Day: July 27, 2021

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. 65-22-5, name is 3-Hydroxy-5-(hydroxymethyl)-2-methylisonicotinaldehyde hydrochloride, molecular formula is C8H10ClNO3, 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. Safety of 3-Hydroxy-5-(hydroxymethyl)-2-methylisonicotinaldehyde hydrochloride

To a solution of 0.25 mmol (0.036 g) triethylenetetramine in10 mL methanol, 0.5 mmol (0.1 g) of pyridoxal chloridrate and1.3 mmol (136 mL) triethylamine were added. The solution was heated in an oil-bath at 55 C and stirred by 15 min. Then a solution of 0.25 mmol (0.091 g) of Ni(ClO4)26H2O in 5 mL methanol was dropped to the main solution, which was stirred at 55 C by 1 h. The slow evaporation of the solvent afforded orange crystals after 4days. A similar one-pot synthesis was already reported [13].Yield: 65%. Melting point: 118e119 C. Anal. Calc: C22H34N6O6Ni:C, 49.19; H, 6.33; N,15.65. Found: C, 49.12, H, 6.39; N,15.44%. IR (KBrpellets, cm1): 3526 [m, n(OeH)alcohols]; 3302 [m, n(OeH)alcohol];2921 [w, n(CeH)sp3)]; 1637 [s, n(C]N)]; 1312 [m, n(OeH)alcohol]1263 [m, n(CeO)phenol.]; 1201[s, n(CleO)percholate]; 1012 [s,n(CeO)alcohols].

With the rapid development of chemical substances, we look forward to future research findings about 65-22-5.

Reference:
Article; Back, Davi Fernando; De Oliveira, Gelson Manzoni; Fontana, Liniquer Andre; Ramao, Brenda Fiorin; Roman, Daiane; Iglesias, Bernardo Almeida; Journal of Molecular Structure; vol. 1100; (2015); p. 264 – 271;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 115473-15-9, 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. 115473-15-9, name is 5,6,7,7a-Tetrahydrothieno[3,2-c]pyridin-2(4H)-one hydrochloride. A new synthetic method of this compound is introduced below.

Under nitrogen protection,A solution of 25.7 g (100 mmol) of 1-cyclopropyl-2-bromo-2- (2-fluorophenyl)2-oxo-2,4,5,6,7-7a-tetrahydrothieno [3,2-c] pyridine hydrochloride (28.7 g, 150 mmol)73 g (30 mmol) of cuprous iodide,Xphos 28.6 g (60 mmol), sodium carbonate 42.4 g (400 mmol) in 250 ml reaction flask, in 200 ml of 1,4-dioxane60 C for 3 hours. After the reaction, the mixture was cooled to room temperature, poured into ice water, extracted with methylene chloride, saturated sodium thiosulfateThe organic phase was concentrated and the mixture was recrystallized from dichloromethane and petroleum ether (1: 10) to give 5- (alpha-cyclopropylcarbonyl-2-fluorobenzyl)2-oxo-2,4,5,6,7,7a-tetrahydrothieno [3,2-c] pyridine in a yield of 90.2% and a purity of 99.37%.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,115473-15-9, 5,6,7,7a-Tetrahydrothieno[3,2-c]pyridin-2(4H)-one hydrochloride, and friends who are interested can also refer to it.

Reference:
Patent; Qingdao Chenda Biological Science & Technology Co., Ltd.; Chen, Linghao; (8 pag.)CN106117240; (2016); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 13091-23-1, 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 13091-23-1, name is 4-Chloro-3-nitropyridine. This compound has unique chemical properties. The synthetic route is as follows.

A solution of 4-chloro-3-nitropyridine (1.0 equiv.) and piperidine (2.0 equiv.) in ethanol, at a concentration of 0.5 M, was stirred at rt for 48 hours at which time the ethanol was removed in vacuo. The residue was partitioned between EtOAc (300 mL) and Na2CO3 (Sat) (75 mL), was washed further with H2O (50 mL), NaCl(Sat ) (50 mL), was dried over MgSO4, was filtered and the volatiles were removed in vacuo yielding 3- nitro-4-(piperidin-l-yl)pyridine (95%). LCMS (m/z): 207.7 (MH+); LC Rt = 1.60 min. 1H NMR (CDCl3): delta 8.80 (s, IH), 8.31 (d, J=5.7, IH), 6.84 (d, J=6.3, IH), 3.18-3.21 (m, 4H), 1.64-1.78 (m, 6H).

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 13091-23-1, 4-Chloro-3-nitropyridine.

Reference:
Patent; NOVARTIS AG; WO2009/109576; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 1609373-99-0, 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. 1609373-99-0, name is 2-Methyl-8-(pyridin-2-yl)benzofuro[2,3-b]pyridine, molecular formula is C17H12N2O, 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.

Intermediate I-3 (3.9 g, 5.2 mmol) and ligand L-2 (3.8 g, 15.6 mmol)Dissolved in DMF (100 mL) and 2-ethoxyethanol (100 mL)The mixture was heated at 130 C for 18 hours.After evaporating the solvent, the crude product contains 65-100%The hexane eluent of dichloromethane is purified by column.GD-003 (2.5 g, yield: 60%) was obtained.

According to the analysis of related databases, 1609373-99-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Zhejiang Huaxian Optoelectric Technology Co., Ltd.; Zheng Xianzhe; Wang Shichao; Hu Congcong; Wu Xinwei; Zhao Xiaoyu; (158 pag.)CN109810146; (2019); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 56026-36-9, 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. 56026-36-9, name is Methyl 6-(hydroxymethyl)nicotinate. A new synthetic method of this compound is introduced below.

To a methanol (16 mL)-acetic acid (20 mL) solution of methyl 6-hydroxymethylnicotinate (1.16 g, 6.94 mmol), 10% palladium/carbon (580 mg) was added. Then, the reaction solution was stirred for 12 hours at room temperature under a 4 atmospheres (0.4 MPa)-hydrogen atmosphere, the reaction solution was filtered with Celite. The solvents of the filtrate were removed under reduced pressure to give desired piperidine derivative. The product was used for the following reaction without further purification. In a 200 mL recovery flask, to an acetonitrile (46 mL) solution of the piperidine derivative obtained in the reaction described above, a 37% formalin aqueous solution (1.24 mL) and sodium triactoborohydride (3.97 g, 18.7 mmol) were added. The reaction mixture was stirred for 30 minutes at room temperature. After adding 20% potassium carbonate aqueous solution 20 mL, the product was extracted with chloroform/methanol solution (9/1, 50 mL) six times. The combined organic layer was dried with sodium sulfate, and the solvents were removed under reduced pressure. The residue was purified with aminosilica gel column chromatography (chloroform/methanol=9/1) to give crystalline methyl 6-hydroxymethyl-1-methypiperidine-3-carboxylate (1.02 g; total yield of two steps, 79%). (0449) LCMS (M+H=188)

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,56026-36-9, its application will become more common.

Reference:
Patent; SUMITOMO CHEMICAL COMPANY, LIMITED; SUMITOMO DAINIPPON PHARMA CO., LTD.; FUSANO, Akira; KOBAYASHI, Tomonori; SAITO, Yasuhiro; KANAI, Toshio; (55 pag.)US2016/221948; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 15862-31-4, 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.15862-31-4, name is 3-Bromo-5-nitropyridin-2-amine, molecular formula is C5H4BrN3O2, molecular weight is 218.01, as common compound, the synthetic route is as follows.

Compound 1 (2.6 g, 12.52 mmol) and iodo benzene (2.5 g,13.77 mmol )were dissolved in Toluene( 25 m) and the solution was degassed with argon. Palladium acetate (0.28 g, 6.26 mmol ) ,xanthaphos (0.545 g, 1.252 mmol) , sodium tertiary butaoxide(l .65 g, 18.78 mmol )were added. The reaction was heated at reflux under argon for 2h.The solvent was removed in vacuum and crude mass was purified by column chromatography by eluting with 20percent ethyl acetate in pet ether to get desired compound 2 ( 1 g )

Statistics shows that 15862-31-4 is playing an increasingly important role. we look forward to future research findings about 3-Bromo-5-nitropyridin-2-amine.

Reference:
Patent; VITAS PHARMA RESEARCH PRIVATE LIMITED; RANGARAJAN, Radha; KUMAR, Rajinder; PRABHAKAR, B V; CHANDRASEKHAR, P; MALLIKARJUNA, P; BANERJEE, Ankita; WO2013/42035; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 588729-99-1, 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.588729-99-1, name is 3-Amino-5-bromo-2-chloropyridine, molecular formula is C5H4BrClN2, molecular weight is 207.4557, as common compound, the synthetic route is as follows.

(1) 5-bromo-3-amino-2-chloropyridine (0.10 g, 0.48 mmol),Pyridine (0.057g, 0.72mmol) was dissolved in dichloromethane (0.77mL) to prepare reaction solution 1, and phenylsulfonyl chloride (0.10g, 0.58mmol) was used to prepare reaction solution 2. The flow rate (0.4mL / min) set by the intelligent numerical control sampler was simultaneously introduced into the first three-way mixer (ambient temperature 0 C) through a 500 mum inner diameter picker tube and mixed, and then flowed out under its own pressure and entered In a temperature-controlled (25 C) picker tube with an inner diameter of 500 mum, the sulfonamidation reaction is completed under the condition of a set residence time t1 (1min), and then the post-pressure valve is used to obtain a first effluent;

The chemical industry reduces the impact on the environment during synthesis 588729-99-1, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Fudan University; Zhuhai Fudan Chuangxin Institute; Ling Yun; Zhou Yaming; Jia Yu; Deng Mingli; Liu Xiaofeng; Yang Yongtai; Chen Zhenxia; (30 pag.)CN110498798; (2019); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 65515-28-8, 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.65515-28-8, name is Methyl 2,6-dichloronicotinate, molecular formula is C7H5Cl2NO2, molecular weight is 206.03, as common compound, the synthetic route is as follows.

step 1 (S ) -6-chloro-2- [1- (4-fluorophenyl) ethylamino] methyl nicotinatewas dissolved 2,6-dichloro-nicotinic acid methyl ester 5.0 g N, the N- dimethylformamide 50 ml, (S) – (-) – 1- (4-fluorophenyl) ethylamine 4.39 g, N, N-diisopropylethylamine 6.27g and 4-dimethylaminopyridine 150mg was added, and stirred for 24 hours at 60 C..The reaction mixture was cooled, diluted with ethyl acetate, washed successively with water and saturated brine, and dried over magnesium sulfate.Under reduced pressure, the solvent was distilled off, the resulting residue was purified by silica gel column chromatography to give the title compound 2.83g as a white powder.

Statistics shows that 65515-28-8 is playing an increasingly important role. we look forward to future research findings about Methyl 2,6-dichloronicotinate.

Reference:
Patent; NIPPON SHINYAKU COMPANY LIMITED; FUJIHARA, HIDETAKA; ASAKI, TETSUO; HORI, KATSUTOSHI; NAITO, HARUNA; (146 pag.)JP5668756; (2015); B2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 65515-28-8, Methyl 2,6-dichloronicotinate, 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, category: pyridine-derivatives, blongs to pyridine-derivatives compound. category: pyridine-derivatives

A 250 mL eggplant flask was sequentially charged with methyl 2,6-dichloronicotinate (4.12g, 20 mmol), [1,1?-biphenyl]-4-phenol (3.40 g, 20 mmol), and 24 mL of N, N-dimethylformamide for dissolving them. Triethylamine (3.8 mL,26 mmol) was added dropwise under stirring at room temperature, and after completion of the dropwise addition, triethylenediamine (336 mg, 3 mmol) was added. The mixture was stirred at room temperature for 4-5 hours and the solutionchanged from clear to turbid. Thin layer chromatography [V (petroleum ether) / V (ethyl acetate) = 6/1] detected thatmost of the raw material disappeared. Then, 1.30 mL of HOAc, 25 mL of isopropanol and 15 mL of ice water weresequentially added while the solution changed from turbid to clear, and stirred at room temperature for 0.5 hour. 40mLof water was slowly dropwise added, and after completion of the dropwise addition, stirred at room temperature for 2hours. A large number of white solid precipitated and was filtered. The filter cake was washed with a mixed solution ofisopropyl alcohol / water = 1: 1 and dried under vacuum at 50 C for 8 hours to obtain 5.66 g of methyl 6-([1,1?-biphenyl]-4-oxo)-2-chloronicotinate as a solid, 83.24%

The synthetic route of 65515-28-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Shenyang Sunshine Pharmaceutical Co., Ltd.; ZHOU, Yunlong; CAI, Suixiong; WANG, Guangfeng; JIAO, Lingling; MIN, Ping; JING, Yu; GUO, Ming; (44 pag.)EP3275881; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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 94220-45-8, name is 5-Chloro-1H-pyrazolo[4,3-b]pyridine. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C6H4ClN3

10786] To a suspension of sodium hydride (94 mg, 2.3 mmol, 60% in mineral oil) in DMF (4.0 mE) was added dropwise a solution of 5-chioro-1 H-pyrazolo[4,3-b]pyridine (0.30 g, 2.0 mmol, J&W Pharmlab) in DMF (1.0 mE). The mixture was stirred for 10 minutes, then benzyl bromide (0.244 mE, 2.05 mmol, Aldrich) was added. Afier 70 minutes, the mixture was quenched by the addition of water and the product was extracted with EtOAc. The combined extracts were washed with water, followed by brine, dried over sodium sulfate, filtered, and concentrated. Flash chromatography, eluting with a gradient from 0-20% EtOAc in hexanes afforded two isomeric products: Peak 1 (first to elute, 1-ben- zyl-5-chloro-1 H-pyrazolo[4,3-b]pyridine): 0.21 g, 44% yield. Peak 2 (second to elute, 2-benzyl-5-chloro-2H-pyra- zolo[4,3-b]pyridine): 0.10 g, 21% yield.Peak 1 (first to elute, 1-benzyl-5-chloro-1H-pyrazolo[4,3-b] pyridine): ?H NMR (500 MHz, CDC13) oe 8.19 (d, J=0.8 Hz, 1H), 7.56 (dd, J=8.8, 0.7 Hz, 1H), 7.38-7.27 (m, 3H), 7.22 (d,J=8.8 Hz, 1H), 7.18 (dd, J=7.7, 1.5 Hz, 2H), 5.59 (s, 2H);LCMS (M+H): 244.1, 246.1.Peak 2 (second to elute, 2-benzyl-5-chloro-2H-pyrazolo[4,3-b]pyridine): ?H NMR (500 MHz, CDC13) oe 8.07 (d, J=0.8 Hz,1H), 8.00 (dd, J=9.0, 0.8 Hz, 1H), 7.41-7.33 (m, 3H), 7.29(dd, J=7.6, 1.7 Hz, 2H), 7.19 (d, J=9.0 Hz, 1H), 5.60 (s, 2H);LCMS (M+H): 244.1, 246.1.

With the rapid development of chemical substances, we look forward to future research findings about 94220-45-8.

Reference:
Patent; Incyte Corporation; Rodgers, James D.; Shepard, Stacey; Wang, Haisheng; Shao, Lixin; US2015/175604; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem