Category: pyridine-derivatives

Adding a certain compound to certain chemical reactions, such as: 918145-29-6, 3-Bromo-6-chloro-2,4-dimethylpyridine, 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, 918145-29-6, blongs to pyridine-derivatives compound. Safety of 3-Bromo-6-chloro-2,4-dimethylpyridine

Under N2, to a solution of 3-bromo-2,4-dimethyl-6-chloropyridine (4.40 g, 20.0 mmol) in anhydrous Et2O (80 mL), cooled at -78 0C, was added tert-BvLi (1.7 M in pentane, 14.0 mL, 24.0 mmol) slowly, forming a yellow suspension. After addition the mixture was stirred at that temperature for 15 min, and then anhydrous DMF (4.0 mL) was added. After the mixture was stirred at -78 0C for 30 min, it was brought to room temperature and stirred for another 1/2 h. Aqueous work-up and purification by flash chromatography on silica gel (EtOAc/hexanes, 1:4 in v/v) afforded 6-chloro-2,4-dimethylpyridine-3-carboxaldehyde as a pale yellow solid (2.00 g, 60%). 1H NMR (CDCl3) delta 2.60 (s, 3H), 2.81 (s, 3H), 7.11 (s, IH), 10.57 (s, IH).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,918145-29-6, its application will become more common.

Reference:
Patent; ANORMED INC.; WO2007/22371; (2007); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 183208-35-7, 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.183208-35-7, name is 5-Bromo-1H-pyrrolo[2,3-b]pyridine, molecular formula is C7H5BrN2, molecular weight is 197.03, as common compound, the synthetic route is as follows.

Example 4: Synthesis of 5-Pyridin-3-yl-lH-pyrrolo[2,3-b] pyridine 20 and related compounds.[0137] 5-Pyndin-3-yl-l H-pyrrolo[2,3-b]py?dine 20 was synthesized in one step from 5-bromo-lH- pyrrolo[2,3-b]pyridme 1 as described m Scheme 6Scheme 6Step 1 – Preparation of5-Pyndiotan-3-yl-LH-rhoyrrolo[2,3-b]pyndiotane (20)[0138] To 5-bromo-7-azaindole (1, 1 00 g, 5 08 mmol) m water (13 0 mL) and acetonitnle (36 mL) were added pyridine-3-boronic acid (19, 1 0 g, 8 1 mmol), potassium carbonate (1 79 g, 0 0130 mol) and Tetrakis(tnphenylphosphine)palladmm(0) (50 0 mg, 0 043 mmol) under an atmosphere of nitrogen The reaction mixture was heated to 170 0C overnight. The reaction mixture was poured into water and extracted with ethyl acetate The organic layer was washed with brine, dried over sodium sulfate, and concentrated The residue was purified with silica gel column chromatography elutmg with 25% ethyl acetate in hexane to provide a light yellow solid (20, 820 mg, 82%) 1

The chemical industry reduces the impact on the environment during synthesis 183208-35-7, I believe this compound will play a more active role in future production and life.

Reference:
Patent; PLEXXIKON, INC.; WO2008/80001; (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. 148639-07-0, name is 2-Chloro-3-fluoro-4-iodopyridine, molecular formula is C5H2ClFIN, 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: 148639-07-0

A mixture of 2-chloro-3-fluoro-4- iodopyridine (4.78 g, 18.6 mmol), 2-chloro-6-nitrobenzamide (3.91 g, 19.5 mmol), ethane- 1,2-diamine (0.2 mL, 2.97 mmol), copper(I) iodide (0.57 g, 2.97 mmol) and K3P04 (7.90 g, 37.2 mmol) in dioxane (80 mL), was degassed with a stream of argon and the reaction mixture was then heated under reflux for 4 hours. After cooling to room temperature, the crude reaction mixture was filtered through Celite washing with dioxane. The filtrate was concentrated to dryness under reduced pressure and the resultant residue was purified by column chromatography on silica gel eluting with 0-100% ethyl acetate in petroleum ether (40-60 C), to afford the title compound as a pale yellow solid (1.87 g, 31% yield). ¾ NMR (400 MHz, DMSO-i/6): delta 11.42-11.37 (br s, 1H), 8.35-8.24 (m, 3H), 8.08 (dd, J = 1.1, 8.1 Hz, 1H), 7.81 (t, J= 8.2 Hz, 1H).

With the rapid development of chemical substances, we look forward to future research findings about 148639-07-0.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; BLENCH, Toby; ELLWOOD, Charles; GOODACRE, Simon; LAI, Yingjie; LIANG, Jun; MACLEOD, Calum; MAGNUSON, Steven; TSUI, Vickie; WILLIAMS, Karen; ZHANG, Birong; WO2012/35039; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 6231-18-1, 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. 6231-18-1, name is 2,6-Dimethoxypyridine. A new synthetic method of this compound is introduced below.

General procedure: To a stirred cooled (0 C) solution of 2,2,6,6-tetramethylpiperidine (1.0 mL, 6.0 mmol) in THF (5 mL) were added BuLi (1.6 M hexanes solution, 6.0 mmol) and, 5 min later, FeBr2 (0.43 g, 2.0 mmol). The mixture was stirred for 15 min at 0 C before introduction of the substrate (2.0 mmol). After 2 h at room temperature, the electrophile (6.0 mmol) was added. The mixture was stirred for 1 h before addition of H2O (10 mL) and extraction with EtOAc (3×20 mL). The combined organic layers were dried over MgSO4, filtered, and concentrated under reduced pressure.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,6231-18-1, 2,6-Dimethoxypyridine, and friends who are interested can also refer to it.

Reference:
Article; Nagaradja, Elisabeth; Chevallier, Floris; Roisnel, Thierry; Jouikov, Viatcheslav; Mongin, Florence; Tetrahedron; vol. 68; 14; (2012); p. 3063 – 3073;,
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. 109-09-1, name is 2-Chloropyridine. A new synthetic method of this compound is introduced below., name: 2-Chloropyridine

General procedure: 2-Chloropyridines were dissolved in EtOH and hydrazine hydrate added. The solution was heated in a thick walled sealed vial for 72h at 55 C, concentrated under a stream of nitrogen and purified by silica gel chromatography, (hexanes/ethylacetate).

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, 109-09-1, 2-Chloropyridine.

Reference:
Article; Finlay, Heather J.; Jiang, Ji; Caringal, Yolanda; Kover, Alexander; Conder, Mary Lee; Xing, Dezhi; Levesque, Paul; Harper, Timothy; Hsueh, Mei Mann; Atwal, Karnail; Blanar, Michael; Wexler, Ruth; Lloyd, John; Bioorganic and Medicinal Chemistry Letters; vol. 23; 6; (2013); p. 1743 – 1747;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 934266-82-7, 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 934266-82-7, name is 5-Bromothiazolo[5,4-b]pyridin-2-amine. This compound has unique chemical properties. The synthetic route is as follows.

Step B: 4-acetylbenzoyl chloride (3B, 560 mg, 1.0 equivalent) was dissolved in DMA (0.15 M). Methyl 4-(chlorocarbonyl)benzoate (2.0 equivalent) was then added. The mixture was heated to 50 C. for 12 h, followed by addition of water and extraction with EtOAc twice. The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo. The crude product was purified by chromatography (SiO2, gradient of 5 to 20% EtOAc/Hex) to give 3C (16%) as a tan solid: 1H NMR (400 MHz, DMSO-d6) delta ppm 2.66 (s, 3 H) 7.73 (d, J=8.59 Hz, 1H) 8.08-8.17 (m, 3H) 8.25 (d, J=8.84 Hz, 2H) 13.36 (br. s., 1H); ESI-MS: m/z 376.0 (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 934266-82-7, 5-Bromothiazolo[5,4-b]pyridin-2-amine.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; US2009/318425; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 138-60-3, 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.138-60-3, name is 4-Oxo-1,4-dihydropyridine-2,6-dicarboxylic acid, molecular formula is C7H5NO5, molecular weight is 183.1183, as common compound, the synthetic route is as follows.

4-hydroxypyridine-2,6-dicarboxylic acid monohydrate(5.0 g, 27.3 mmol) and o-phenylenediamine (6.49 g,58.7 mmol) were suspended in phosphoric acid (85%,55 mL). The mixture was kept at around 200 C for 6 hwith vigorous stirring. After cooling to room temperature,the mixture was poured into ice-water (300 mL), and thewhite color precipitate was filtered off and added to hot 10%aqueous Na2CO3solution (350 mL). The resulting light bluesolid was filtered off and added to hot methanol saturatedwith Na2CO3.The suspending solution was filtered off anddiluted with water (100 mL) and acidified with 15% hydrochloricacid to pH 1. The white precipitate was filtered offand extracted several times with boiling methanol. The collectedextracts were evaporated until precipitation began.The color-less product was filtered and dried under vacuum;yield: 4.0 g (48%); light-yellow color solid.

The chemical industry reduces the impact on the environment during synthesis 138-60-3, I believe this compound will play a more active role in future production and life.

Reference:
Article; Tsutsumi, Mayu; Kobayashi, Fumiya; Ohtani, Ryo; Nakamura, Msaaki; Hayami, Shinya; Journal of Inclusion Phenomena and Macrocyclic Chemistry; vol. 94; 3-4; (2019); p. 183 – 188;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 89937-77-9, Adding some certain compound to certain chemical reactions, such as: 89937-77-9, name is Methyl 1,2-dihydro-2-oxopyridine-4-carboxylate,molecular formula is C7H7NO3, 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 89937-77-9.

To a mixture of crude IS (2 g, 13.1 mmol), phenylboronic acid (1.93 g, 15.7 mmol), TEA (2.64 g, 26.1 mmol), Py (2.07 g, 26.1 mmol) in DCM (20 mL) is added Cu(OAc)2 (3.56 g, 19.6 mmol). After reacting at room temperature overnight under oxygen, the mixture is filtered, concentrated, and purify by silica gel column chromatography (MeOH:DCM = 1 :50) to give 16 as a yellow solid (2.3 g, 77% yield), (MS: | VI · H | 230.1)

According to the analysis of related databases, 89937-77-9, the application of this compound in the production field has become more and more popular.

Reference:
Patent; IMMUNE SENSOR, LLC; THE BOARD OF REGENTS OF THE UNIVERSITY OF TEXAS SYSTEM; ZHONG, Boyu; SUN, Lijun; SHI, Heping; LI, Jing; CHEN, Chuo; CHEN, Zhijian; (270 pag.)WO2017/176812; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 14667-47-1 ,Some common heterocyclic compound, 14667-47-1, molecular formula is C7H8N2O2, 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.

General procedure: To a solution of methyl 2-amino-4-chlorobenzoate (300 mg, 1.6 mmol) and ethyl 2-phenoxyacetate (320 mg, 1.8 mmol) in anhydrous THF (9 mL) was added KHMDS (4.8 mL, 1.0 M in THF, 4.8 mmol) in one portion with vigorous stirring under a nitrogen atmosphere. The reaction mixture was stirred at rt until completion of the reaction (10 min) then MeOH was added. The reaction mixture was concentrated under reduced pressure and the resulting residue was taken up in water and acidified with 1 N HCl until precipitation occurred. The precipitate was filtered, washed with EtOH then dried to give 7-chloro-4-hydroxy-3-phenoxyquinolin-2(1H)-one (Table 2, entry 1) as a pale pink powder (449 mg, 92%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,14667-47-1, its application will become more common.

Reference:
Article; Toum, Jerome; Moquette, Alexandre; Lamotte, Yann; Mirguet, Olivier; Tetrahedron Letters; vol. 53; 15; (2012); p. 1920 – 1923;,
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. 55717-45-8, name is 6-Bromopyridin-3-ol, the common compound, a new synthetic route is introduced below. Application In Synthesis of 6-Bromopyridin-3-ol

[000570] Synthesis [000571] A mixture of 2 (579 mg, 3.46 mmol), 1 (500 mg, 2.89 mmol) and K2C03 (1.2 mg, 8.7 mmol) in 5 mL of DMF was stirred at 60 C for 16 hours. The reaction mixture was diluted with water (50 mL) and extracted with ethyl acetate (40 mL x 3). The combined organic phases were washed with water (50 mL), brine (50 mL), dried over anhydrous Na2SC>4 and filtered. The filtration was concentrated in vacuo, and the residue was purified by silica gel chromatography (ethyl acetate: petroleum ether = 10: 1) to give 3 as white solid (650 mg, yield: 85.5%). LC-MS m/z: 266.0 [M+H]+. LC-MS Purity (254 nm): > 81%; tR= 1.964 min.

The synthetic route of 55717-45-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; DANA-FARBER CANCER INSTITUTE, INC.; BRADNER, James; ERB, Michael; QI, Jun; (96 pag.)WO2016/196879; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem