Pyridine-derivatives

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.1570-45-2, name is Ethyl isonicotinate, molecular formula is C8H9NO2, molecular weight is 151.16, as common compound, the synthetic route is as follows.COA of Formula: C8H9NO2

In an autoclave, the reactant and Ru(acac)3 were dissolved with 1.4 equivalents of tris(diphenylphosphinomethyl)ethane in isopropanol, and converted at 150 C. and 150 bar of hydrogen pressure for 24 h. After the reaction, the reaction mixture was analyzed by gas chromatography.Conversion, selectivity and yield were determined by means of gas chromatography. Substrates, batch sizes and analysis are compiled in Table 1.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1570-45-2, Ethyl isonicotinate, and friends who are interested can also refer to it.

Reference:
Patent; BASF SE; US2009/43102; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 1003711-85-0, 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.1003711-85-0, name is 5-Bromo-4-chloro-2-methylpyridine, molecular formula is C6H5BrClN, molecular weight is 206.47, as common compound, the synthetic route is as follows.

4-Chloro-2-fluoro-N-(2-methoxy-phenyl)-N-methyl-5-(4,4,5,5- tetramethyl-[1 ,3]dioxolan-2-yl)-benzenesulfonamide (57 mg, 0.125 mmol), 5-bromo-4- chloro-2-methyl-pyridine (21 mg, 0.1 mmol), Pd(Ph3P)4 (12 mg, 0.01 mmol), K2CO3 (69 mg, 0.5 mmol) in a mixture of dioxane (1.5 ml.) and water (0.15 ml.) was degassed with N2 for 5 min. The reaction vessel was sealed and heated at 85 0C for 14 hrs. After the filtration, the mixture was purified by prep. LCMS to afford 4-chloro-5-(4- chloro-6-methyl-pyridin-3-yl)-2-fluoro-N-(2-methoxy-phenyl)-N-methyl- benzenesulfonamide 3-1. MS: 454.7 (M+H)+; tR = 7.77 min (method 2). NMR (CDCI3), delta, 8.350 (1 H, s), 7.549(1 H, d, J=6.9Hz), 7.257-7.436 (5H, m), 6.932 (1 H, m), 6.817 (1 H, m), 3.513 (3H, s), 3.389 (3H, d, J=2.1 Hz), 2.656 (3H, s).

The chemical industry reduces the impact on the environment during synthesis 1003711-85-0, I believe this compound will play a more active role in future production and life.

Reference:
Patent; NEUROCRINE BIOSCIENCES, INC.; WO2008/124614; (2008); 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. 913836-16-5, name is 5-Bromo-2-hydroxyisonicotinic acid. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C6H4BrNO3

[0717] XXV-6 was obtained following the synthetic scheme as described above. MS (ES) m/z (M+H) 231.95.

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, 913836-16-5, 5-Bromo-2-hydroxyisonicotinic acid.

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

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. 59020-10-9, name is 3-(Tributylstannyl)pyridine. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C17H31NSn

147a. 6-Chloro-3-(1-methyl-2-(S)-pyrrolidinylmethoxy)-5-(3-pyridyl)pyridine To a solution of 3-(1-methyl-2-(S)-pyrrolidinylmethoxy)-5-bromo-6-chloropyridine (500 mg, 1.28 mmol) in toluene (10 mL) was added 3-pyridinyltributyltin (564 mg, 1.54 mmol) and tetrakis(triphenylphosphine)palladium(0) (45 mg, 0.04 mmol). After being heated under reflux for 16 h, the resulting mixture was cooled to room temperature. Solvent was removed, and the residue was chromatographed (silica gel; EtOAc/hexane, 2:19 to 1:1) to afford an oil (428 mg, 86%): 1 H NMR (CDCl3, 300 MHz) delta1.45 (s, 9H), 1.94 (m, 1H), 1.98-2.10 (m, 2H), 3.31-3.45 (m, 2H), 3.88-4.30 (m, 4H), 7.22 (m, 1H), 7.40 (m, 1H), 7.83 (td, 1H, J=1.5, 9.0 Hz), 8.16 (d, 1H, J =3.0 Hz), 8.64-8.73 (m, 2H); MS (CI/NH3) m/z 390 (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, 59020-10-9, 3-(Tributylstannyl)pyridine.

Reference:
Patent; Abbott Laboratories; US6127386; (2000); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 77199-09-8, 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.77199-09-8, name is Ethyl 5-bromopicolinate, molecular formula is C8H8BrNO2, molecular weight is 230.0586, as common compound, the synthetic route is as follows.

General procedure: A mixture 2a or 2b (1 g, 1 equiv.), anappropriate pinacol boronate ester (1.2 equiv.), [1,10-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex withdichloromethane (10 mol %), cesium carbonate (2.0 equiv.), 1,4-dioxane (8 ml) and water (4 ml) was sealed in a 20 ml microwavereaction vial (Biotage). The vial was irradiated in a microwaveapparatus at 110 C, normal absorption for 30-90 min. The reactionmixture was cooled to room temperature and work up was performedas described in method 1 to obtain the esters 4b-i.

Statistics shows that 77199-09-8 is playing an increasingly important role. we look forward to future research findings about Ethyl 5-bromopicolinate.

Reference:
Article; Tung, Truong Thanh; Jakobsen, Tim Holm; Dao, Trong Tuan; Fuglsang, Anja Thoe; Givskov, Michael; Christensen, S°ren Br°gger; Nielsen, John; European Journal of Medicinal Chemistry; vol. 126; (2017); p. 1011 – 1020;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 1532517-95-5, 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. 1532517-95-5, name is 5-Bromo-3-fluoro-2-nitropyridine. A new synthetic method of this compound is introduced below.

A solution of 5-bromo-3-fluoro-2-nitropyridine (400 mg, 1.81 mmol) and 2-methoxyethanamine (408 mg, 5.43 mmol) in tetrahydrofuran (10 mL) was stirred at 25 C. for 2 hours, whereupon it was diluted with ethyl acetate (100 mL) and washed with water (50 mL). The organic layer was washed with saturated aqueous sodium chloride solution (50 mL), dried over magnesium sulfate, filtered, and concentrated to afford C18 as a yellow solid. Yield: 430 mg, 1.56 mmol, 86%.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1532517-95-5, 5-Bromo-3-fluoro-2-nitropyridine, and friends who are interested can also refer to it.

Reference:
Patent; Pfizer Inc.; Aspnes, Gary Erik; Bagley, Scott W.; Curto, John M.; Edmonds, David James; Flanagan, Mark E.; Futatsugi, Kentaro; Griffith, David A.; Huard, Kim; Lian, Yajing; Limberakis, Chris; Londregan, Allyn T.; Mathiowetz, Alan M.; Piotrowski, David W.; Ruggeri, Roger B.; (127 pag.)US2019/382384; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 58481-17-7, 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 58481-17-7, name is Methyl 2-(hydroxymethyl)isonicotinate. This compound has unique chemical properties. The synthetic route is as follows.

Methyl 2-(hydroxymethyl)isonicotinate (8.36 g, 50 mmol) was dissolved in dichloromethane (150 ml_). Dess-Martin periodinane (25 g, 58.94 mmol) was added and the mixture stirred at room temperature for 2 h 30 min. Sodium sulfothioate (59.3 g, 375.00 mmol) was dissolved in satd NaHCO3 and added to the reaction mixture. The suspension was vigorously stirred at room temperature for 15 min, DCM was added and the phases were separated. The aqueous phase was extracted with DCM twice and the combined organic layers were dried over MgSO and evaporated. The residue was purified by automated flash chromatography on a Biotage KP-SIL 340g column. Gradient heptanes / EtOAc 80:20 to 65:35 over 5 CV was used as mobile phase. Methyl 2-formylisonicotinate (7 g, 85 %) was isolated as an off-white solid. 1H NMR (400 MHz, cdcl3) delta 4.00 (s, 3H), 8.09 (dd, 1 H), 8.49 (s, 1 H), 8.95 (d, 1 H), 10.15 (s, 1 H). MS m/z 165 (M+H)+

According to the analysis of related databases, 58481-17-7, the application of this compound in the production field has become more and more popular.

Reference:
Patent; ASTRAZENECA AB; CHENG, Leifeng; SCHELL, Peter; WO2012/47156; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 856851-48-4, 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 856851-48-4 as follows.

Hydrogen peroxide-urea complex (31 .04 g, 330 mmol) was added in one portion to a solution of 2-chloro-5-ethoxypyridine (26.0 g, 1 65 mmol) in dichloromethane (250 mL) at 0 00 then trifluoroaceticanhydride (62.4 g, 297 mmol, 41 .3 0 mL) was added dropwise. The mixture was stirred at 20 00 for 16 h. The reaction mixture was quenched by addition of saturated aqueous sodium thiosulfate (150 mL). The mixture was extracted with dichloromethane (200 mL x 3), then the combined organic phases were washed with saturated aqueous sodium chloride solution (100 mL), dried over anhydrous sodium sulfate, filtered and concentrated to give a crude residue that was purified by chromatography (silica, petroleumether : ethyl acetate 1:0 to 1:2) to give 2-chloro-5-ethoxypyridine 1-oxide (22.0 g, 126.7 mmol, 77%) as a yellow solid. 1H NMR (400 MHz, ODd3) O 8.05 (d, J2.6 Hz, 1 H), 7.29 (d, J9.0 Hz, 1 H), 6.81 (dd, J2.6, 9.1 Hz, 1 H), 3.97 (q, J6.9 Hz, 2H), 1 .37 (t, J7.0 Hz, 3H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,856851-48-4, its application will become more common.

Reference:
Patent; YUMANITY THERAPEUTICS; LUCAS, Matthew; LE BOURDONNEC, Bertrand; WRONA, Iwona; PANDYA, Bhaumik; TIVITMAHAISOON, Parcharee; OZBOYA, Kerem; VINCENT, Benjamin; TARDIFF, Daniel; PIOTROWSKI, Jeff; SOLIS, Eric; SCANNEVIN, Robert; CHUNG, Chee-Yeun; ARON, Rebecca; RHODES, Kenneth; (489 pag.)WO2018/81167; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 696-42-4, 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. 696-42-4, name is 5-Fluoronicotinonitrile, molecular formula is C6H3FN2, 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.

Produced in Reference Example 33 3- (piperidin-4-yl)-lH-pyrazol-5-amine hydrochloride (0.400 g, 1.67 mmol) in dimethyl sulfoxide (4 mL) suspension of 1,8 – diazabicyclo [5.4.0] -7-undecene (0.750mL, 5.02mmol) was added, and the mixture was stirred for 10 minutes at room temperature.Then, 3,6-dichloro pyridazine (0.249 g, 1.67 mmol) and the mixture was stirred for 4 hours at 1 hour, 60 C. at room temperature.After cooling to room temperature, water was added to the reaction mixture, and the mixture was extracted with ethyl acetate.The resulting organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, under reduced pressure, and the solvent was evaporated.The obtained residue was purified by silica gel column chromatography to obtain [eluent: ethyl acetate / methanol = 95 / 5-90 / 10 (gradient) to give the title compound (71% 0.330 g, yield) It was.Instead of 3,6-dichloro-pyridazine, 5-fluoro-3-carbonitrile (0.204 g, 1.67 mmol) using, the same procedure was followed as the method described in Reference Example 34, the title compound ( 0.167g, yield: 37%) was obtained.

According to the analysis of related databases, 696-42-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Daiichi Sankyo company limited; Sato, Rie; Kobayashi, Katsuhiro; Kaneko, Toshio; (188 pag.)JP2015/113323; (2015); 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. 107351-82-6, name is 2-Bromo-5-phenylpyridine, the common compound, a new synthetic route is introduced below. Recommanded Product: 2-Bromo-5-phenylpyridine

Reference Example 56 2-(5-Phenyl-pyridin-2-yl)-propionic acid methyl ester STR209 The desired compound was obtained from 2-bromo-5-phenylpyridine (M. G. Knize, et al., Heterocycles, 24, 1815 (1986)) by the known method described in T. Sakamoto, et al., Heterocycles, 36, 2509 (1993). 1 H-NMR (270 MHz, CDCl3) delta ppm: 1.61(d, 3H, J=7.3 Hz), 3.72(s, 3H), 4.01(q, 1H, J=7.3 Hz), 7.34-7.59(m, 6H, 7.85 (dd, 1H, J=8.2, 2.3 Hz), 8.78(d, 1H, J=2.3 Hz)

The synthetic route of 107351-82-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Sumitomo Pharmaceutical Company, Limited; US6100260; (2000); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem