracted with ethyl acetate. The combined extracts were washed with brine and water, dried over sodium sulfate, and evaporated under vacuum. The residue was purified by silica gel column chromatography eluting with 0-20% ethyl acetate in hexanes to give ethyl 2-chloro-6-(3-(dispiro[2.0.2.1]heptan-7-ylmethoxy)-lH-pyrazol-l-yl)nicotinate (1.39 g, 75% yield) as a colorless solid. ESI-MS m/z calc. 373.11932, found 374.2 (M+l)+; Retention time: 0.87 minutes. *H NMR (400 MHz, Chloroform-d) delta 8.36 (d, J = 2.8 Hz, 1H), 8.27 (d, J = 8.5 Hz, 1H), 7.72 (d, J = 8.5 Hz, 1H), 5.96 (d, J = 2.9 Hz, 1H), 4.41 (q, J = 7.1 Hz, 2H), 4.30 (d, J = 7.0 Hz, 2H), 1.94 (t, J = 7.0 Hz, 1H), 1.42 (t, J = 7.1 Hz, 3H), 1.02-0.89 (m, 4H), 0.75-0.65 (m, 2H), 0.65-0.53 (m, 2H)

The synthetic route of 58584-86-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; ALCACIO, Timothy; BAEK, Minson; GROOTENHUIS, Peter; HADIDA RUAH, Sara, Sabina; HUGHES, Robert, M.; KESHAVARZ-SHOKRI, Ali; MCAULEY-AOKI, Rachel; MCCARTNEY, Jason; MILLER, Mark, Thomas; VAN GOOR, Fredrick; ZHANG, Beili; ANDRESON, Corey; CLEVELAND, Thomas; FRIEMAN, Bryan, A.; KHATUYA, Haripada; JOSHI, Pramod, Virupax; KRENITSKY, Paul, John; MELILLO, Vito; PIERRE, Fabrice, Jean Denis; TERMIN, Andreas, P.; UY, Johnny; ZHOU, Jinglan; ABELA, Alexander, Russell; BUSCH, Brett, Bradley; PARASELLI, Prasuna; SIESEL, David, Andrew; (329 pag.)WO2018/64632; (2018); A1;,
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Pyridine | C5H5N – PubChem

Related Products of 40296-46-6 ,Some common heterocyclic compound, 40296-46-6, molecular formula is C8H7Cl2NO2, 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.

Sodium hydroxide (40 mL, 6.25 M solution) was added to a stirred solution of 4,6-dichloronicotinic acid ethyl ester (22) (25.95 g, 118 mmol) in 4:1:1 THF:MeOH:water (600 mL). After 30 minutes, the reaction mixture was acidified to pH 2 with concentrated HCl, diluted with 1:1 EtOAc:Et2O and washed with water and brine. The organic layer was dried (Na2SO4) and concentrated. The resulting off-white solid was twice concentrated from toluene to give the desired product (23) as a white solid (21.73 g, 96%).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 40296-46-6, Ethyl 4,6-dichloronicotinate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Wallace, Eli; Hurley, Brian; Yang, Hon Woon; Lyssikatos, Joseph; Blake, Jim; US2005/49419; (2005); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 13603-44-6, 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.13603-44-6, name is 2,6-Dimethylpyridin-4-ol, molecular formula is C7H9NO, molecular weight is 123.15, as common compound, the synthetic route is as follows.

To a solution of 4-fluor-benzaldehyde (1.00 g, 8.06 mmol, 1.00 eq.) in DMA (7 mL), 2,6- dimethyl-4-hydroxypyridine (1.09 g, 8.86 mmol, 1.10 eq.) and K2C03(1.11 g, 8.46 mmol, 1.05 eq.) were added. The reaction mixture was heated to reflux for 4 hours. The reaction mixture was diluted with ethyl acetate, washed with water and a sat. NaCI soln., dried over MgS04, and concentrated in vacuo. The residue was purified by flashmaster (column: 100 g, flow: 45 mL/min, 40 fractions of 45 mL, Hept/AcOEt 8:2 to 100% AcOEt) to yield the title compound as a white solid.LC-MS 3: tR= 0.78 min; [M+H]+= 228.1

Statistics shows that 13603-44-6 is playing an increasingly important role. we look forward to future research findings about 2,6-Dimethylpyridin-4-ol.

Reference:
Patent; ACTELION PHARMACEUTICALS LTD; AISSAOUI, Hamed; BOSS, Christoph; CIANA, Claire-Lise; KIMMERLIN, Thierry; SIEGRIST, Romain; WO2014/141175; (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 69142-64-9, name is Ethyl 6-aminopicolinate. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C8H10N2O2

To a solution of ethyl 6-aminopicolinate (91; 5.5 g, 33 mmol) in t-BuOH (120 mL) and acetone (40 mL) was added DMAP (0.08g, 0.66 mmol) and di-t-butyl dicarbonate (10.8 g, 49.5 mmol). The reaction mixture was stirred at room temperature for 18 h. The solvent was removed by concentration under reduced pressure and a mixture of hexane/dichloromethane (180 mL, 3:1) was added. The resulting mixture was cooled to – 20 0C for 2 h. The resulting solids were collected by filtration and dried to afford ethyl 6- (tert-butoxycarbonylamino)picolinate 92 (11.0 g, 91%).

With the rapid development of chemical substances, we look forward to future research findings about 69142-64-9.

Reference:
Patent; SIRTRIS PHARMACEUTICALS, INC.; VU, Chi, B.; DISCH, Jeremy, S.; NG, Pui, Yee; BLUM, Charles, A.; PERNI, Robert, B.; WO2010/3048; (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. 126325-50-6, name is 3-Amino-2-bromo-4-picoline. A new synthetic method of this compound is introduced below., COA of Formula: C6H7BrN2

To a cooled (13 C) mixture of 3-amino-2-bromo-4-picoline (4.5 g, 24.06 mmol, Combi-Blocks) and potassium acetate (3.09 g, 31.5 mmol) in AcOH (100 mL) was added a solution of sodium nitrite (2.01 g, 29.1 mmol) in water (10 mL) dropwise. Upon complete addition the reaction mixture was allowed to slowly warm to rt for 66 h. A solution of NaN02 (706 mg) in water (3 mL) was added to the reaction mixture and the reaction mixture was stirred for 5 h. The solvent was removed under reduced pressure and the residue was basified with saturated NaHC03. The aqueous layer was extracted with EtOAc (3x) and the combined organic layers were washed with water then brine, and dried over MgS04. The filtrate was purified by silica gel flash chromatography, eluting with EtOAc:hexanes (0: 1? 1 :1) to give a white crystalline solid (1.38 g, 7.0 mmol, 29%).MS m/z=198 [M+H]+. Calculated for C6H4BrN3: 198

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, 126325-50-6, 3-Amino-2-bromo-4-picoline.

Reference:
Patent; AMGEN INC.; MINATTI, Ana Elena; LOW, Jonathan, D.; ALLEN, Jennifer, R.; AMEGADZIE, Albert; BROWN, James; FROHN, Michael, J.; GUZMAN-PEREZ, Angel; HARRINGTON, Paul, E.; LOPEZ, Patricia; MA, Vu Van; NISHIMURA, Nobuko; QIAN, Wenyuan; RUMFELT, Shannon; RZASA, Robert, M.; SHAM, Kelvin; SMITH, Adrian, L.; WHITE, Ryan; XUE, Qiufen; WO2014/138484; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem