Category: pyridine-derivatives

Adding a certain compound to certain chemical reactions, such as: 853909-08-7, 5-Ethynyl-2-fluoropyridine, 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, 853909-08-7, blongs to pyridine-derivatives compound. HPLC of Formula: C7H4FN

A solution of 5-ethynyl-2-fluoro-pyridine (500 mg, 4.13 mmol), l-Boc-piperazine (923 mg, 4.95 mmol) and triethylamine (1.15 mL, 8.26 mmol) in MeCN (10 mL) was stirred at 60 C for 16 h. The reaction was poured into H20 (50 mL) and extracted with EtOAc (70 mL). The organic layer was separated, dried over Na2S04, filtered and concentrated under vacuum The residue was purified by silica gel chromatography (petroleum ehtenEtOAc, 10: 1 to 2: 1) to afford /e/ -butyl 4-(5-ethynyl-2-pyridyl)piperazine-l-carboxylate (630 mg, 79%) as white solid. lH NMR (CHLOROLORM-d, 400 MHz) d 8.24 (d, 1H, 7=2.2 Hz), 7.48 (dd, 1H, 7=2.3, 8.9 Hz), 6.48 (d, 1H, J= 8.8 Hz), 3.4-3.5 (m, 8H), 3.00 (s, 1H), 1.41 (s, 9H)

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,853909-08-7, its application will become more common.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; BORRONI, Edilio; GOBBI, Luca; HONER, Michael; EDELMANN, Martin; MITCHELL, Dale; HARDICK, David; SCHMIDT, Wolfgang; STEELE, Christopher; MULLA, Mushtaq; (151 pag.)WO2019/121661; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 951625-93-7, 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 951625-93-7, name is Methyl 4-chloro-1H-pyrrolo[2,3-b]pyridine-5-carboxylate. This compound has unique chemical properties. The synthetic route is as follows.

Synthesis of methyl 4-chloro-l-tosyl-lH-pyrrolo[2,3-b]pyridine-5-carboxylate:Sodium hydride (341 mg, 8.53 mol, 1.2 eq) was added in portions to a solution of methyl 4- chloro-lH-pyrrolo[2,3-b]pyridine-5-carboxylate (1.5 g, 7.1 mmol, 1.0 eq) in THF (20 mL). The suspension was stirred at 0 C for 30 min, then a solution of 4-methylbenzene-l-sulfonyl chloride (2.7 g, 14.2 mmol, 2.0 eq) in THF (10 mL) was added at 0 C. The resulting suspension was stirred at this temperature for 15 min and 1 h at room temperature. The suspension was filtered through Celite. The filtrate was diluted with EtOAc (200 mL), washed with brine (100 mL x 3). The combined organic layer was dried (MgS04) and concentrated in vacuo to afford a residue which was purified by silica gel column chromatography (PE/EA = 10:1) to give 128.5 a white solid (1.6 g, yield: 60%). XH NMR (400 MHz, DMSO-J6) delta: 8.84 (s, 1H), 8.12 (d, 1H), 8.06 (d, 2H), 7.46 (d, 2H), 6.98 (d, 1H), 3.93 (s, 3H), 2.39 (s, 3 H). ESI-MS: 365.0 (M+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 951625-93-7, Methyl 4-chloro-1H-pyrrolo[2,3-b]pyridine-5-carboxylate.

Reference:
Patent; BIOGEN IDEC MA INC.; SUNESIS PHARMACEUTICALS, INC.; HOPKINS, Brian, T.; SCOTT, Daniel; CONLON, Patrick; JENKINS, Tracy, J.; POWELL, Noel; GUAN, Bing; CURERVO, Julio, H.; WANG, Deping; TAVERAS, Art; WO2012/58645; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 89809-63-2, Adding some certain compound to certain chemical reactions, such as: 89809-63-2, name is 5-Methoxypicolinonitrile,molecular formula is C7H6N2O, 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 89809-63-2.

Using the general procedure for the synthesis of amidoximes, 2-cyano-5-methoxypyridine (270 mg, 2.01 mmol), a solution of hydroxylamine hydrochloride (0.457 ml of 5 M, 2.28 mmol) in ethanol (4 mL), and sodium hydroxide (0.230 mL of 10 N, 2.30 mmol) were heated at reflux for 24 hours. Standard work up afforded 79 mg (24%) of 5-methoxypyrid-2-ylamidoxime.

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. 89809-63-2, 5-Methoxypicolinonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Wagenen, Bradford Van; Stormann, Thomas M.; Moe, Scott T.; Sheehan, Susan M.; McLeod, Donald A.; Smith, Daryl L.; Isaac, Methvin Benjamin; Slassi, Abdelmalik; US2003/55085; (2003); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 13958-93-5, Adding some certain compound to certain chemical reactions, such as: 13958-93-5, name is 3,5-Dichloroisonicotinic acid,molecular formula is C6H3Cl2NO2, 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 13958-93-5.

Preparation of 3,5-dichloro-N-(4-hydroxymethyl-phenyl)-isonicotinamide: A suspension of 3,5-dichloroisonicotinic acid (128 mg, 0.667 mmol) in thionyl chloride (2 mL) was heated at reflux for 2 h, then concentrated. To the residue was added 4-aminobenzyl alcohol (123 mg, 0.999 mmol) and THF (2.2 mL), and the mixture was stirred at room temperature for 19 h. The mixture was filtered, and the filtrate was concentrated to give a yellow foam (125 mg, 63%). 1H NMR (CD3OD) delta 4.60 (s, 2H), 7.38 (d, 2H, J=8.7 Hz), 7.63 (d, 2H, J=8.4 Hz), 8.66 (s, 2H).

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. 13958-93-5, 3,5-Dichloroisonicotinic acid, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Bridger, Gary; Skerlj, Renato; Kaller, Al; Harwig, Curtis; Bogucki, David; Wilson, Trevor R.; Crawford, Jason; McEachern, Ernest J.; Atsma, Bem; Nan, Siqiao; Zhou, Yuanxi; Schols, Dominique; Smith, Christopher Dennis; Di Fluri, Maria Rosaria; US2002/147192; (2002); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 92992-85-3, 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 92992-85-3, name is 2-Bromo-3,5-dimethylpyridine. This compound has unique chemical properties. The synthetic route is as follows.

Example 166 2-[2-(3,5-dimethylpyridin-2-yl)-5,8-dioxo-6-(propan-2-yl)-5,6,7,8-tetrahydro-4H-pyrazolo[1,5-a]pyrrolo[3,4-d]pyrimidin-4-yl]-N-(5-fluoropyridin-2-yl)acetamide . A mixture of 2-bromo-3,5-dimethylpyridine (64 mg, 345 muetaetaomicronIota) and hexamethylditin (72 muIota, 350 muetaetaomicronIota) in 1,4-dioxane (3 ml) was degassed with a stream of nitrogen, then tetrakis(triphenylphosphine)palladium(0) (12 mg, 10.8 muetaetaomicronIota) was added. The reaction was subjected to microwave irradiation at 1 10 C for 2h. 2-[2-Bromo-5,8-dioxo-6-(propan-2-yl)-5,6,7,8-tetrahydro-4H-pyrazolo[1,5-a]pyrrolo[3,4-d]pyrimidin-4-yl]-N-(5-fluoropyridin-2-yl)acetamide (100 mg, 216 muetaetaomicronIota) (example 75) was added, and the reaction irradiated at 1 10C for a further 2h. KF and celite (1 :1 mixture, 250 mg) were added, and the solution stirred for one hour, before being filtered, washing with ethyl acetate/methanol, and concentrated under reduced pressure. The crude mixture was taken up in toluene (3 ml), and degassed with a stream of N2 for 5mins. Tetrakis(triphenylphosphine)palladium(0) (12 mg, 10.8 muetaetaomicronIota) was added, and the reaction irradiated to 120C in the microwave for 1 h, the irradiation was then repeated until conversion was complete. KF and celite (1 :1 mixture, 250 mg) were added, and the solution stirred for one hour, before being filtered, washing with ethyl acetate/methanol, and concentrated under reduced pressure. The crude material was purified by preparative HPLC, then further purified by trituration from MeCN to afford 27.7 mg (26% yield) of the title compound as an off-white powder. 1H NMR (500 MHz, Chloroform-d) delta [ppm] 1.34 (d, 6H), 2.35 (s, 3H), 2.75 (s, 3H), 4.39 (s, 2H), 4.51 – 4.64 (m, 1H), 5.46 (s, 2H), 6.95 (s, 1H), 7.37 – 7.44 (m, 2H), 8.09 – 8.17 (m, 2H), 8.33 (s, 1H), 8.91 (s, 1H). LC-MS (Analytical Method F) Rt = 2.30 min; MS (ESIpos): m/z = 490 [M+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 92992-85-3, 2-Bromo-3,5-dimethylpyridine.

Reference:
Patent; BAYER AKTIENGESELLSCHAFT; BAYER PHARMA AKTIENGESELLSCHAFT; KOPPITZ, Marcus; SIEBENEICHER, Holger; BRAeUER, Nico; POOK, Elisabeth; ROTGERI, Andrea; NEUHAUS, Roland; FISCHER, Oliver, Martin; NAGEL, Jens; DAVENPORT, Adam, James; CARR, James, Lindsay; TOWNSEND, Robert, James; CONNELLY URSINYOVA, Nina; PARROTT, Shelley, Anne; (471 pag.)WO2019/81343; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 887707-23-5, 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 887707-23-5, name is 2-Hydroxy-5-iodo-3-(trifluoromethyl)pyridine. This compound has unique chemical properties. The synthetic route is as follows.

Step B. 2-chloro-5-iodo-3-(trifluoromethyl)pyridine A suspension of 5-iodo-3-(trifluoromethyl)pyridin-2-ol (3.0 g, 10.4 mmol) in POCI3 (8 mL) was heated at 100 C overnight. After cooling down to room temperature, the mixture was poured into ice (50 g). The resulting aqueous layer was neutralized by Na2C03 and extracted with EtOAc (70 mL x 2). The extracts were combined, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography using petroleum ether:EtOAc (100: 1-4: 1) as eluting solvents to afford 2- chloro-5-iodo-3-(trifluoromethyl)pyridine as a white solid (2.0 g, 63%). 1H NMR (500 MHz, CDC13) delta (ppm) 8.78 (d, / = 2.0 Hz, 1H), 8.28 (d, / = 2.0 Hz, 1H).

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 887707-23-5, 2-Hydroxy-5-iodo-3-(trifluoromethyl)pyridine.

Reference:
Patent; BEAUFOUR-IPSEN (TIANJIN) PHARMACEUTICAL CO., LTD.; AUVIN, Serge; LANCO, Christophe; DUTRUEL, Oliver; CHAO, Qi; GU, Kaichun; WO2015/100617; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 1042141-37-6, Methyl 2-bromoimidazo[1,2-a]pyridine-6-carboxylate, 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, Application In Synthesis of Methyl 2-bromoimidazo[1,2-a]pyridine-6-carboxylate, blongs to pyridine-derivatives compound. Application In Synthesis of Methyl 2-bromoimidazo[1,2-a]pyridine-6-carboxylate

Example 1 2-({ [2-(2-methylbiphenyl-3-yl)imidazo[l,2-a]pyridin-6-yl]methyl}amino)ethanol Step 1: (2-bromoimidazo[l, To a solution of methyl 2-bromoimidazo[l,2-a]pyridine-6-carboxylate (200 mg, 0.784 mmol) (ArkPharm, catAK-31669) in tetrahydrofuran (5.0 mL) at 0 C was added 1.0 M diisobutylaluminum hydride in tetrahydrofuran (862 mu, 0.862 mmol). The resulting mixture was sitrred at room temperature for 1 h then it was quenched with saturated NH4CI aqueous solution (1 mL), stirred for 1 h then filtered through celite. The organic layer was dried over Na2S04, filtered and concentrated. The residue was used for next step without further purification. LC-MS calculated for C8H8BrN20 (M+H)+: m/z = 227.0; found 227.2.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1042141-37-6, Methyl 2-bromoimidazo[1,2-a]pyridine-6-carboxylate, and friends who are interested can also refer to it.

Reference:
Patent; INCYTE CORPORATION; WU, Liangxing; SHEN, Bo; LI, Jingwei; LI, Zhenwu; LIU, Kai; ZHANG, Fenglei; YAO, Wenqing; (120 pag.)WO2017/70089; (2017); 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. 851607-27-7, name is 5-Bromo-4-chloro-2-methoxypyridine. A new synthetic method of this compound is introduced below., Safety of 5-Bromo-4-chloro-2-methoxypyridine

Into a 30 mL sealed tube purged and maintained with an inert atmosphere of nitrogen, was placed 5-bromo-4-chloro-2-methoxypyridine (660 mg, 2.96 mmol, 1 eq), tert-butyl (2S)-2-methylpiperazine-l-carboxylate (1.2 g, 6 mmol, 2.02 eq), Pd2(dba) .CHCl (309 mg, 0.3 mmol, 0.10 eq), BINAP (372 mg, 0.60 mmol, 0.20 eq), t-BuONa (573 mg, 5.96 mmol, 2.01 eq) and toluene (4 mL). The resulting solution was stirred for 3 h at 95C in an oil bath. The crude mixture was concentrated and applied onto a silica gel column eluting with ethyl acetate/petroleum ether (1 :3). This resulted in 180 mg (18%) of tert-butyl (2S)-4-(4-chloro-6- methoxypyridin-3-yl)-2-methylpiperazine-l-carboxylate as yellow oil. LCMS: m/z = 342 [M+H]+.

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, 851607-27-7, 5-Bromo-4-chloro-2-methoxypyridine.

Reference:
Patent; PIPELINE THERAPEUTICS, INC.; XIONG, Yifeng; SCHRADER, Thomas; CHEN, Austin; ROPPE, Jeffrey Roger; BACCEI, Jill Melissa; BRAVO, Yalda; (199 pag.)WO2019/241131; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 6188-43-8, 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.6188-43-8, name is Imidazo[1,2-a]pyridine-3-carbaldehyde, molecular formula is C8H6N2O, molecular weight is 146.15, as common compound, the synthetic route is as follows.

b) (1S, 35)-N-(6-Fluoro-4-methylquinolin-2-yl)-N’-(imidazo [1, 2-a] pyridin-3- ylmethyl) cyclopentane-1, 3-diamine; (15, 3S)-N-(6-Fluoro-4-methylquinolin-2-yl) cyclopentane-1, 3-diamine (76 mg, 0.29 mmol) and imidazo [1, 2-a] pyridine-3-carbaldehyde (43 mg, 0.29 mmol) were dissolved in 2 mL of DCM and allowed to react for 4h. Sodium triacetoxyborohydride (112 mg, 0.53 mmol) was added and the mixture was stirred overnight. Much of the imine was left according to LC-MS. Sodium borohydride (50 mg, 1.3 mmol) was added and stirring was continued for 30 min. The mixture was acidified with 2M HCl and after 5 min the mixture was poured into water which was made alkaline with 2M NaOH. The mixture was extracted three times with EtOAc and the combined organic layer was washed with water, dried over Na2SO4, filtered and evaporated. The crude product was chromatographed on a 2 g Isolute Si column with DCM/MeOH/TEA 100/5/1. Yield: 91 mg (77%). 1H NMR (400 MHz, CDCl3) 6 8.29 (m, 1H), 7.60 (dd, 1H), 7.56 (m, 1H), 7.46 (s, 1H), 7.31 (dd, 1H), 7.23 (m, 1H), 7.13 (m, 1H), 6.77 (m, 1H), 6.46 (s, 1H), 4.85 (bd, 1H), 4.44 (m, 1H), 4.03 (s, 2H), 3.29 (m, 1H), 2.44 (bd, 3H), 2.27 (m, 1H), 2.10-1. 95 (m, 2H), 1.77 (m, 1H), 1.55-1. 35 (m, 2H). 13C NMR (100 MHz, CDC13) 6 159.9, 157.5, 156.9, 147.0, 145.7, 145.12, 145.08, 133.1, 129.2, 129.1, 125.7, 124.9, 124.8, 124.7, 123.3, 119.3, 119.1, 118.5, 113.0, 112.8, 108.6, 108.4, 58.6, 52.3, 43.0, 41.5, 33.1, 32.7, 19.7. LC-MS [M+H] + 390.2.

The chemical industry reduces the impact on the environment during synthesis 6188-43-8, I believe this compound will play a more active role in future production and life.

Reference:
Patent; ASTRAZENECA AB; WO2005/66132; (2005); 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.117873-72-0, name is 2,6-Dibromo-4-methoxypyridine, molecular formula is C6H5Br2NO, molecular weight is 266.92, as common compound, the synthetic route is as follows.COA of Formula: C6H5Br2NO

2,6-Dibromo-4-methoxy pyridine (6) was obtained in 80% yield when 2,4,6-tribromopyridine (5) was allowed to react with sodium methoxide (1.2 eq) in refluxing methanol. The compound (6) was treated using n-butyl lithium (1.2 eq.), was allowed to react with pivalonitrile (1.2 eq.) for 150 minutes at -78C and was refluxed for two hours in two normal sulfuric acid to yield ketone isomer (7) in 86% yield. An optically active alcohol (8) was obtained in 93% yield and in 90% ee optical purity from compound (7) through hydrogen transfer type asymmetric reduction of formic acid (4.3 eq.) and triethylamine (2.5 eq.) using the asymmetric ruthenium catalyst (RuCl[(S,S]-Tsdpen)(p-cumene), 0.01 eq.) as the catalyst. The compound (8) was converted to a camphor ester using the acid chloride, an optical resolution process was conducted using re-crystallization (75% yield, diastereomer ratio = >99/<1) and saponified again to obtain an almost optically pure alcohol (7, quant.). The compound (7) was subjected to homo coupling using a palladium catalyst [PdCl2(PhCN)2-TDAE] to yield a pyridine isomer (9) (Chemical formula 5) in 36% yield (diastereomer ratio =>99.5/<0.5). At the same time, in my other blogs, there are other synthetic methods of this type of compound,117873-72-0, 2,6-Dibromo-4-methoxypyridine, and friends who are interested can also refer to it. Reference:
Patent; Japan Science and Technology Agency; EP1724251; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem