Day: June 23, 2021

Synthetic Route of 73998-95-5, 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 73998-95-5 as follows.

A solution of oxalyl chloride (2.32 mL, 26.963 mmol) in DCM (30 mL) was cooled down to -78 C. To this solution was added DMSO (3.83 mL, 53.922 mmol) dropwise under nitrogen atmosphere. The reaction mixture was stirred at the same temperature for another 30 min. To this reaction mixture was added a solution of (4,6-dichloro-3- pyridyl)methanol (1.6 g, 8.987 mmol) in DCM (10 mL), and then the reaction mixture was stirred for 30 min. Then, to this stirred reaction mixture was added triethylamine (11.2 mL, 80.883 mmol). The reaction mixture was stirred at the same temperature for another 30 min. The progress of reaction was monitored by TLC. After completion of reaction, the mixture was quenched with saturated sodium bicarbonate solution (30 mL). The product was extracted using DCM (2×50 mL). The combined organic layer was again washed with water (3×30 mL) and finally with brine solution (30 mL). The organic layer was separated, dried over anhydrous sodium sulfate and concentrated under reduced pressure to afford 4,6-dichloropyridine-3-carbaldehyde (1.53 g) as a light yellow solid

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,73998-95-5, its application will become more common.

Reference:
Patent; MEDIVATION TECHNOLOGIES, INC.; RAI, Roopa; CHAKRAVARTY, Sarvajit; PUJALA, Brahmam; SHINDE, Bharat Uttam; NAYAK, Anjan Kumar; CHAKLAN, Naveen; AGARWAL, Anil Kumar; RAMACHANDRAN, Sreekanth A.; PHAM, Son; WO2015/103355; (2015); 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. 848498-98-6, name is 2,6-Dichloro-N-methoxy-N-methylisonicotinamide, the common compound, a new synthetic route is introduced below. Product Details of 848498-98-6

A mixture of 88-1 (20.0 g, 85.1 mmol), boronic acid (13.1 g, 93.6 mmol), Pd(dppf)Cl2 (3.1 g, 4.25 mmol) and TBAF (1 M, 127.6 mL) in DCM (400 mL) was stirred at 25 C. for 12 h under N2. The solution was concentrated, and the residue was diluted with H2O (1 L) and extracted with EA (800 mL). The organic phase was washed with brine, dried with anhydrous Na2SO4, filtered and concentrated. The residue was purified by column chromatography using 520% EA in PE as eluent to give 88-2 (17.2 g, 68.6%) as a yellow oil. MS: m/z 295.7 [M+H]+.

The synthetic route of 848498-98-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Alios BioPharma, Inc.; Wang, Guangyi; Beigelman, Leonid; Truong, Anh; Stein, Karin Ann; (234 pag.)US2016/244460; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 14529-54-5, 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. 14529-54-5, name is 3,5-Dibromo-1-methylpyridin-2(1H)-one, molecular formula is C6H5Br2NO, 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.

Example 335a 5-Bromo-3-(6,6-dimethyl-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazin-2-ylamino)-1-methylpyridin-2(1H)-one 335a A 100-mL round-bottomed flask equipped with a reflux condenser was charged with 1,4-dioxane (10 mL), 6,6-dimethyl-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazin-2-amine 330g (167 mg, 1.0 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one (320 mg, 1.2 mmol), Pd2(dba)3 (91 mg, 0.10 mmol), XantPhos (116 mg, 0.20 mmol), and cesium carbonate (652 mg, 2.0 mmol). After three cycles of vacuum/argon flush, the mixture was heated at 100 C for 3 h. It was then filtered and the filtrate was evaporated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 100:1 dichloromethane/methanol to afford 335a (210 mg, 60%) as a yellow solid. MS-ESI: [M+H]+ 352.9

According to the analysis of related databases, 14529-54-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; F.Hoffmann-La Roche AG; CRAWFORD, James John; ORTWINE, Daniel Fred; WEI, BinQing; YOUNG, Wendy B.; EP2773638; (2015); B1;,
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. 39856-50-3, name is 5-Bromo-2-nitropyridine, the common compound, a new synthetic route is introduced below. Product Details of 39856-50-3

Method- 1Piperazine (85 g) and 5-Bromo-2-nitropyridine (100 g) were added in DMF and cooled to 50-60C, followed by addition of 2-propanol (1000 ml) and stirred for 1 hr. The reaction mixture was further cooled to 20-30C and stirred for 2-3 hrs. The reaction mass was filtered under vacuum and washed with 2-propanol. The resulting solid was treated with Boc anhydride (161 g) in the presence of diisopropyl ethyl amine (95 g) in dichloromethane (500 ml) at ambient temperature. Product was isolated by addition of n-heptane (1200 mL) followed by filtration and washing with n-heptane and dried under vacuum at 50-60C to give pale yellow solid (130 g).Yield: 85.0 %; HPLC Purity: 99.0%

The synthetic route of 39856-50-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; FRESENIUS KABI ONCOLOGY LTD.; SOKHI, Sarbjot Singh; SINGH, Govind; LAHIRI, Saswata; PANDEY, Maneesh Kumar; TIWARI, Raj Narayan; SHUKLA, Sonu; MUSMADE, Sachin; DUA, Heena; CABRI, Walter; (70 pag.)WO2019/82143; (2019); 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. 77168-63-9, name is 4-(Pyridin-4-yl)thiazole-2-thiol. A new synthetic method of this compound is introduced below., Product Details of 77168-63-9

A reactor was charged with 143.3 g of 4-(4-Pyridyl)-1,3-thiazole-2-thiol, 570 ml of tetrahydrofuran, 145 ml of methanol. The obtained mixture was thermo-regulated to 20-25°C, and at this temperature 126.3 g of sodium methylate solution 30percent in methanol were carefully added. The obtained mixture was left under stirring until complete dissolution then cooled to -2-0°C and maintained at that temperature. In a different reactor a solution of 450 g of benzhydryl (6R,7R)-7f3-[(phenylacetyl)amino]-3- [(methylsulfonyl)oxy]-3-cephem-4-carboxylate in 1.3 1 of tetrahydrofuran was prepared, which was cooled to -5-0°C. The 4-(4-pyridyl)-1,3-thiazole-2-thiol sodium salt solution was then added to the substrate solution, by maintaining the temperature at -5-0°C. At the end of the addition thetemperature was set to -2-0°C and the mixture was maintained under stirring for about 2 h. The mixture was then diluted with 2.5 1 of ethyl acetate and washed three times with brine. The aqueous phases were eliminated and the organic phase was treated with decolorizing charcoal and concentrated under reduced pressure to about half volume and diluted with 1.5 1 of toluene two times, then concentrated again under vacuum to about half volume and diluted with 700 mlof toluene. The mixture was stirred at 25-30°C for 30±5 minutes, then cooled to 0-5°C and maintained at this temperature for 60 about 1 h. The mixture was filtered, the cake washed with toluene and dried overnight under vacuum at about 40°C yielding 455 g of crystalline toluene hemi-solvate of benzhydryl (6R,7R)-7f3 -[(phenylacetyl)amino] -3- [4-pyridyl-2-thiazolylthio] -3- cephem-4-carboxylate. MW: 1545.92 (Toluene solvated form)Yield: 82percentDSC: 104-106 °C (melting endotherm)TGA: weight loss of about 4.54percent,1H NMR: (D6-DMSO) oe 2.29, 3.54, 3.68, 3.93, 5.30, 5.87, 6.98, 7.16-7.38, 7.89, 8.54, 8.60 and9.28 ppm13C NMR: (D6-DMSO) oe20.99, 29.34, 40.13, 41.56, 58.41, 59.59, 79.24, 118.47, 120.20, 121.55,125.26, 126.47-140.12, 150.36, 125.86, 160.41, 161.23, 164.77, 170.92 ppm;IR spectrum (KBr): 3280 (NH), 3034 (CH-aromatic), 2960,(CH-aliphatic), 1791 (f3-LactumC=O), 1702 (Ester C=O), 1654 (Amide C=O), 1535 (Pyridine C=N) and 1011 (C-O), cm-iMass spectrum: mlz = [M+j = 677.13 (Non-solvated form).

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, 77168-63-9, 4-(Pyridin-4-yl)thiazole-2-thiol.

Reference:
Patent; FRESENIUS KABI ANTI-INFECTIVES SRL; RICCI, Antonio; ZANON, Jacopo; (42 pag.)WO2016/128580; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1060805-69-7, 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. 1060805-69-7, name is 1-(4-Bromopyridin-2-yl)ethanone. A new synthetic method of this compound is introduced below.

Methyl 2-bromo benzoate (methyl-2-bromobenzoate) (1 eq.)Was dissolved in 180 mL THF, into the NaH (2 eq.) Was stirred for 30 minutes. After stirring, 1 – (4-bromo-2-yl) ethane-1-one (1- (4-bromopyridin-2-yl) ethan-1-one) was dropwise added (1 eq.) Slowly. Stirred for 2 hours at room temperature and heated at 100 16 hours. When the reaction is complete and then lower the temperature to room temperature, then extracted using ethyl acetate (ethyl acetate) and 1N HCl, aqueous NaHCO3, H2O. Purification separated by column chromatography to give a 12-1 after extraction.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1060805-69-7, 1-(4-Bromopyridin-2-yl)ethanone, and friends who are interested can also refer to it.

Reference:
Patent; Hee Sung Material Co., Ltd; Lee, Hyun Ju; Kim, Gi Yeong; Lee, Do Hyung; Choe, Jin Sok; Uhm, Song Jin; Lee, Ju Dong; (46 pag.)KR2016/1537; (2016); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 106877-33-2, name is 5-Amino-2-(trifluoromethyl)pyridine. This compound has unique chemical properties. The synthetic route is as follows. Safety of 5-Amino-2-(trifluoromethyl)pyridine

Oxalylchloride (132 muL, 1.5 mmol) was added dropwise to a stirred suspension of benzoicacid 124 (350 mg, 1.0 mmol) and DMF (1 drop) in dry THF (20 mL) and thesolution was stirred at 20 C. for 2 h, then at 66 C. for 1 h. The solutionwas cooled to 20 C., then the solvent was evaporated and the residue dissolvedin dry pyridine (10 mL). 6-Trifluoromethyl-3-pyridinylamine (180 mg, 1.1 mmol)was added and the solution stirred at 20 C. for 16 h. The solvent wasevaporated and the residue suspended in ice/water (50 mL) for 1 h. Theprecipitate was filtered, washed with water (5 mL) and dried. The crude solidwas purified by column chromatography, eluting with a gradient (50-100%) ofEtOAc/pet. ether, to give benzamide 136 (268 mg, 54%).

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, 106877-33-2, 5-Amino-2-(trifluoromethyl)pyridine.

Reference:
Patent; THEBOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY; AUCKLANDUNISERVICES LIMITED; SUTPHIN, PATRICK; CHAN, DENISE; TURCOTTE, SANDRA; DENNY, WILLIAMALEXANDER; HAY, MICHAELPATRICK; GIDDENS, ANNACLAIRE; BONNET, MURIEL; GIACCIA, AMATO; (181 pag.)JP5789603; (2015); B2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 61338-13-4, 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. 61338-13-4, name is 2-(4-Methyl-2-phenylpiperazin-1-yl)nicotinic acid, molecular formula is C17H19N3O2, 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 1000 ml three-necked flask, 600 ml of tetrahydrofuran, 2- (4-methyl-2-phenyl-1-piperazinyl)(134 g, 0.45 mol),Zinc chloride (306 g, 2.25 mol) was added sodium borohydride (85 g, 2.25 mol) in portions carefully. The temperature was raised to 60-85 C after addition and reflux with stirring for 16 hours, cooled to 0 C and carefully quenched with methanol The reaction mixture was removed under reduced pressure. 600 ml of 6N hydrochloric acid was added and the mixture was heated to 80 C with heating and stirred for 1 hour. The mixture was cooled to room temperature and extracted with methylene chloride (2 L × 3). The organic phase was dried over 1 kg of anhydrous sodium sulfate, A white solid was obtained. The white solid was further dried by blowing with air at 50 C to give 113 g of 1-(3-hydroxymethylpyridin-2-yl) -4-methyl-2-phenylpiperazine as a white solid in 89% yield.

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 61338-13-4, 2-(4-Methyl-2-phenylpiperazin-1-yl)nicotinic acid.

Reference:
Patent; Beijing Ha Sanlian Science And Technology Co., Ltd.; Harbin Sanlian Pharmaceutical Co., Ltd.; Liu Jinai; Li Yuanzhen; Ning Ruibo; Wang Mingxin; (8 pag.)CN105367571; (2017); B;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem