Month: April 2022

Related Products of 3430-26-0, 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. 3430-26-0, name is 2,5-Dibromo-4-methylpyridine, molecular formula is C6H5Br2N, 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.

5-bromo-4-methyl-pyridine-2-carbonitrile:To a solution of 2,5-dibromo-4-methylpyridine (15 g, 59.8 mmol, Eq: 1.00) in DMF (100 ml) was added copper(1) cyanide (4.28 g, 47.8 mmol, Eq: 0.8) and sodium cyanide (2.34 g, 47.8 mmol, Eq: 0.8). The reaction mixture was refluxed for 20 hr at which point a precipitate formed. Upon cooling water was added and the mixture sonicated. The solids were filtered and washed with water. The resulting filtrate was extracted with EtOAc and the organic layers then combined, washed with water and brine, and concentrated under reduced pressure. The crude material was then purified by column chromatography (0-10% EtOAc/Hex gradient) to give 5-bromo-4-methyl-pyridine-2-carbonitrile (5 g, 42.4% yield) as a white solid.

According to the analysis of related databases, 3430-26-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Hoffmann-La Roche Inc; Bhagirath, Niala; Brameld, Kenneth Albert; Kennedy-Smith, Joshua; US2013/90334; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 582303-10-4 ,Some common heterocyclic compound, 582303-10-4, molecular formula is C8H11NO, 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.

A solution of this alcohol compound (32.2 g, 235 mmol) in 144 ml toluene and 120 ml CHCl3 was added dropwise to a solution of SOCl2 (18.8 ml, 259 mmol) in 24 ml toluene, all the while maintaining the internal temperature between 23 and 35. After the end of the addition the reaction mixture was vigorously stirred at 35 for 1.5 h and water pump vacuum was applied until the solvent was completely evaporated. The brown precipitate was resuspended in toluene, rapidly filtered off and washed three times with toluene. Drying in the desiccator (aspirator vacuum) gave 33.8 g (176 mmol, 75%) of 5-(chloromethyl)-2,6-dimethylpyridine hydrochloride as a light brown solid.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,582303-10-4, its application will become more common.

Reference:
Patent; Phan, Hieu Trung; Nguyen, Lan Mong; Azoulay, Raymond; Diep, Vinh Van; Eschenhof, Harald; Niesor, Eric Joseph; Bentzen, Craig Leigh; Ife, Robert John; US2005/124586; (2005); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 25194-01-8, 2,6-Dichloro-4-nitropyridine, 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, Product Details of 25194-01-8, blongs to pyridine-derivatives compound. Product Details of 25194-01-8

REFERENCE SYNTHESIS EXAMPLE 1 Synthesis of 2,6-dichloro-4-methoxypyridine used in the Synthesis example 6 To a tetrahydrofuran solution containing methanol (0.37 g, 0.0104*1.1 mol), sodium hydride (0.44 g, (ca.60% in mineral oil), 0.0104*1.05 mol) was added. Then 2,6-dichloro-4-nitropyridine (2.00 g, 0.0104 mol) was added thereto and the mixture was stirred for about 2 hours at room temperature. After it was confirmed that there was no bubbling with the addition of methanol (0.5 g), the mixture was stirred for about 1 hour. The reaction solution was partitioned between ethyl acetate and water. The obtained organic layer was washed successively with aqueous saturated sodium hydrogen carbonate and aqueous saturated sodium chloride, then dried over anhydrous sodium sulfate and concentrated to obtain the end product which was almost pure. Yield: 1.63 g (88%). Solid. Melting point: 94-96 C. 1 H-NMR (60 MHz, CDCl3, delta): 3.79(3H,s), 6.70(2H,s).

The synthetic route of 25194-01-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Kureha Kagaku Kogyo Kabushiki Kaisha; US5624942; (1997); A;,
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.52559-11-2, name is Pyridine-2,3,4-triamine, molecular formula is C5H8N4, molecular weight is 124.14, as common compound, the synthetic route is as follows.Safety of Pyridine-2,3,4-triamine

Dissolve 2,3, 4-triaminopyridine (2.5 mmol) in water (20 mL). Add NAHCO3 (0.63 g, 7.5 mmol), dioxane (10 ML), AND 2-BROMO-1-(3-TRIRLUOROMETHYL-PYRIDIN-2-YL)-ETHANONE hydrobromide (0.5 g) and stir at 100C for 2 hours. Cool the mixture and extract with EtOAc (4 X 10 mL). Wash the combined organic extracts with brine and dry over NA2S04. Purify the residue by preparative HPLC to give the title compound.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,52559-11-2, Pyridine-2,3,4-triamine, and friends who are interested can also refer to it.

Reference:
Patent; NEUROGEN CORPORATION; WO2005/7652; (2005); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 116308-35-1, 2-(Trifluoromethyl)nicotinaldehyde, 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, 116308-35-1, blongs to pyridine-derivatives compound. COA of Formula: C7H4F3NO

General procedure: The appropriate substituted pyridine aldehyde (10 mmol) was dissolved in ethanol (20 mL) and sodium metabisulfite (15 mmol) in 5 mL water was added in portion over 5 minutes. The reaction mixture was stirred at room temperature for 1 h, and subsequently stirred at 4C overnight and the formed precipitate was filtered and dried to get sodium bisulfite adducts.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,116308-35-1, its application will become more common.

Reference:
Article; Ali, Mohamed Ashraf; Osman, Hasnah; Kumar, Raju Suresh; Almansour, Abdulrahman I.; Arumugam, Natarajan; Masand, Vijay H.; Panneerselvam, Theivendren; Letters in drug design and discovery; vol. 13; 7; (2016); p. 691 – 696;,
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. 69045-83-6, name is 2,3-Dichloro-5-(trichloromethyl)pyridine. A new synthetic method of this compound is introduced below., Recommanded Product: 2,3-Dichloro-5-(trichloromethyl)pyridine

26.5 g 0.1 mol 2,3-dichloro-5-trichloromethylpyridine,0.2 g of tungsten hexachlor into the reactor,Heated to 170 C at atmospheric pressure,And then hydrogen fluoride (about 20 g)The reaction is terminated when the test product is no longer changed,Unreacted hydrogen fluoride,After condensing recovery,The generated hydrogen chloride can be absorbed and removed.The reaction solution was cooled to room temperature,Transferred to an autoclave,Heated to 180 C,Pressure 0.2MPa,Reaction 5h,Cooling down,Sampling analysis,Containing 2,3-dichloro-5-trifluoromethylpyridine 94%Yield 92%.

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, 69045-83-6, 2,3-Dichloro-5-(trichloromethyl)pyridine.

Reference:
Patent; Nanjing Red Sun Biochemistry Co., Ltd.; Wang, Wenkui; Luo, Chaoran; Chen, Xinchun; Jiang, Jianhua; Zhong, Jinsong; (5 pag.)CN106397309; (2017); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 824-52-2, 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.824-52-2, name is 5-Methyl-1H-pyrrolo[2,3-b]pyridine, molecular formula is C8H8N2, molecular weight is 132.16, as common compound, the synthetic route is as follows.

Reference Example 2041,3-dimethyl-5-(5-methyl-1H-pyrrolo[2,3-b]pyridin-1-yl)-1H-pyrazole-4-carbaldehydeTo a solution of 5-methyl-1H-pyrrolo[2,3-b]pyridine (1.70 g) in N,N-dimethylformamide (30 mL), which was cooled at 0 C. in an ice bath, was added 60% sodium hydride (in oil, 561 mg) with stirring, and the mixture was stirred at 0 C. for 30 min. 5-Chloro-1,3-dimethyl-1H-pyrazole-4-carbaldehyde (1.85 g) was added to this reaction mixture at 0 C., and the reaction mixture was stirred at 80 C. for 6 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and filtrated. The filtrate was concentrated, and the residue was subjected to silica gel column chromatography (hexane-ethyl acetate 70:30, v/v), and crystallized from hexane-ethyl acetate to give the title compound (1.42 g, yield 48%) as colorless crystals.1H-NMR (300 MHz, CDCl3) delta:2.46 (s, 3H), 2.54 (s, 3H), 3.68 (s, 3H), 6.69 (d, J=3.6 Hz, 1H), 7.25-7.29 (m, 1H), 7.80-7.83 (m, 1H), 8.19 (d, J=2.1 Hz, 1H), 9.57 (s, 1H).

The chemical industry reduces the impact on the environment during synthesis 824-52-2, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Tawaraishi, Taisuke; Imoto, Hiroshi; Cho, Nobuo; US2008/194617; (2008); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 824-51-1, 6-Methyl-1H-pyrrolo[2,3-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, 824-51-1, blongs to pyridine-derivatives compound. Recommanded Product: 6-Methyl-1H-pyrrolo[2,3-b]pyridine

A mixture of 5-bromoJ-inethyI-2-((2(trimethylsiiyi)ethoxy)methyi)-2H4ndazole(Intennectiate 13, 0.25 rnL, 0.76 rnmoi), 6-methyF-1Hpyrrolo2,3-b]pyridine (100mg, 076 rnrnoi), IPd(ll) cinnamy1)Cl]2 (24 mg, 0.045 mmol), BippyPhos (47 mg, 0091 mmol), and sodium tertbutoxide (105 mg, 1 06 mmoi) in I ,4-dioxane (5 mL) was heated in a microwave reactor at 180 C for 2.0 minutes. The reaction mixture was diluted with 1-120 and extracted with EtOAc (5 mL x 3). The organic layer was dried (Na2SO4) and concentrated in vaeuo. Purification FCC, Si02, 0:100 to20:80. EtOAc:Hex) afforded the title compound (251 rng, 85%). MS (ESI): mass calcd. for C22H28NOSi, 392.2; mz found, 393.2 [M+Hi.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,824-51-1, its application will become more common.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; BERRY, Cynthia G.B.; CHEN, Gang; JOURDAN, Fabrice Loic; LEBOLD, Terry Patrick; LIN, David Wei; PENA PINON, Miguel Angel; RAVULA, Suchitra; SAVALL, Bradley M.; SWANSON, Devin M.; WU, Dongpei; ZHANG, Wei; AMERIKS, Michael K.; (407 pag.)WO2016/176460; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 934279-60-4, 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. 934279-60-4, name is 2-Chloro-5-(trifluoromethyl)nicotinaldehyde. A new synthetic method of this compound is introduced below.

To a stirred solution of 427 2-chloro-5-(trifluoromethyl)nicotinaldehyde (780 mg, 3.72 mmol) in 139 MeOH (5 mL) was added 100 NaBH4 (141 mg, 3.72 mmol) at 0 C. and the reaction was stirred at 0 C. for 1 h. The reaction mixture was quenched with sat. 101 NH4Cl (5 mL), then extracted with EtOAc (5 mL×2). The organic layers were collected, washed with brine, dried over Na2SO4, filtered, and the filtrate was concentrated in vacuo. The residue was purified by flash silica gel chromatography to give the 429 title compound as an oil. MS (ESI) m/z: 212.0 [M+H+].

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,934279-60-4, its application will become more common.

Reference:
Patent; Merck Sharp & Dohme Corp.; Han, Yongxin; Achab, Abdelghani; Deng, Yongqi; Fradera, Xavier; Gibeau, Craig; Hopkins, Brett A.; Li, Derun; Liu, Kun; McGowan, Meredeth A.; Sciammetta, Nunzio; Sloman, David; White, Catherine; Zhang, Hongjun; Zhou, Hua; US2019/144433; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 59020-10-9, 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. 59020-10-9, name is 3-(Tributylstannyl)pyridine, molecular formula is C17H31NSn, 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.

34a. 5-(3-Pyridinyl)-6-chloro-3-(1-BOC-2-(S)-pyrrolidinylmethoxy)pyridine To a solution of 5-bromo-6-chloro-3-(1-BOC-2-(S)-pyrrolidinylmethoxy)pyridine (from Example 23a, 500 mg, 1.28 mmol) in toluene (10.0 mL) was added 3-pyridinyltributyltin (564 mg, 1.5 mmol) and tetrakis(triphenylphosphine)palladium(0) (45 mg, 0.039 mmol). After being refluxed overnight, the resulting mixture was cooled to room temperature. Solvent was removed and the residue was chromatographed on a silica gel column, eluding with hexane/EtOAc 2:1 and 1:1 to afford an oil (428 mg, 86%). MS (CI/NH3) m/z 390 (M+H)+. 1 H NMR (CDCl3, 300 MHz) delta1.24-1.67 (m, 2H), 1.44 (s, 9H), 1.86-2.10 (m, 2H), 3.32-3.45 (m, 2H), 3.95-4.27 (m, 3H), 7.28-7.44 (m, 2H), 7.81-7.86 (m, 1H), 8.14-8.17 (m, 1H), 8.65-8.73 (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 59020-10-9, 3-(Tributylstannyl)pyridine.

Reference:
Patent; Abbott Laboratories; US5629325; (1997); A;; ; Patent; Abbott Laboratories; US6127386; (2000); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem