Day: April 8, 2022

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. 55404-31-4, name is 3-Bromo-2-chloro-4-methylpyridine. A new synthetic method of this compound is introduced below., Quality Control of 3-Bromo-2-chloro-4-methylpyridine

Example 193; Synthesis of 3-bromo-4-methylpyridin-2(1H)-one; To a resealable pressure vessel charged with 3-bromo-2-chloro-4-picoline (1.200 g, 5.81 mmol) was added formic acid (13.1 ml, 348 mmol) and water (4.00 ml, 222 mmol). The tube was sealed and the solution heated to 1200C. After 72 hrs, the solution was cooled to RT and concentrated in vacuo. The residue was purified by reverse phase chromatography (neutral) to afford 3-bromo-4- methylpyridin-2(1H)-one as a white solid. M+H+ = 188.0.

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, 55404-31-4, 3-Bromo-2-chloro-4-methylpyridine.

Reference:
Patent; AMGEN INC.; WO2008/11109; (2008); A2;,
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. 64951-08-2, name is Imidazo[1,2-a]pyridine-2-carboxylic acid, molecular formula is C8H6N2O2, 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. Product Details of 64951-08-2

To a solution of imidazo[l,2-a]pyridine-2-carboxylic acid (262 mg, 1.62 mmol) in N,N-dimethylformamide (5 mL) was added l-[bis(dimethylamino)methylene]-lH-l,2,3- triazolo[4,5-b]pyridinium 3-oxid hexafluorophosphate (HATU, 616 mg, 1.62 mmol), ethyldiisopropylamine (697mg, 5.40 mmol). The resulting mixture was stirred at room (0804) temperature for 30 min. Ethyl 2-((2S,4tf)-4-((((9H-fluoren-9-yl) (0805) methoxy)carbonyl)amino)pyrrolidin-2-yl)thiazole-4-carboxylate (500 mg, 1.08 mmol) was added. The mixture was stirred at room temperature for 12 h. The mixture was concentrated, dissolved in ethyl acetate, washed with 1 N lithium chloride. The organic layer was concentrated to give ethyl 2-((2S,4 ?)-4-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-l-(imidazo[l,2- a]pyridine-2-carbonyl)pyrrolidin-2-yl)thiazole-4-carboxylate as a brown solid. MS(ESI) m/z 608.2 [M + H]+.

With the rapid development of chemical substances, we look forward to future research findings about 64951-08-2.

Reference:
Patent; DYAX CORP.; TRAVINS, Jeremy; MILLER, Thomas; PAPAIOANNOU, Nikolaos; (199 pag.)WO2019/28362; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 57883-25-7, 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 57883-25-7, name is 3-Bromo-2-ethoxypyridine. This compound has unique chemical properties. The synthetic route is as follows.

Example 1 1.0034-{2-[(2-ethoxypyridin-3-yl)amino][1 ,2,4]triazolo[1 ,5-a]pyridin-6-yl}-N- 2,2,2-trifluoroethyl)benzamide4-(2-Amino[1 ,2,4]triazolo[1 ,5-a]pyridin-6-yl)-N-(2,2,2-trifluoroethyl)benzamide Int9.2 (100 mg), 3-bromo-2-ethoxypyridine Int22.1 (72 mg), chloro(2-dicyclo- hexylphosphino-2′,4′,6′-tri-i-propyl-1 , 1 ‘-biphenyl)[2-(2-aminoethyl)phenyl] palladium(ll) (22 mg), X-Phos (14 mg), and sodium tert-butoxide (52.3 mg) were pre-mixed, and degassed toluene (2.2 mL) was added. The mixture was heated for 6h to 130 C. Subsequently, DCM was added, and the mixture was washed with satd. aqueous Na2C03 solution. The organic layer was dried over Na2S04, and the solvent was evaporated. The crude product was purified by flash chromatography on silica gel (eluent: ethyl acetate / ethanol gradient 50: 1 to 20: 1 ) to yield 86 mg (63%) of the title compound.1 H-NMR (400MHz, DMSO-d6): delta [ppm]= 1 .41 (t, 3H), 4.08 – 4.18 (m, 2H), 4.42 (q, 2H), 7.01 (dd, 1 H), 7.70 – 7.75 (m, 2H), 7.95 – 8.06 (m, 5H), 8.35 (s, 1 H), 8.53 (dd, 1 H), 9.18 (t, 1 H), 9.30 (s, 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 57883-25-7, 3-Bromo-2-ethoxypyridine.

Reference:
Patent; BAYER SCHERING PHARMA AKTIENGESELLSCHAFT; KOPPITZ, Marcus; SCHULZE, Volker; KOSEMUND, Dirk; SCHIROK, Hartmut; BADER, Benjamin; LIENAU, Philipp; MARQUARDT, Tobias; WEGSCHEIDT-GERLACH, Christof; SIEMEISTER, Gerhard; PRECHTL, Stefan; WENGNER, Antje; BOeMER, Ulf; WO2011/64328; (2011); 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. 64951-08-2, name is Imidazo[1,2-a]pyridine-2-carboxylic acid, molecular formula is C8H6N2O2, 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. Recommanded Product: Imidazo[1,2-a]pyridine-2-carboxylic acid

Step (e) N-{4-[6-fluoro-2,4-dioxo-l-[3-(pyridin-3-ylethynyl)phenyl]-l,4- dihydropyrido[2,3-d]pyrimidin-3(2H)-yl]cyclohexyl}imidazo[l,2-a]pyridine-2- carboxamideTo a mixture of imidazo[l,2-a]pyridine-2-carboxylic acid (1 lOmg, 0.68mmol), HATU (250mg, 0.66mmol) and 3-(4-aminocyclohexyl)-6-fluoro-l-[3-(pyridin- 3ylethynyl)phenyl]-pyrido[2,3-d]pyrimidine-2,4(lH,3H)-dione dihydrochloride (230mg, 0.44mmol) in Chloroform was added ethyl-di-isopropylamine (0.38ml, 2.2mmol) over a period of 20 seconds. Stirring was continued at ambient temperature for 15 hours. Water was added to the clear solution and the mixture was concentrated under reduced pressure using a rotary evaporator. The obtained solid was filtered and dissolved in acetonitrile. Purification on preparative HPLC resulted in the title compounds as an off white solid (45mg, 17%). 1U NMR (DMSO-ck): delta 8.75 (IH, s); 8.55 – 8.62 (3H, m); 8.38 (IH, s); 8.34 (IH, dd); 7.98 (IH, ddd); 7.57 – 7.74 (4H, m); 7.44 – 7.52 (2H, m); 7.33 (IH, brdd); 6.98 (IH, brdd); 4.87 (IH, bt); 4.18 (IH, bs); 2.54 – 2.69 (2H, brm); 2.00 (2H, brd); 1.59 – 1.79 (4H, m). APCI-MS m/z: 599 [MH+].

With the rapid development of chemical substances, we look forward to future research findings about 64951-08-2.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2008/84223; (2008); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 107867-51-6, 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. 107867-51-6, name is 5-(Trifluoromethyl)pyridine-2,3-diamine. A new synthetic method of this compound is introduced below.

To a vial were added l-(4-(methoxycarbonyl)phenyl)cyclobutanecarboxylic acid (25 mg, 0.11 mmol), 5-(trifluoromethyl)pyridine-2,3-diamine (28.4 mg, 0.160 mmol), HATU (60.9 mg, 0.160 mmol), DMF (800 mu) and DIEA (70 mu, 0.40 mmol). The mixture was heated at 130 C for 20 h. The mixture was filtered and purified by reversed phase HPLC, eluting with ACN/water (0.1%TFA) to afford the title compound as the TFA salt. MS (EI) m/z 376 [M+H] .

At the same time, in my other blogs, there are other synthetic methods of this type of compound,107867-51-6, 5-(Trifluoromethyl)pyridine-2,3-diamine, and friends who are interested can also refer to it.

Reference:
Patent; MERCK SHARP & DOHME CORP.; ZHOU, Hua; ACHAB, Abdelghani; FRADERA, Xavier; HAN, Yongxin; LI, Derun; MCGOWAN, Meredeth, A.; SCIAMMETTA, Nunzio; SLOMAN, David, L.; YU, Wensheng; (98 pag.)WO2019/27855; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 23056-47-5, 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.23056-47-5, name is 2-Bromo-4-methyl-5-nitropyridine, molecular formula is C6H5BrN2O2, molecular weight is 217.02, as common compound, the synthetic route is as follows.

Step 1 [0610] A suspension of 2-bromo-4-methyl-5-nitropyridine (XIV) (200 g, 921 mmol, 1.00 eq) and NH4C1 (240 g, 4.49 mol, 4.87 eq) in EtOH (3.50 L) and water (150 mL) was heated with stirring to 50C. To this mixture was added Fe ( 120 g, 2.15 mol, 2.33 eq) and HC1 (10.2 g, 279 mmol, 0.30 eq). The suspension was then heated to 80C for another 3 h. The reaction was cooled to 25C and filtered through a plug of Celite. The filtrate was concentrated under reduced pressure to yield a residue that was taken up in EtOAc (1 L x 3) and washed with brine. The organic layer was dried over sodium sulfate, filtered and concentrated under reduced pressure to give 6-bromo-4-methylpyridin-3 -amine (XV) as brown solid (167.9 g, 898 mmol, 97.4% yield) which was used for the next step without any purification. l NMR (CDC , 400 MHz) delta ppm 2.15 (s, 3H), 3.44 (br s, 2H), 7.14 (s, 1H), 7.78 (s, 1H); ESIMS found for C6H7BrN2 mlz 186.8 (M+H).

The chemical industry reduces the impact on the environment during synthesis 23056-47-5, I believe this compound will play a more active role in future production and life.

Reference:
Patent; SAMUMED, LLC.; KC, Sunil Kumar; WALLACE, David Mark; CAO, Jianguo; CHIRUTA, Chandramouli; HOOD, John; (261 pag.)WO2017/23984; (2017); 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. 135450-23-6, name is 6-(Chloromethyl)-2-cyanopyridine. This compound has unique chemical properties. The synthetic route is as follows. Application In Synthesis of 6-(Chloromethyl)-2-cyanopyridine

Intermediate HU (1754) 6-((2-Bromophenoxy)methyl)picolinonitrile (1755) To a sealable 4 mL vial, containing 6-(chloromethyl)picolinonitrile (100 mg, 0.66 mmol) and 2-bromophenol (113 mg, 0.66 mmol), were added Cs2CO3 (320 mg, 0.98 mmol) and acetonitrile (1.7 mL). The vial was then heated at 80 Celsius for 15 hours. The reaction was then diluted with ethyl acetate, filtered through a celite plug and concentrated to dryness. The material was used without further purification. 1H NMR (500 MHz, CDCl3) delta 8.02-7.93 (m, 1H), 7.93-7.85 (m, 1H), 7.65-7.59 (dd, J=7.7, 1.1, 1H), 7.58-7.53 (dd, J=7.9, 1.6, 1H), 7.29-7.22 (m, 1H), 6.93-6.90 (dd, J=8.3, 1.3, 1H), 6.90-6.86 (m, 1H), 5.23 (s, 2H).

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, 135450-23-6, 6-(Chloromethyl)-2-cyanopyridine.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; Bacani, Genesis M.; Eccles, Wendy; Fitzgerald, Anne E.; Goldberg, Steven D.; Hack, Michael D.; Hawryluk, Natalie A.; Jones, William M.; Keith, John M.; Krawczuk, Paul; Lebsack, Alec D.; Lee-Dutra, Alice; Liu, Jing; McClure, Kelly J.; Meduna, Steven P.; Pippel, Daniel J.; Rosen, Mark D.; Sales, Zachary S.; US2015/259357; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 119248-43-0, 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 119248-43-0, name is 1H-Pyrrolo[3,2-c]pyridine-3-carboxylic acid. This compound has unique chemical properties. The synthetic route is as follows.

Example 83 (2-Methyl-3-phenyl-2,4,5,7-tetrahydro-6H-pyrazolo[3,4-c]pyridin-6-yl)(1H-pyrrolo[3,2-c]pyridin-3-yl)methanone The title compound was prepared in a manner analogous to Example 1, using 1H-pyrrolo[3,2-c]pyridine-3-carboxylic acid instead of 1-naphthoic acid, triethylamine instead of DIPEA, and ethyl acetate instead of DCM. MS (ESI): mass calcd. for C21H19N5O, 357.2; m/z found, 358.3 [M+H]+. 1H NMR (500 MHz, DMSO-d6) delta 12.51-11.44 (m, 1H), 9.02-8.91 (m, 1H), 8.25-8.14 (m, 1H), 7.94-7.79 (m, 1H), 7.56-7.36 (m, 6H), 4.75 (s, 2H), 3.93-3.77 (m, 2H), 3.73 (s, 3H), 2.72-2.59 (m, 2H).

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 119248-43-0, 1H-Pyrrolo[3,2-c]pyridine-3-carboxylic acid.

Reference:
Patent; Janssen Pharmaceutica NV; Ameriks, Michael K.; Chen, Gang; Huang, Chaofeng; Laforteza, Brian Ngo; Ravula, Suchitra; Southgate, Emma Helen; Zhang, Wei; US2020/102303; (2020); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 83766-88-5, 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 83766-88-5 as follows.

Carboxylic acid (0.2 g, 1.64 mmol), tert-butoxypyridine (0.33 g, 2.21 mmol) and boron trifluoride diethyl etherate (0.31 g, 2.21 mmol) in dry PhCH3 (2 mL) were added to a 20-ml vial. The reaction mixture was then allowed to stir at room temperature for 30 min before quenching with anhydrous NaHCO3. The reaction mixture was diluted with ethyl acetate (30 mL), then washed with water (20 mL), followed by brine (20 mL). The organic layer was dried over anhydrous sodium sulfate and carefully concentrated under reduced pressure. The resulting residue was then purified by flash column chromatography on silica gel with 0:4 to 1:4 dichloromethane/hexane as eluent to yield the desired product 5a as a colorless oil.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,83766-88-5, its application will become more common.

Reference:
Article; La, Minh Thanh; Kim, Hee-Kwon; Tetrahedron; vol. 74; 27; (2018); p. 3748 – 3754;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 858116-66-2, 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.858116-66-2, name is 5-Bromo-1-(triisopropylsilyl)-1H-pyrrolo[2,3-b]pyridine, molecular formula is C16H25BrN2Si, molecular weight is 353.3726, as common compound, the synthetic route is as follows.

To a 50 ml reaction flask at room temperature, the compound of formula II (4.08 g, 11.5 mmol) was added, Copper acetylacetonate (0.15g, 0.575mmol), BetaEtaMuRhoO (0.15g, 0 · 575mmol), lithium hydroxide monohydrate (2 · 42g, 57.5mmol), 18ml of DMSO, 4.5ml of water, stirring was turned on, replaced with nitrogen, and the temperature was raised to an internal temperature of 100 C. Temperature reaction for 6 hours. Control raw material reaction is over, stop heating, cool to room temperature (20-30 C), add water 100ml, adjust PH to 6 with 2N dilute hydrochloric acid, precipitation of solids, suction filtration, aqueous phase with ethyl acetate 50ml * 3 Extraction, combining the organic phases, washing once with water and saturated aqueous sodium chloride solution, drying over anhydrous sodium sulfate, and concentrating the solvent to obtain the compound of formula III. Yield: 1.2 g, yield: 78.5%.

The chemical industry reduces the impact on the environment during synthesis 858116-66-2, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Shanghai Hongbozhiyuan Pharmaceutical Co., Ltd.; Zhuang Yinqiang; Peng Shaoping; Jiang Hui; (11 pag.)CN107434807; (2017); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem