Day: August 13, 2021

Related Products of 18614-51-2, 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 18614-51-2, name is 4-Amino-2-fluoropyridine. This compound has unique chemical properties. The synthetic route is as follows.

CuBr2 (0.1121 g, 0.501 mmol) was dissolved in 20 mL of 1-propanol and warmedfor 0.5 h to yield a dark brown mixture. 2-F-4AP (0.1141 g, 1.02 mmol) in 10 mL of 1-propanoland 1.2 mL of 48% HBr (aq) (8.84 M) was added to the CuBr2 solution. The dark brown, opaquesolution was left to evaporate at room temperature for three weeks. When the solutionreached 3 mL, the beaker was set in a desiccator. After six days, purple needles were recoveredby vacuum filtration, washed with cold 1-propanol and allowed to air dry to give 0.133 g(21.8%). IR (KBr) nu – 3387 m, 3302 m, 3203 m, 3089 m, 2964 m, 1663 s, 1604 m, 1523 m,1207 m, 1004 m, 831 w, and 738 m cm-1.

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 18614-51-2, 4-Amino-2-fluoropyridine.

Reference:
Article; Krasinski, Claire A.; Solomon, Benjamin L.; Awwadi, Firas F.; Landee, Christopher P.; Turnbull, Mark M.; Wikaira, Jan L.; Journal of Coordination Chemistry; vol. 70; 5; (2017); p. 914 – 935;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 913090-41-2, 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.913090-41-2, name is 6-(Difluoromethyl)pyridin-3-amine, molecular formula is C6H6F2N2, molecular weight is 144.1221, as common compound, the synthetic route is as follows.

A solution of the compound obtained in Step D (2.1 g) and JV-bromo- succinimide (2.56 g) in acetonitrile (50 ml) was stirred at 00C for 10 minutes. The reaction mixture was poured into water and extracted several times with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate and then concentrated in vacuo. Chromatography on silica gel (eluent: hexane / ethyl acetate 1 : 1) afforded 2-bromo-6- difluoromethyl-pyridin-3-yl-amine (2.5 g) as a solid. MS (ES+) 223 / 225 (MH+); IH NMR (400 MHz, CDCl3) 4.38 (br s, 2H), 6.52 (t, IH), 7.08 (d, IH), 7.41 (d, IH).

The chemical industry reduces the impact on the environment during synthesis 913090-41-2, I believe this compound will play a more active role in future production and life.

Reference:
Patent; SYNGENTA PARTICIPATIONS AG; PITTERNA, Thomas; CASSAYRE, Jerome Yves; CORSI, Camilla; MAIENFISCH, Peter; WO2010/9968; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 669070-64-8, 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 669070-64-8 as follows.

To the solution of (8) (0.15 g, 0.63 mmol, 1 equiv) in MeOH (1.1 mL), cooled at 0C, SOCI2 (0.07 mL, 0.98 mmol, 1.55 equiv) was slowly added. The reaction mixture was heated at 50C for 16h. After cooling to room temperature the water was added and the mixture was concentrated to 1h of its volume. The residue was adjusted to pH 6 withNaHCOssat, then extracted with EtOAc. The combined organic phases were dried over Mg504 and concentrated to give (9) (0.135 g, 85%) as a beige solid

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,669070-64-8, its application will become more common.

Reference:
Patent; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE; UNIVERSITE D’ORLEANS; AGROFOGLIO, Luigi; ROY, Vincent; PLEBANEK, Elzbieta; BESSIERES, Maxime; (105 pag.)WO2018/50771; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1187236-18-5, Adding some certain compound to certain chemical reactions, such as: 1187236-18-5, name is Ethyl 7-bromoimidazo[1,2-a]pyridine-2-carboxylate,molecular formula is C10H9BrN2O2, 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 1187236-18-5.

A mixture of 258-2 (300 mg, 1.12 mmol), B (356 mg, 1.23 mmol), Cul (21 mg, 0.11 mmol), K3PO4 (473 mg, 2.23 mmol), and picolinic acid (28 mg, 0.22 mmol) in DMSO (6 ml) is sparged with N2 for 5 min, and heated at 90 C overnight. The reaction mixture is cooled to ambient temperature, diluted with EtOAc and water, and filtered. The filtrate is washed with water and brine. The organic layer is dried, concentrated, and purified Si02 (0-6%, MeOH in DCM) to give 258-3

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. 1187236-18-5, Ethyl 7-bromoimidazo[1,2-a]pyridine-2-carboxylate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; ABEYWARDANE, Asitha; BRUNETTE, Steven Richard; BURKE, Michael Jason; KIRRANE, Thomas Martin, Jr.; MAN, Chuk Chui; MARSHALL, Daniel Richard; PADYANA, Anil Kumar; RAZAVI, Hossein; SIBLEY, Robert; SMITH KEENAN, Lana Louise; SNOW, Roger John; SORCEK, Ronald John; TAKAHASHI, Hidenori; TAYLOR, Steven John; TURNER, Michael Robert; YOUNG, Erick Richard Roush; ZHANG, Qiang; ZHANG, Yunlong; ZINDELL, Renee M.; WO2014/14874; (2014); 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. 82257-09-8, name is 3-Bromo-4-methoxypyridine, the common compound, a new synthetic route is introduced below. SDS of cas: 82257-09-8

To a stirred solution of tert-butyl 4-[(2-{[6-(4,4,5,5-tetramethyl-1 ,3,2-dioxaborolan-2-yl)-1 Hbenzimidazol-2-yl]amino}pyridin-4-yl)methyl]piperazine-1 -carboxylate (400 mg, 748 pmol) and 3-bromo-4-methoxypyridine (169 mg, 898 pmol) in dioxane (4 mL) and water (0.7 mL) wasadded sodium carbonate (238 mg, 2.25 mmol) and Pd(dppf)Cl2. CH2CI2 (91.7 mg, 112 pmol). The mixture was heated to reflux for 24 h. Further 3-bromo-4-methoxypyridine (70 mg) was added and the mixture was heated to reflux for 24 h. Dichioromethane was added, the mixture was dried (magnesium sulfate), filtered and the solvent was removed in vacuum. Silicagel chromatography gave 16.0 mg (4% yield) of the title compound as a crude product that wasused without further purification.LC-MS (Method 2): R = 1.20 mm; MS (ESIpos): m/z = 516 [M+H]1H-NMR (400 MHz, CHLOROFORM-d) oe [ppm]: 1.261 (0.74), 1.468 (16.00), 2.330 (1.89),3.394 (1.99), 3.444 (1.92), 3.927 (1.16), 6.927 (0.58), 6.941 (0.64), 6.953 (0.79), 6.965 (0.70),7.081 (1.09), 8.283 (0.78), 8.296 (0.74), 8.483 (0.57), 8.497 (0.56), 8.540 (1.04).

The synthetic route of 82257-09-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; SCHULZE, Volker; HEINRICH, Tobias; PRINZ, Florian; LEFRANC, Julien; SCHROeDER, Jens; MENGEL, Anne; BONE, Wilhelm; BALINT, Joszef; WENGNER, Antje; EIS, Knut; IRLBACHER, Horst; KOPPITZ, Marcus; BOeMER, Ulf; BADER, Benjamin; BRIEM, Hans; LIENAU, Philip; CHRIST, Clara; STOeCKIGT, Detlef; HILLIG, Roman; (1256 pag.)WO2017/102091; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 90902-83-3, Adding some certain compound to certain chemical reactions, such as: 90902-83-3, name is 3-Amino-2-bromo-5-chloropyridine,molecular formula is C5H4BrClN2, 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 90902-83-3.

Example 45: N-(2-Bromo-5-chloro-pyridin-3-yl)-4-tenVbutyl-N-methoxymethyl- benzenesulfonamide; [00436] A 200 mL round-bottom flask was charged with 2-bromo-5-chloro- pyridin-3-ylamine (10.4 g, 50.0 mmol), 4-tert-butyl-benzenesulfonyl chloride (20.0 g, 85.0 mmol), and pyridine (38 mL). The resultant solution was heated to 70 C and stirred overnight. The following day, the pyridine was removed by removed in vacuo and THF (30 mL) and 4.0 N NaOH (100 mL) were added and the reaction was stirred at 60 C overnight. The organics were subsequently removed in vacuo and the residues were diluted with water (400 mL). The small quantity of insoluble solid was removed by filtration and the pH was adjusted to 6-7 with concentrated HCI. The resultant aqueous solution was extracted with EtOAc, washed with brine, dried over MgSO4, and concentrated under reduced pressure to afford the diarylsulfonamide (13.4 g) in 66 % yield. To a solution of the crude sulfonamide (12.0 g, 35.0 mmol) and K2CO3 (24.0 g, 170 mmol) in anhydrous THF (80 mL) was added chloromethyl methyl ether (4.0 mL, 52.7 mmol). The resultant heterogeneous solution was stirred for 60 min at ambient temperature and the solids were subsequently removed via filtration. The filtrate was then removed in vacuo and the residue was dissolved in EtOAc. The organics were washed with saturated Na2CO3, dried over MgSO4, and evaporated in vacuo to generate a brownish oil. The oil was triturated with hexanes and the resultant solid filtered to produce the desired product as a light yellowish solid (11.5 g, 86% yield).

According to the analysis of related databases, 90902-83-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; CHEMOCENTRYX, INC.; WO2006/76644; (2006); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 54664-55-0, 4-Chloro-6,7-dihydro-5H-cyclopenta[b]pyridine, 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, HPLC of Formula: C8H8ClN, blongs to pyridine-derivatives compound. HPLC of Formula: C8H8ClN

Step 3 : 4-chloro-6,7-dihydro-5H-cvclopentarb1pyridine-l-oxide To a solution of 4-chloro-6,7- dihydro-5H-cyclopenta[b]pyridine (38 g, 247 mmol) and methyl trioxorhenium(VII) (400 mg, 1.61 mmol) in DCM (250 mL) was added hydrogen peroxide (76 mL, 742 mmol, 30%wt). After addition, the mixture was stirred at 20C for 48h. TLC showed SM was consumed. The mixture was diluted with DCM (300 mL) and water (150 mL), quenched with solid powder sodium sulfite portionwise until potassium iodide-starch test paper (the paper wetted by lmol/L aqueous HC1) did not turn blue. The organic phase was separated and the aqueous phase was extracted with CHCI3 (500 mL chi 3). The combined organic phases were dried over Na2S04, filtered and concentrated to give the title compound, which was used for the next step without further purification.

The synthetic route of 54664-55-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MERCK SHARP & DOHME CORP.; MERTZ, Eric; EDMONDSON, Scott, D.; SO, Sung-Sau; SUN, Wanying; LIU, Weiguo; NEELAMKAVIL, Santhosh, F.; GAO, Ying-Duo; HRUZA, Alan; ZANG, Yi; ALI, Amjad; MAL, Rudrajit; HE, Jiafang; KUANG, Rongze; WU, Heping; OGAWA, Anthony, K.; NOLTING, Andrew, F.; (152 pag.)WO2016/168098; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 1796-83-4, 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 1796-83-4, name is Dimethyl pyridine-3,4-dicarboxylate. This compound has unique chemical properties. The synthetic route is as follows.

Step A. Dimethyl pyridine-3,4-dicarboxylate 1 -oxideTo a stirred mixture of dimethyl pyridine-3,4-dicarboxylate (10.13 g, 51.9 mmol) and urea hydrogen peroxide (9.80 g, 104 mmol) in CH3CN (100 mL) at 0 0C was added dropwise trifluoroacetic anhydride (22.31 g, 106 mmol). The reaction mixture was stirred at 0 10 0C for 2 h, and then saturated aqueous sodium bisulfite (80 mL) was added slowly and the quenched mixture was diluted with 0.5 N HCl (300 mL) and extracted with CH2Cl2 (3 x 400 mL). The combined organic extracts were dried over Na2SO4, filtered, and concentrated in vacuo to give the title compound. MS: mlz = 212 (M + 1).

According to the analysis of related databases, 1796-83-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; MERCK & CO., INC.; WO2009/120652; (2009); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 97483-77-7 ,Some common heterocyclic compound, 97483-77-7, molecular formula is C6H3BrN2, 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.

Pyridine (40.0 mL, 4.0 v/w) was placed in a reactor, and zinc chloride (11.2 g, 81.9 mmol) was added dropwise at 40C or less. Thereafter, sodium azide (8.90 g, 137 mmol) and 5-bromo-2-cyanopyridine (10.0 g, 54.6 mmol) were added into the reactor, and the reaction mixture was stirred to reflux at 120C for 2 hr. After the termination of the reaction, the reaction product was cooled to room temperature, added with purified water (200 mL, 20.0 v/w), stirred at room temperature for 1 hr, filtered, and washed with purified water (200 mL, 20.0 v/w). The filtered solid was added with a 6 N hydrochloric acid aqueous solution (200 mL, 20.0 v/w) and then stirred at room tem[43jperature for 2 hr. The reaction product was filtered, washed with purified water (200mL, 20.0 v/w), and concentrated under reduced pressure, thus yielding a desired whitecompound. Yield (11.34 g, 91.8%), Purity 99.4%5-bromo-2-(2H-tetrazol-5-yl)pyridine:1H NMRoe (DMSO-d6, ppm) 8.95 (d,1H), 8.35 (dd,1H), 8.17 (d,1H)

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. 97483-77-7, 5-Bromopicolinonitrile, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ST PHARM CO., LTD.; WOO, Seok Hun; CHOI, YunHee; KIM, Hong Jun; CHANG, Sun Ki; LIM, Geun Jho; (14 pag.)WO2017/99530; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem