Pyridine-derivatives

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. 905273-87-2, name is 6-Chloro-N,N-diisopropylnicotinamide, molecular formula is C12H17ClN2O, 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. category: pyridine-derivatives

To a stirred solution of diisopropylamine (1 g, 9.88 mmol, 4.76 equiv) in ether (30 mL) at -50C maintained under nitrogen was added a 2.5 M solution of n-BuLi (5 mL) in hexanes dropwise The reaction mixture was stirred for 30 min a -50C then solid 6- chloro-N,N-bis(propan-2-yl)pyridine-3-carboxamide (500 mg, 2.08 mmol, 1.00 equiv) was added in a single portion. The resulting solution was stirred for 30 min at -50C DMF (1 mL) was then added dropwise with stirring. The reaction mixture was stirred at -50C for 3 h and then warmed to rt and stirred overnight. The reaction was quenched by the addition of 10% aqueous citric acid solution (30 mL) and then extracted with 2×50 mL of ether. The combined organic layers were dried over anhydrous sodium sulfate and concentrated under vacuum to give 0.5 g of crude 6-chloro-4-formyl-N,N-bis(propan-2-yl)pyridine-3-carboxamide as a yellow solid. LC/MS (Method G, ESI): RT= 1.40 min, m/z = 269.0 [M+H]+.

With the rapid development of chemical substances, we look forward to future research findings about 905273-87-2.

Reference:
Patent; GENENTECH,INC.; FORMA TM, LLC; BAIR, Kenneth W.; BAUMEISTER, Timm R.; BUCKMELTER, Alexandre J.; CLODFELTER, Kanl H.; DRAGOVICH, Peter; HAN, Bingsong; LIN, Jian; LIU, Xiongcai; REYNOLDS, Dominic J.; SMITH, Chase C.; WANG, Zhongguo; YUEN, Po-Wai; ZAK, Mark; ZHANG, Yamin; ZHENG, Xiaozhang; ZHAO, Guiling; WO2013/127268; (2013); A1;,
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. 886371-28-4, name is 3-Bromo-6-chloroimidazo[1,2-a]pyridine, the common compound, a new synthetic route is introduced below. COA of Formula: C7H4BrClN2

General procedure: To an oven-dried 5 mL microwave vessel was addedPd(dppf)Cl2·CH2Cl2 (4 mol%), aryl halide/pseudohalide (1equiv.), organoboron (1 equiv.), and K3PO4 (3 equiv.). The vesselwas then capped and purged with N2 before addition of DMI (1mL, 0.25 M) and H2O (5 equiv.). The reaction mixture washeated to 60 C and maintained at this temperature with stirringfor 1 h before the vessel was vented and decapped. Thesolution was then diluted with EtOAc (10 mL) and washed withwater (2 × 20 mL) and brine (2 × 20 mL). The organics were thenpassed through a hydrophobic frit and concentrated underreduced pressure to give a residue, which was purified by flashchromatography (silica gel) to afford the product.

The synthetic route of 886371-28-4 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Wilson, Kirsty L.; Murray, Jane; Sneddon, Helen F.; Jamieson, Craig; Watson, Allan J. B.; Synlett; vol. 29; 17; (2018); p. 2293 – 2297;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 1012084-53-5, 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. 1012084-53-5, name is 5-Bromo-2-fluoropyridin-3-ol, molecular formula is C5H3BrFNO, 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.

To a stirred suspension of 5-bromo-2-fluoropyridin-3-ol (7.77 g, 40.47 mmol) and potassium carbonate (8.39 g, 60.71 mmol) in acetonitrile (75 mL) was added iodoethane (6.63 g, 42.50 mmol). The resulting mixture was heated to reflux. After 16 h, the tanmixture was allowed to cool to room temperature and was diluted with water (250 mL). The mixture was extracted with diethyl ether (2 x 75 mL). The combined organic phases were dried over magnesium sulfate, filtered, and concentrated to provide 8.31 g (93%) of 5-bromo- 3-ethoxy-2-fluoropyridine as a tan solid.

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 1012084-53-5, 5-Bromo-2-fluoropyridin-3-ol.

Reference:
Patent; GENZYME CORPORATION; KANE, John, L., Jr.; BARBERIS, Claude; CZEKAJ, Mark; ERDMAN, Paul; GIESE, Barret; KOTHE, Michael; LE, Tieu-binh; LIU, Jinyu; MA, Liang; METZ, Markus; PATEL, Vinod; SCHOLTE, Andrew; SHUM, Patrick; WEI, Limli; (408 pag.)WO2017/15267; (2017); 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.623585-74-0, name is Methyl 2,5-dichloroisonicotinate, molecular formula is C7H5Cl2NO2, molecular weight is 206.03, as common compound, the synthetic route is as follows.category: pyridine-derivatives

Two solutions of methyl 2,5-dichloroisonicotinate (623585-74-0, 894 mg, 4.34 mmol) in THF (18 mL) and dimethylzinc (2M in toluene, 5.3 mL, 10.6 mmol) in toluene (12.7 mL) were pumped using a syringe pump through a column containing SyliCat DPP- Pd (800 mg, 0.26 mmol/g) at 80 C, 0.1 mL/min (each), Rt= 5 min. The outlet solution was collected onto water and the solvent evaporated in vacuo. The crude was diluted with water and extracted with DCM and washed with water (3x). The organic layer was separated, dried (MgS04), filtered and the solvents evaporated in vacuo to yield intermediate compound 1-107 (481 mg, 67%) as a colorless oil/solid.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,623585-74-0, Methyl 2,5-dichloroisonicotinate, and friends who are interested can also refer to it.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; ALONSO-DE DIEGO, Sergio-Alvar; VAN GOOL, Michiel, Luc, Maria; MARTIN-MARTIN, Maria, Luz; CONDE-CEIDE, Susana; ANDRES-GIL, Jose, Ignacio; DELGADO-GONZALEZ, Oscar; TRESADERN, Gary, John; TRABANCO-SUAREZ, Andres, Avelino; (211 pag.)WO2016/16395; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 1146970-26-4, 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. 1146970-26-4, name is 5-Chloro-2,3-dihydro-1H-pyrrolo[2,3-b]pyridine, molecular formula is C7H7ClN2, 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.

(6) The 5-chloro-7-azaindoline obtained in step (5), manganese dioxide was added to toluene, 5-chloro-7-azaindoline,Manganese dioxide, toluene weight ratio of 17:45:80, heated to 60 C and refluxed for 3 hours, cooled to room temperature after the product was filtered,The filter cake was washed three times with trichloromethane. The combined filtrates were evaporated to dryness and recrystallized from methyl acetate to give 5-chloro-7-azaindole.

According to the analysis of related databases, 1146970-26-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Ye Fang; (10 pag.)CN106279156; (2017); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 727356-19-6, 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.727356-19-6, name is 2-Bromo-6-(chloromethyl)pyridine, molecular formula is C6H5BrClN, molecular weight is 206.47, as common compound, the synthetic route is as follows.

Step 2; Preparation of 3-{1-[5-(6-bromopyridin-2-yl)-thiazol-2-yl]piperidin-4-yl}propionic acid methyl ester To an solution of 2-bromo-6-chloromethylpyridine (1.88 g, 0.12 mmol) obtained in Step 1 of Example 1 in ethanol (20 ml), 3-(1-thiocarbamoylpiperidin-4-yl)propionic acid methyl ester (2.10 g, 9.12 mmol) obtained in Step 1 was added and the mixture was heated at reflux overnight. The reaction solution was cooled to room temperature, dimethylformamide dimethylacetal (1.8 ml, 14 mmol) and triethylamine (3.8 ml, 27 mmol) were added, and heated at reflux for 1 hour. After the reaction solution was concentrated, water was added, and it was extracted with ethyl acetate and washed with a saturated brine. The organic layer was dried over magnesium sulfate and the residue obtained by vacuum concentration was purified by chromatography on silica gel (n-hexane:ethyl acetate=50:50 to 0:100) and the title compound (748 mg, 20%) was obtained. 1H-NMR (400 MHz, DMSO-d6) delta: 7.95 (1H, s), 7.80 (1H, dd, J=7.9, 0.7 Hz), 7.67 (1H, t, J=7.8 Hz), 7.36 (1H, dd, J=7.7, 0.7 Hz), 4.00-3.97 (2H, m), 3.61 (3H, s), 3.11-3.02 (2H, m), 2.37 (2H, t, J=7.4 Hz), 1.79-1.72 (2H, m), 1.57-1.49 (3H, m), 1.26-1.13 (2H, m).

The chemical industry reduces the impact on the environment during synthesis 727356-19-6, I believe this compound will play a more active role in future production and life.

Reference:
Patent; JAPAN TOBACCO INC.; US2006/205731; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1193-71-1, 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 1193-71-1, name is 4,6-Dimethylpyridin-3-amine. This compound has unique chemical properties. The synthetic route is as follows.

Intermediate 73: 4-{F(3,5-d imethyl-4-isoxazolyi)methyl]oxy}-N-(4,6-dimethyl-3-Ivridinvi)benzenesulfonamide4-{[(3,5-d imethyl-4-isoxazolyl)methyl]oxy}benzenesulfonyl chloride (247 mg, 0.819 mmol) was added to a solution of triethylamine (0.114 mL, 0.819 mmol) and 4,6-dimethyl-3-pyridinamine (100 mg, 0.819 mmol) in dichloromethane (1 mL). The mixture was heated at 70 0C for 2 hours. To themixture was added water (5 mL) then the organic layer separated and purified by silica (Si) chromatography (100 % ethyl acetate). The relevant fractions were combined and concentrated togive the title product (310 mg) as a yellow solid. LCMS (2 mm, formic) Rt 0.63 mins, m/z (ESj 388 (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 1193-71-1, 4,6-Dimethylpyridin-3-amine.

Reference:
Patent; GLAXO GROUP LIMITED; BIRAULT, Veronique; CAMPBELL, Amanda, Jennifer; HARRISON, Stephen; LE, Joelle; SHUKLA, Lena; WO2013/160419; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 38186-84-4 ,Some common heterocyclic compound, 38186-84-4, molecular formula is C6H5ClFN, 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.

5-Fluoro-3-methyl-2-pyridinamine (DIl): To a solution of 2-chloro-5-fluoro-3-methylpyridine DlO (0.50 g) in dry toluene (12.5 ml) were added sodium t-butoxyde (0.462 g, 4.81 mmol), Pd2(dba)3 (0.315 g, 0.344 mmol), BINAP (0.642 g, 1.031 mmol) and benzophenone imine (0.692 ml, 4.12 mmol). The resulting mixture was degassed (3 x pump/N2) and then heated to 80 0C. After 1 hour stirring, the mixture was cooled down to room temperature, diluted with Et2O (400 ml) and filtered through a celite pad. Volatiles were evaporated, the resulting oil was dissolved in THF (34 ml) and HCl (1.408 ml of a 2 M aqueous solution, 2.82 mmol) was added. The mixture was stirred at room temperature for 1.5 hours, then neutralized with a saturated NaHCO3 aqueous solution and diluted with DCM (200 ml). The inorganic layer was back- extracted with DCM (2 x 50 ml). The collected organic layers were dried (Na2SO4), filtered and evaporated. The residue was purified by flash chromatography on silica gel (Biotage SP4 12M column, Cy/EtOAc 60/40). Collected fractions gave the title compound DIl (0.20 g) as an orange solid. MS: (ES/+) m/z: 127 (M+l). C6H7FN2 requires 126. 1H NMR (400 MHz, DMSO-J6) delta ppm: 7.73 (d, 1 H), 7.23 (dd, 1 H), 5.60 (bs, 2 H), 2.04 (s, 3 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. 38186-84-4, 2-Chloro-5-fluoro-3-picoline, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; GLAXO GROUP LIMITED; ALVARO, Giuseppe; AMANTINI, David; WO2010/72722; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 90145-48-5 ,Some common heterocyclic compound, 90145-48-5, molecular formula is C6H5BrN2O, 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.

Example 2 tert-Butyl 2-(6-carbamoylpyridin-3-yl)-5-fluoro-lH-indole-l-carboxylatel-(t°t-Butoxycarbonyl)5-fiuoroindole-2-boronic acid (1 mmol), 5-bromopyridine-2- carboxamide (lmmol), Pd(dppf)Cl2 (0.05 mmol) and 2M Na2CO3 (aq.) (1.5 mL) solution were mixed in THF/water 5:1 (10 mL) in a 20 mL microwave vial. The reaction mixture was stirred at 1200C in the microwave reactor for 15 min. Water was added and the solution was extracted with EtOAc. The organic extracts were dried over Na2SO4, filtered and concentrated to afford a crude mixture which was purified by flash chromatography (Heptane/EtOAc gradient) to give the title compound (200 mg). 1H NMR delta ppm 8.75 (s, 1 H) 8.12 – 8.23 (m, 2 H) 8.07 – 8.13 (m, 2 H) 7.68 (br. s., 1 H) 7.48 (dd, 1 H) 7.15 – 7.32 (m, 1 H) 6.92 (s, 1 H) 1.30 (s, 9 H); MS m/z (M+H) 356.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,90145-48-5, its application will become more common.

Reference:
Patent; ASTRAZENECA AB; WO2008/108729; (2008); 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. 59105-50-9, name is (5-Bromopyridin-3-yl)(phenyl)methanone. A new synthetic method of this compound is introduced below., Computed Properties of C12H8BrNO

(1S,4S)-5-(5-Benzoyl-3-pyridyl)-2-(tert-butoxycarbonyl)-2,5-diazabicyclo[2.2.1]heptane In a sealed pressure tube under a nitrogen atmosphere, 3-benzoyl-5-bromopyridine (0.542 g, 2.1 mmol), (1S,4S)-N-(tert-butoxycarb- onyl)-2,5-diazabicyclo[2.2.1]heptane (0.475 g, 2.4 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.04 g, 0.04 mmol), rac-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (0.05 g, 0.08 mmol), sodium tert-butoxide (0.380 g, 3.8 mmol) and anhydrous toluene (20 mL) were stirred at 90 C. for 20 h. The reaction mixture was cooled to room temperature and diluted with water (200 mL) and then extracted with diethyl ether (100 mL). The diethyl ether extract was dried (MgSO4), filtered and concentrated by rotary evaporation. The residue was purified by flash chromatography on silica gel, using a gradient of 50% to 80% ethyl acetate:hexane as eluent, to yield 0.364 g (48%) of a yellow oil.

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, 59105-50-9, (5-Bromopyridin-3-yl)(phenyl)methanone.

Reference:
Patent; Targacept, Inc.; US6852721; (2005); B2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem