Pyridine-derivatives

Electric Literature of 98027-84-0, 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 98027-84-0 as follows.

Example A: Synthesis of 5-[3-(2,6-dichloropyridin-4-ylll-3-(trifluoromethyl)-3,4-dihvdro-2H- pyrrol-5-vn-2-(1H-1,2,4-triazoI-1-vnbenzonitrile (No. 1-1)Step 1. Synthesis of ,,6-dichloro-4-(3.3.3-trifluoroprop-1-en-2-yl)pyridine.2,6-dichloro-4-iodopyridine (0.87 g), (3,3,3-trifluoroprop-1-en-2-yl)boronic acid (purity: 65%, 0.75 g) and potassium carbonate (0.96 g) were dissolved in the mixed solvent of THF and water, which was then degassed three times. To the solution was added dichlorobis(triphenylphosphine) palladium (II) (0.04 g), and the mixture was heated to reflux for 3 hours under argon atmosphere. The mixture was cooled to room temperature and then poured into water, which was then extracted twice with hexane. The organic layer was combined, which was then washed with water and dried over anhydrous magnesium sulfate. After the drying agent was filtered off, the solvent was distilled away under reduced pressure, and the residue was then purified by silica gel chromatography to obtain 2,6-dichloro-4-(3,3,3-trifluoroprop-1-en-2-yl)pyridine (0.70 g) at a yield of 82%.1H-NMR(CDC13)delta: 6.03 (1H, s), 6.21 (1H, s), 7.34 (2H, s)

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,98027-84-0, its application will become more common.

Reference:
Patent; BAYER CROPSCIENCE AG; MURATA, Tetsuya; YONETA, Yasushi; KISHIKAWA, Hidetoshi; MIHARA, Jun; YAMAZAKI, Daiei; HATAZAWA, Mamoru; SASAKI, Norio; DOMON, Kei; SHIMOJO, Eiichi; ICHIHARA, Teruyuki; SHIBUYA, Katsuhiko; ATAKA, Masashi; GOeRGENS, Ulrich; WO2010/133336; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 27048-04-0, Adding some certain compound to certain chemical reactions, such as: 27048-04-0, name is 6-Chloro-3-nitropyridin-2-amine,molecular formula is C5H4ClN3O2, 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 27048-04-0.

t-Butyl nitrite (8.5 g, 82.43 mmol, 1.80 equiv) was added to a mixture of6-chloro-3-nitropyridin-2-amine (8 g, 46.09 mmol, 1.00 equiv) and copper(II) bromide (12.3 g,55.07 mmol, 1.20 equiv) in acetonitrile (120 mL, 2.28 mol) under nitrogen. The resulting mixture was stilTed for 30 mm at 65 C and partitioned between ethyl acetate and 2 M aqueous hydrochloric acid. The organic layer was dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was purified by silica gel column chromatography eluting with ethylacetate/petroleum ether (1:5). This resulted in the title compound (8.2 g, 75%) as a yellow solid.

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. 27048-04-0, 6-Chloro-3-nitropyridin-2-amine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; GENENTECH, INC.; BLAQUIERE, Nicole; BURCH, Jason; CASTANEDO, Georgette; FENG, Jianwen A.; HU, Baihua; LIN, Xingyu; STABEN, Steven; WU, Guosheng; YUEN, Po-wai; WO2015/25026; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 1196157-51-3 ,Some common heterocyclic compound, 1196157-51-3, molecular formula is C6H5BrN2O2, 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.

N-Chlorosuccinimide (2.78 g, 20.8 mmol) was added to a solution of 2-amino-6-bromonicotinic acid (4.51 g, 20.8 mmol, Ark Pharm Inc. Arlington Heights, IL, USA) in DMF (75 mL), and the resulting mixture was heated at 70 C for 2.5 h. Heating was then stopped, and stirring was continued for 16 h. The reaction mixture was subsequently poured into ice water. After the ice had melted, the resulting slurry was filtered through a fritted glass funnel. The collected solids were air- dried, providing 2-amino-6-bromo-5-chloronicotinic acid: ?H NMR (400 MHz, DMSO-d6) oe 8.05 (s, 1H), 7.64 (br. s, 2H). m/z (ESI, +ve) 250.9 (M+H)

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. 1196157-51-3, 2-Amino-6-bromonicotinic acid, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; AMGEN INC.; LANMAN, Brian Alan; CEE, Victor J.; PICKRELL, Alexander J.; REED, Anthony B.; YANG, Kevin C.; KOPECKY, David John; WANG, Hui-Ling; LOPEZ, Patricia; ASHTON, Kate; BOOKER, Shon; TEGLEY, Christopher M.; (303 pag.)WO2018/119183; (2018); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 148493-37-2, 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. 148493-37-2, name is 2,6-Dichloro-3-iodopyridine. A new synthetic method of this compound is introduced below.

To a degassed solution of2,6-dichloro-3-iodopyridine (3.0 g, 11 mmol) and (E)-2-(2-ethoxyvinyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (2.2 g, 11 mmol) in 1,4- dioxane (20mL) and water (1.0 mL) was added CS2C03 (7.1 g, 22 mmol) and 1, 1′-bis(di-tertbutylphosphino)ferrocene palladium chloride (357 mg, 0.54 mmol) under N2 protection. The resulting mixture was heated to 70 oc and stirred at this temperature overnight. The reactionwas cooled, filtered through a pad of the celite and washed with ethyl acetate. The combinedfiltrate was evaporated in vacuo. The resulting residue was purified using columnchromatography (eluted with 0-20% EtOAc I DCM) to provide (E)-2,6-dichloro-3-(2-5 ethoxyvinyl)pyridine (1.96 mg, yield: 86%). MS (M+Ht: 218.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,148493-37-2, 2,6-Dichloro-3-iodopyridine, and friends who are interested can also refer to it.

Reference:
Patent; MERCK SHARP & DOHME CORP.; DAI, Xing; LIU, Hong; PALANI, Anandan; HE, Shuwen; BROCKUNIER, Linda L.; NARGUND, Ravi; MARCANTONIO, Karen; ZORN, Nicolas; XIAO, Dong; PENG, Xuanjia; LI, Peng; GUO, Tao; WO2014/121416; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 64119-42-2, 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. 64119-42-2, name is Ethyl 6-chloro-5-cyano-2-methylpyridine-3-carboxylate, molecular formula is C10H9ClN2O2, 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.

A solution of 7 (0.090 g, 0.4 mmol), tert-butyl hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (0.093 g, 0.44 mmol) and TEA (0.202 g, 2.0 mmol) in EtOH (2 mL) was heated in a microwave oven at 120 C for 20 minutes. The mixture was concentrated and the crude was purified by flash chromatography (heptane/EtOAc 3:1). Yield: 0.088 g (55%). 1H NMR (400MHz, CDCl3): 1.35 (3H, t, J = 7.1 Hz), 1.44 (9H, s), 2.68 (3H, s), 2.92-3.02 (2H, m), 3.24-3.35 (2H,m), 3.56-3.69 (2H, m), 3.72-3.79 (2H, m), 4.03-4.13 (2H, m), 4.28 (2H, q, J = 7.1 Hz), 8.30 (1H, s). MS m/z: 401 (M+1). tert-Butyl 5-[3-cyano-5-(ethoxycarbonyl)-6-methylpyridin-2-yl]hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (0.085 g, 0.21 mmol) was dissolved in TFA/DCM 1:1 (2 mL) and the reaction mixture was stirred at rt for 30 minutes and then concentrated. The crude material was dissolved in DCM (1 mL). TEA (0.106 g, 1.05 mmol) and benzenesulfonyl isocyanate (0.042 g, 0.23 mmol) were added at 0 C. The reaction mixture was stirred at 0 C for 10 minutes and then at rt for 1.5 h. The mixture was concentrated and the crude was purifed by reverse phase HPLC. Yield: 0.075 g (74%).

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 64119-42-2, Ethyl 6-chloro-5-cyano-2-methylpyridine-3-carboxylate.

Reference:
Article; Bach, Peter; Bostroem, Jonas; Brickmann, Kay; Van Giezen; Groneberg, Robert D.; Harvey, Darren M.; O’Sullivan, Michael; Zetterberg, Fredrik; European Journal of Medicinal Chemistry; vol. 65; (2013); p. 360 – 375;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 18368-64-4 ,Some common heterocyclic compound, 18368-64-4, molecular formula is C6H6ClN, 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.

2-Chloro-5-methylpyridine (10.03 g, 79 mmol), (3-chloro-4-methylphenyl)boronic acid (13.4 g, 79 mmol), and potassium carbonate (21.74 g, 157 mmol) were dissolved in the mixture of DME (150 ml) and water (20 ml) under nitrogen to give a colorless suspension. Pd(PPh3)4(0.909 g, 0.786 mmol) was added to the reaction mixture, then the reaction mixture was degassed and heated to 95° C. for 12 hrs. It was then cooled down to room temperature, separated organic phase and evaporated. The residue was subjected to column chromatography on silica gel column, eluted with heptanes/THF 9/1 (v/v), providing after crystallization from heptanes 10 g of 2-(3-chloro-4-methylphenyl)-5-methylpyridine (58percent yield) of white solid.

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. 18368-64-4, 2-Chloro-5-methylpyridine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Worldwide Show Corporation; Cai Ruiyi; Ji Zhiqiang; Ya Likexi·baolisuoweiqi·diyatejin; Xia Chuanjun; Lin Chun; Zeng Lichang; Wo Erte·yegeer; (191 pag.)CN107522748; (2017); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 81719-53-1, 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.81719-53-1, name is 3,5-Dichloropyridine-2-carboxylic Acid, molecular formula is C6H3Cl2NO2, molecular weight is 192, as common compound, the synthetic route is as follows.

3,5-dichloro-2-(chloromethyl)pyridine; [00376] To a 0 C solution of 5-chloropicolinic acid (5.00 g, 26.0 mmol) and N,N- dimethylformamide (1 drop) in dichloromethane (20 mL) was added oxalyl chloride (3.28 g, 26.0 mmol) dropwise, after which the reaction mixture was allowed to warm up to room temperature and stirred at that temperature for two hours. The reaction was then cooled again to 0 C, after which methanol (10 mL) was added dropwise to the reaction mixture, and the reaction was allowed to stir at room temperature for one hour where it was shown as complete by LCMS analysis. The reaction mixture was washed with saturated sodium bicarbonate solution, dried (magnesium sulfate), filtered and concentrated to afford methyl 3,5-dichloropyridine-2-carboxylate (5.36 g, 26.0 mmol, 100% yield ) as a white solid.[00377] To a 0 C solution of methyl 3,5-dichloropyridine-2-carboxylate (5.00 g, 24.3 mmol) in methanol (40 mL) was added sodium borohydride (1.80 g, 48.5 mmol), after which the reaction was warmed to room temperature and stirred at that temperature for two hours. The reaction mixture was then quenched by the addition of water (5 mL), concentrated to a residue, reconstituted in water (60 mL), extracted with ethyl acetate (2 x 60 mL), dried (magnesium sulfate), filtered and concentrated to afford (3,5-dichloropyridin-2-yl)methanol (2.90 g, 16.3 mmol, 67% yield ) as a viscous oil. This material was used in the subsequent step without any purification.[00378] To a 0 C solution of (3,5-dichloropyridin-2-yl)methanol (2.90 g, 16.3 mmol) in dichloromethane (50 mL) was added thionyl chloride (2.31 g, 19.6 mmol) dropwise, after which the reaction mixture was allowed to warm up to room temperature and stirred at that temperature for two hours. The reaction mixture was washed by the addition of saturated sodium bicarbonate solution (1 x 40 mL) and the organic layer was separated, dried (sodium sulfate), filtered and concentrated to a residue. Purification was achieved by silica gel chromatography using 9% ethyl acetate in hexanes to afford 3,5-dichloro-2- (chloromethyl)pyridine (2.40 g, 12.2 mmol, 75% yield) as an off-white solid. NMR (300 MHz, CDC13) delta (ppm): 8.36 (s, 1H), 7.56 (s, 1H), 4.66 (s, 2H).

Statistics shows that 81719-53-1 is playing an increasingly important role. we look forward to future research findings about 3,5-Dichloropyridine-2-carboxylic Acid.

Reference:
Patent; IRONWOOD PHARMACEUTICALS, INC.; HUDSON, Colleen; BARDEN, Timothy, C.; JIA, James; MERMERIAN, Ara; PENG, Bo; YANG, Jane; YU, Xiang, Y.; SPROTT, Kevin; WO2012/88469; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 14432-12-3, 4-Amino-2-chloropyridine, 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 14432-12-3, blongs to pyridine-derivatives compound. Product Details of 14432-12-3

2-Chloro-pyridin-4-ylamine 1b* (3.2 g, 0.025 mol) and sodium acetate (4.1 g, 0.05 mol) were stirred in acetic acid (20 ml). A solution of iodine monochloride (4.1 g, 0.025 mol) in acetic acid (10 ml) was added and the reaction mixture was heated to 70 C for approximately 3 h (NB: solution at -50 C, brown colour faded and precipitate formed as the reaction proceeded). The reaction mixture was cooled to room temperature, then poured onto water (700 ml), and extracted with EtOAc. The organic layer was carefully washed with a solution of Na2CO3 followed by a solution of Na2S2O3, dried over MgSO4 and concentrated in vacuo. The crude product was purified by column chromatography using 10% EtOAc in DCM to yield 2-chloro-5-iodo-pyridin-4-ylamine 2b* (2.60 g, 40%). 1H NMR (400 MHz, CDCl3) delta (ppm): 8.34 (1 H, s), 6.63 (1 H, s), 4.78 (2 H, s).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,14432-12-3, 4-Amino-2-chloropyridine, and friends who are interested can also refer to it.

Reference:
Patent; MAX-PLANCK-GESELLSCHAFT ZUR FOeRDERUNG DER WISSENSCHAFTEN E.V.; ULLRICH, Axel; FALCENBERG, Mathias; WO2014/207260; (2014); 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.59786-31-1, name is Methyl 3-bromoisonicotinate, molecular formula is C7H6BrNO2, molecular weight is 216.03, as common compound, the synthetic route is as follows.Computed Properties of C7H6BrNO2

Step A Preparation of 3-(4-cyanobenzyl)pyridin-4-carboxylic acid methyl ester A solution of 4-cyanobenzyl bromide (625 mg, 3.27 mmol) in dry THF (4 mL) was added slowly over ~3 min. to a suspension of activated Zn (dust; 250 mg) in dry THF (2 mL) at 0° under an argon atmosphere. The ice-bath was removed and the slurry was stirred at room temperature for a further 30 min. Then 3-bromopyridin-4-carboxylic acid methyl ester (540 mg. 2.5 mmol) followed by dichlorobis(triphenylphosphine)nickel (II) (50 mg). The resultant reddish-brown mixture was stirred for 3 h at ~40°-45° C. The mixture was cooled and distributed between EtOAc (100 ml,) and 5percent aqueous citric acid (50 mL). The organic layer was washed with H2 O(2*50 mL), dried with Na2 SO4. After evaporation of the solvent the residue was purified on silica gel, eluding with 35percent EtOAc in hexane to give 420 mg as a clear gum. FAB ms (M+1)253.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,59786-31-1, Methyl 3-bromoisonicotinate, and friends who are interested can also refer to it.

Reference:
Patent; Merck & Co., Inc.; US5859012; (1999); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 1219095-87-0, tert-Butyl (2-methylpyridin-3-yl)carbamate, 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, 1219095-87-0, blongs to pyridine-derivatives compound. Recommanded Product: 1219095-87-0

Tert-butyl N-(2-methylpyridin-3-yl)carbamate (5.41 g, 25.99 mmol) was dissolved in AcOH (100 mL). PtO2 (2.7 g) was added and the mixture was stirred overnight under H2 atmosphere (4 atm). The catalyst was filtered off, the solvent was evaporated and the residue neutralized with K2CO3 solid. The mixture was extracted with ethyl acetate (3×250 mL) and DCM (3×100 mL). The combined organic phases was concentrated under reduced pressure to give tert-butyl N-(2- methylpiperidin-3-yl)carbamate (7.0 g, quant. yield) as diastereoisomeric mixture. The diastereoisomeric mixture was purified by preparative chiral HPLC to give: tert-butyl N-[(2S,3S)-2-methylpiperidin-3-yl]carbamate (1.94 g, 9.05 mmol), tert-butyl N- [(2R,3R)-2-methylpiperidin-3-yl]carbamate (1.39 g, 6.48 mmol).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1219095-87-0, its application will become more common.

Reference:
Patent; PHARMACYCLICS LLC.; ATALLAH, Gordana, Babic; CHEN, Wei; JIA, Zhaozhong, J.; POZZAN, Alfonso; RAVEGLIA, Lucal, Francesco; ZANALETTI, Riccardo; (815 pag.)WO2016/196776; (2016); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem