Day: April 20, 2022

Adding a certain compound to certain chemical reactions, such as: 696-42-4, 5-Fluoronicotinonitrile, 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: C6H3FN2, blongs to pyridine-derivatives compound. HPLC of Formula: C6H3FN2

General procedure: (Reference Example 35) 5-[4-(5-Amino-1H-pyrazol-3-yl)piperidin-1-yl]pyridine-3-carbonitrileThe title compound (0.167 g, yield: 37%) was obtained through reaction in the same way as the method described in Reference Example 34 using 5-fluoropyridine-3-carbonitrile (0.204 g, 1.67 mmol) instead of 3,6-dichloropyridazine. 1H-NMR (400 MHz, DMSO-d6) delta: 11.13 (1H, brs), 8.59 (1H, d, J = 3 Hz), 8.28 (1H, d, J = 2 Hz), 7.78 (1H, dd, J = 3 Hz, 2 Hz), 5.20 (1H, brs), 4.45 (2H, brs), 3.94-3.87 (2H, m), 2.93-2.85 (2H, m), 2.73-2.64 (1H, m), 1.94-1.87 (2H, m), 1.65-1.55 (2H, m).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,696-42-4, 5-Fluoronicotinonitrile, and friends who are interested can also refer to it.

Reference:
Patent; Daiichi Sankyo Company, Limited; KOBAYASHI, Hideki; OHKAWA, Nobuyuki; TAKANO, Daisuke; KUBOTA, Hideki; ONODA, Toshio; KANEKO, Toshio; ARAI, Masami; TERASAKA, Naoki; EP2862861; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 59020-10-9, 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.59020-10-9, name is 3-(Tributylstannyl)pyridine, molecular formula is C17H31NSn, molecular weight is 368.1447, as common compound, the synthetic route is as follows.

General procedure: Aryl halide (0.5 mmol), base (1 mmol), CuI (20 mol %), alkylstannylpyridine(0.75 mmol), and catalyst (1 mol %) were dissolvedin DMF (2 mL) in a 10 mL vial and heated at a specific temperatureunder N2 for 12 h. After the reaction was complete, and thenquenched with water. The mixture was diluted with ethyl acetate(10 mL), filtered through a pad of Celite, and followed by extractionwith ethyl acetate for three times. The combined organic layer wasdried over anhydrous Na2SO4, filtered, and evaporated under reducedpressure. The residual was purified by flash chromatographyon silica gel (ethyl acetate/hexane) to give the desired product.

Statistics shows that 59020-10-9 is playing an increasingly important role. we look forward to future research findings about 3-(Tributylstannyl)pyridine.

Reference:
Article; Ma, Gaizhi; Leng, Yuting; Wu, Yusheng; Wu, Yangjie; Tetrahedron; vol. 69; 2; (2013); p. 902 – 909;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 1187322-51-5, 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.1187322-51-5, name is 6-Amino-5-iodonicotinonitrile, molecular formula is C6H4IN3, molecular weight is 245.02, as common compound, the synthetic route is as follows.

To the solution of 3-iodo-5-isocyanopyridin-2-amine (2.74 g, 11.2 mmol, 1 eq) in anhydrous dimethylformamide (25 mL) in a 100 mL round bottom flask was added ammonium chloride (1.02 g, 1.7 eq) and sodium azide (1.24 g, 1.7 eq). The resulting reaction mixture was heated to 100 C. under nitrogen for 20 hours. After the reaction mixture was cooled to room temperature, it was poured into ice-chunk filled water and the pH of the mixture was adjusted to ?3.5 using aqueous hydrochloric acid (2 N). After the mixture was stirred at room temperature for about two hours, it was filtered through a Buchner funnel, rinsed with water, giving a brown solid. The solid was treated with MeOH-CHCl3 and concentrated down with silica gel. Upon gradient column chromatography (MeOH-EtOAc 1:20 to 1:5), 3-iodo-5-(2H-tetrazol-5-yl)pyridin-2-amine was obtained as off-white solid in the amount of 1.15 g. 1H NMR (600 MHz, DMSO-d6) delta ppm 8.60 (d, J=1.76 Hz, 1H) 8.45 (d, J=2.05 Hz, 1H) 6.77 (br. s., 2H).

Statistics shows that 1187322-51-5 is playing an increasingly important role. we look forward to future research findings about 6-Amino-5-iodonicotinonitrile.

Reference:
Patent; Allergan, Inc.; Boral, Sougato; Malone, Thomas C.; Wang, Shimiao; Rao, Sandhya; Yang, Rong; (28 pag.)US2016/102081; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 483324-01-2, 2-Chloro-4-(pyridin-3-yl)pyrimidine, 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, Formula: C9H6ClN3, blongs to pyridine-derivatives compound. Formula: C9H6ClN3

Preparation of 4-pyridin-3-yl-pyrimidin-2-ylamine lll-b In a sealed tube, a solution of lll-a (1 .18 g, 6.16 mmol) in 30percent NH4OH (12 mL) was heated at deltaOmicron ‘ for 16h. After cooling, the precipitate was isolated by filtration, washed with water and dried under vacuum to give the title compound lll-b as a beige solid (925 mg, 87 percent). H NMR (400 MHz, DMSO-d6) delta 9.23 (d, J = 2.1 Hz, 1 H), 8.69 (dd, J = 4.7, 1 .3 Hz, 1 H), 8.43 – 8.38 (m, 1 H), 8.36 (d, J = 5.1 Hz, 1 H), 7.53 (dd, J = 8.0, 4.8 Hz, 1 H), 7.21 (d, J = 5.1 Hz, 1 H), 6.76 (s, 2H).

The synthetic route of 483324-01-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; AB SCIENCE; MOUSSY, Alain; BENJAHAD, Abdellah; SCHALON, Claire; PEZ, Didier; CHEVENIER, Emmanuel; SANDRINELLI, Franck; MARTIN, Jason; PICOUL, Willy; WO2014/202763; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 1075-62-3 ,Some common heterocyclic compound, 1075-62-3, molecular formula is C7H9N3O, 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.

In a 25 mL round bottom flask, 5-(methoxymethylene)-2,2-dimethyl-i,3-dioxane- 4,6-dione (6.06 g, 32.5 mmol) was added to a stirred mixture of N-(6-aminopyridin-2- yl)acetamide (4.10 g, 27.1 mmol) in EtOH (5 ml) at room temperature. After the reaction mixture was stirred at 80C for 3 hr, it was cooled down to room temperature and then concentrated under vacuum to give the title compound as a solid. LCMS (ESI) calc?d for C,4H,5N305 [M+i ]: 306,found: 306; ?H NMR (300 MHz, CDC13): oei i.18(s, 1H), 9.27 (d, J= 4.2 Hz, 1H), 8.06 (d, J= 8.4 Hz, 1H), 7.90 (s,1H),7.77-7.72(m,1H), 6.73 (d, J= 7.8 Hz, 1H),2.26 (s,3H), 1.76 (s,6H).

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. 1075-62-3, N-(6-Aminopyridin-2-yl)acetamide, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; MERCK SHARP & DOHME CORP.; BENNETT, Frank; JIANG, Jinlong; PASTERNAK, Alexander; DONG, Shuzhi; GU, Xin; SCOTT, Jack D.; TANG, Haiqun; ZHAO, Zhiqiang; HUANG, Yuhua; HUNTER, David; YANG, Dexi; ZHANG, Zhibo; FU, Jianmin; BAI, Yunfeng; ZHENG, Zhixiang; ZHANG, Xu; YOUNG, Katherine; XIAO, Li; (580 pag.)WO2016/206101; (2016); A1;,
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.945954-94-9, name is Methyl 6-bromo-3-methoxypicolinate, molecular formula is C8H8BrNO3, molecular weight is 246.06, as common compound, the synthetic route is as follows.HPLC of Formula: C8H8BrNO3

(step .4); To a solution of the compound obtained in step 3 (7.56 g) in THF (110 mL) was added diisobutylaluminum hydride (DIBAL-H) ( 1.5M toluene solution, 24.6 mL) at -78C, and the mixture was stirred at -78C for 1 hr. To the reaction mixture was added saturated aqueous Rochelle salt, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated. The residue was purified by silica gel column chromatography (solvent gradient; 0->33% ethyl acetate/hexane) and crystallized from ethyl acetate/hexane to give 6-bromo-3-methoxypyridine-2- carbaldehyde (5.36 g, 81%) as white crystals,

At the same time, in my other blogs, there are other synthetic methods of this type of compound,945954-94-9, Methyl 6-bromo-3-methoxypicolinate, and friends who are interested can also refer to it.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; WO2007/89031; (2007); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 58602-02-1, 2,6-Difluoro-3-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, 58602-02-1, blongs to pyridine-derivatives compound. name: 2,6-Difluoro-3-nitropyridine

Step A 2,6-difluoro-3-nitropyridine (14.68g,91.8mmol) was added to a mixture of DL-alanine ethyl ester hydrochloride (14.09g 92mmol) and potassium carbonate (25.3g, 183mmol) in acetonitrile (200ml) and the mixture stirred for 2 hours at room temperature. The reaction mixture was poured into water and extracted several times with ethyl acetate; the combined extracts were dried (MgSO4) and the solvent removed in vacuo leaving a viscous orange-yellow residue which solidified on standing. The solid was triturated with hexane and the solvent removed from the hexane soluble fraction leaving ethyl DL-2-[6-fluoro-3-nitropyridyl-2-amino]propionate as a yellow solid m.p. 49-51 C.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,58602-02-1, its application will become more common.

Reference:
Patent; Imperial Chemical Industries PLC; US5133798; (1992); A;,
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 183483-29-6, name is 2-(2-Bromopyridin-4-yl)acetic acid. This compound has unique chemical properties. The synthetic route is as follows. category: pyridine-derivatives

2-(2-bromopyridin-4-yl)acetic acid (0.9685 g, 4.48 mmol) was dissolved in a mixture of toluene (20 ml)/MeOH (2.50 ml) then cooled to 0C. Trimethyl- silyldiazomethane (5.60 ml, 11.21 mmol) was added. The reaction was stirred at 0C for 1 hr then concentrated to yield methyl 2-(2-bromopyridin-4-yl)acetate. LC/MS [M+H]+: 231.4

With the rapid development of chemical substances, we look forward to future research findings about 183483-29-6.

Reference:
Patent; MERCK SHARP & DOHME CORP.; TANG, Haifeng; YANG, Shu-Wei; MANDAL, Mihir; SU, Jing; LI, Guoqing; PAN, Weidong; TANG, Haiqun; DEJESUS, Reynalda; PAN, Jianping; HAGMANN, William; DING, Fa-Xiang; XIAO, Li; PASTERNAK, Alexander; HUANG, Yuhua; DONG, Shuzhi; YANG, Dexi; WO2015/171474; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 1187322-51-5, 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. 1187322-51-5, name is 6-Amino-5-iodonicotinonitrile, molecular formula is C6H4IN3, 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 the degassed mixture of 6-amino-5-iodopyridine-3-carbonitrile (329 mg, 1 34 mmol), bis(triphenylphosphine)dichloropalladium(0) (95 mg, 0.134 mmol), Cul (128 mg, 0.671 mmol) and TEA (976 mg, 1.34 mL, 9.64 mmol) in absolute THF (18 mL), a propyne solution (3-4 % in THF; 13.2 mL) was added via septum at 0-5 C. The mixture was stirred for 30 minutes at 0-5 C, then for further 18 hours at room temperature. The reaction was quenched by the addition of NH4C1 solution. The solid was removed by filtration, and the cake was washed with CH2.CI2. The combined organic layer was dried over anhydrous Na2S()4, filtered and concentrated in vacuo. The crude product was purified by flash chromatography on silica, eluted by 40 % EtOAc in cyclohexane to obtain 150 mg of 6- amino-5-(prop-l-yn-l-yl)pyridine-3-carbonitrile as a yellow solid (71 %).

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 1187322-51-5, 6-Amino-5-iodonicotinonitrile.

Reference:
Patent; RICHTER GEDEON NYRT.; LEDNECZKI, Istvan; ELES, Janos; TAPOLCSANYI, Pal; HORVATH, Anita; NEMETHY, Zsolt; LEVAY, Gyoergy Istvan; GALAMBOS, Janos; (0 pag.)WO2020/12424; (2020); 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. 886365-46-4, name is 5-Chloro-3-methylpyridine-2-carboxylic acid, the common compound, a new synthetic route is introduced below. category: pyridine-derivatives

Thionyl chloride (71 mu, 962 muiotaetaomicron) is added to a mixture of 5-chloro-3-methyl-pyridine-2- carboxylic acid (150 mg, 874 muiotaetaomicron), toluene (1 ml) and DMF (20 mu). The mixture is heated to 60C for 1 hour. The mixture is concentrated in vacuo and the crude product used directly without further purification.

The synthetic route of 886365-46-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; REISER, Ulrich; WO2015/25018; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem