Tag: M.W:100-200

Related Products of 83766-88-5, 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. 83766-88-5, name is 2-(tert-Butoxy)pyridine, molecular formula is C9H13NO, 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.

Carboxylic acid (0.2 g, 1.64 mmol), tert-butoxypyridine (0.33 g, 2.21 mmol) and boron trifluoride diethyl etherate (0.31 g, 2.21 mmol) in dry PhCH3 (2 mL) were added to a 20-ml vial. The reaction mixture was then allowed to stir at room temperature for 30 min before quenching with anhydrous NaHCO3. The reaction mixture was diluted with ethyl acetate (30 mL), then washed with water (20 mL), followed by brine (20 mL). The organic layer was dried over anhydrous sodium sulfate and carefully concentrated under reduced pressure. The resulting residue was then purified by flash column chromatography on silica gel with 0:4 to 1:4 dichloromethane/hexane as eluent to yield the desired product 5a as a colorless oil.

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 83766-88-5, 2-(tert-Butoxy)pyridine.

Reference:
Article; La, Minh Thanh; Kim, Hee-Kwon; Tetrahedron; vol. 74; 27; (2018); p. 3748 – 3754;,
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. 769-54-0, name is 3-Fluoro-4-nitropyridine 1-oxide, the common compound, a new synthetic route is introduced below. Application In Synthesis of 3-Fluoro-4-nitropyridine 1-oxide

To a mixture suspension of 3-fluoro-4-nitropyridine 1-oxide (9.75 g, 61.7 mmol) and methanol (145 mL) was added 28% sodium methoxide methanol solution (11.9 g, 61.7 mmol) with cooling with ice. This mixture was heated to room temperature and stirred for 1 hour at the temperature. The methanol was distilled off under reduced pressure. Water (50 mL) was added to the residue, followed by extracting with chloroform. The organic layer was washed with brine, and anhydrous sodium sulfate was added to dry the layer. After anhydrous sodium sulfate was removed by filtration, the solvent was distilled off under reduced pressure to obtain 3-methoxy-4-nitropyridine 1-oxide (9.54 g; yield, 91%).

The synthetic route of 769-54-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ISHIHARA SANGYO KAISHA, LTD.; KIRIYAMA, Kazuhisa; MATSUMOTO, Masahiro; YOSHIDA, Kotaro; BOLDBAATAR, DamdinSuren; JUKUROGI, Tatsuya; UMEMOTO, Nao; KANI, Tatsuya; MATSUDA, Yoko; TANAKA, Kumiko; KANUMA, Michiko; SHIMADA, Tatsuya; WO2014/98259; (2014); 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. 61494-55-1, name is 2-(2-Chloropyridin-3-yl)acetic acid, the common compound, a new synthetic route is introduced below. SDS of cas: 61494-55-1

(Step 5) To a solution of the compound (3.40 g) obtained in step 4, N-benzylethanolamine (4.53 g) and HOBt·H2O (4.60 g) in DMF (50 mL) was added WSC·HCl (5.80 g), and the mixture was stirred at room temperature for 4 days. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium hydrogen carbonate solution and brine, and concentrated. The residue was purified by silica gel column chromatography (solvent gradient; 80% ethyl acetate/hexane ? 2% methanol/ethyl acetate) to give N-benzyl-2-(2-chloropyridin-3-yl)-N-(2-hydroxyethyl)acetamide (6.20 g, 100%) as a pale-yellow oil. 1H-NMR(CDCl3): delta 3.49-3.98(6H,m), 4.69-4.71(2H,m), 7.20-7.46(6H,m), 7.63-7.69(1H,m), 8.30(1H,dd,J=4.8,1.8Hz)

The synthetic route of 61494-55-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Takeda Pharmaceutical Company Limited; EP2018863; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 1452-94-4, 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. 1452-94-4, name is Ethyl 2-chloronicotinate, molecular formula is C8H8ClNO2, 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.

In a 500 mL dry round bottom flask with reflux condenser and magnetic stirrer was placed with 2-chloro-3-ethyl nicotinate (40.0 g, 215.5 mmol) in methanol (200 mL). CH3ONa in methanol (25%, 65 mL, 301.7 mmol) was added slowly and the reaction mixture was refluxed for 16 h. The reaction was cooled to rt, quenched by addition of a saturated aqueous NH4Cl solution. The aqueous mixture was extracted with ethyl acetate. The combined organic layers were washed well with water, brine, dried over Na2SO4 and concentrated to give 35 g of 2-methoxy-3-methyl nicotinate with 97% yield. Sodium hydride (60% in oil, 9.21 g, 230.3 mmol) was added to a dry 500 mL round bottom flask followed by 100 mL DMF. 4-Methoxyacetophenone (31.45 g, 209.44 mmol) in 50 mL dry DMF was added dropwise at 0 C. over 30 min. The reaction mixture was stirred for 1 h at rt. 2-Methoxynicotinic acid methyl ester (35 g, 209.44 mmol) was dissolved in 50 mL dry DMF and added slowly, keeping the temperature at 0 C. The mixture was stirred for 16 h at rt, then quenched by addition of a saturated aqueous NH4Cl solution and diluted with water. The solid was filtered off, washed with water and dried to give 56.7 g diketo product in 95% yield.

According to the analysis of related databases, 1452-94-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; RVX Therapeutics Inc.; McLure, Kevin G.; Young, Peter R.; US2013/281396; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 99368-68-0, 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.99368-68-0, name is 6-Chloro-5-(trifluoromethyl)pyridin-3-amine, molecular formula is C6H4ClF3N2, molecular weight is 196.5576, as common compound, the synthetic route is as follows.

(0876) Under ice-cooling, thionyl chloride (4 ml) was added dropwise over 20 minutes to water (27 ml). The mixture was stirred overnight for 12 hours to give a SO2 containing solution. Separately, Compound 288C (1.14 g) in dioxane (5 ml) was added to concentrated HCl (20 ml) at 0 C. The solution was stirred for 5 minutes. To this suspension/solution was added sodium nitrite (0.44 g) in water (6 ml) dropwise at 0 C. The solution was stirred at 0 C. for 3 hours. During this time, any solid formed was crushed with a glass rod to make sure that Compound 288C was completely reacted. To the SO2 containing solution was added copper(I) chloride (0.115 g). Then, to this solution was added the diazotized Compound 288C at 0 C. The solution was stirred for 30 minutes. The reaction mixture was extracted with ethyl acetate. The combined organic layers were washed with brine, dried over MgSO4, filtered, and concentrated under reduced pressure. The residue was purified by flash column chromatography on silica gel eluting with 5% ethyl acetate in hexanes to provide the title compound.

The chemical industry reduces the impact on the environment during synthesis 99368-68-0, I believe this compound will play a more active role in future production and life.

Reference:
Patent; AbbVie Inc.; Catron, Nathaniel; Lindley, David; Miller, Jonathan M.; Schmitt, Eric A.; Tong, Ping; US10213433; (2019); B2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 13958-93-5, Adding some certain compound to certain chemical reactions, such as: 13958-93-5, name is 3,5-Dichloroisonicotinic acid,molecular formula is C6H3Cl2NO2, 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 13958-93-5.

EXAMPLE 1A 3,5-Dichloroisonicotinamide A solution of 3,5-dichloro-isonicotinic acid (9.54 g, 49.6 mmol, commercially available form TCI) in benzene (100 mL) was treated with oxalyl chloride (8.7 mL), a catalytic amount of DMF (5 drops), stirred overnight at room temperature, and concentrated under reduced pressure. The residue was dissolved in diglyme (10 mL) and added dropwise to 35% NH2OH in water (150 mL). The mixture was filtered to provide 8.2 g of the title compound as a white powder. MS ((DCI (+)) m/e 190.9 (M+H)+.

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. 13958-93-5, 3,5-Dichloroisonicotinic acid, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Dai, Yujia; Hartandi, Kresna; Michaelides, Michael R.; US2006/178378; (2006); 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 184416-84-0, name is 2,3-Dichloroisonicotinic acid. This compound has unique chemical properties. The synthetic route is as follows. SDS of cas: 184416-84-0

2,3-Dichloro-isonicotinic acid methyl ester[00197] To a suspension of 2,3-dichloro-isonicotinic acid (7.7 g, 40 mmol) in dichloromethane (45 mL) were added DMF (0.1 mL) and oxalyl chloride (17.5 mL, 200 mmol). The reaction mixture was stirred at room temperature for 18 hours and then concentrated under reduced pressure. The resultant residue was azeotroped with toluene, then cooled to 00C and dissolved in methanol (135 mL). The mixture was allowed to warm to room temperature and then concentrated under reduced pressure to give a residue. The residue was dissolved in ethyl acetate and the resulting solution was washed with a saturated solution of sodium hydrogen carbonate, water and brine, dried (Na2SO4), filtered and concentrated to give the title compound as a colourless oil that crystallised on standing (7.9 g, 96%). 1H NMR (CDCl3, 400MHz) 8.38 (d, J = 5.0 Hz, IH), 7.52 (d, J = 5.0 Hz, IH), 3.99 (s, 3H).

With the rapid development of chemical substances, we look forward to future research findings about 184416-84-0.

Reference:
Patent; GENENTECH, INC.; WO2009/85980; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 22918-01-0, 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.22918-01-0, name is 2-Bromo-4-chloropyridine, molecular formula is C5H3BrClN, molecular weight is 192.441, as common compound, the synthetic route is as follows.

Preparation of 2-bromo-3-methyl-4-chloro-pyridine To a solution of 2,2,6,6-tetramethyl-pyridine (21.1 mL, 125 mmol) in freshly distilled THF (120 mL) at -78C was added nBuLi (50 mL, 125 mmol) in 30 min. The resulting mixture was stirred at -78C for 30 min and was added through a cannula over 30 min to a solution of 3-bromo-4-chloro-pyridine (20.0 g, 104 mmol) in freshly distilled THF (60 mL) that had been cooled to -78C prior to the addition. The reaction mixture was stirred at -78C for 30 min before iodomethane (7.78 mL, 125 mmol) was added over a period of 10 min. The reaction was stirred at -78C for 30 min and was allowed to warm up to room temperature prior to be quenched with aqueous NH4Cl (65 mL). The aqueous phase was extracted with ethyl acetate (2X150 mL). The organic phases were separated, dried, and concentrated. The residue was purified by flash silica column chromatography (hexane:ethyl acetate, 5:1) to afford the title compound as a yellow solid (10.6 g, 49%). 1H NMR (CDCl3, 300 MHz) delta ppm: 8.10 (d, J = 5.1 Hz, 1 H), 7.27 (d, J = 5.1 Hz, 1H), 2.51 (s, 3 H).

The chemical industry reduces the impact on the environment during synthesis 22918-01-0, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Emergent Product Development Gaithersburg Inc.; Roussel, Patrick; Heim, Jutta; Schneider, Peter; Bartels, Christian; Liu, Yaoquan; Dale, Glenn; Milligan, Daniel; (107 pag.)EP3034078; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 107867-51-6, 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 107867-51-6, name is 5-(Trifluoromethyl)pyridine-2,3-diamine. This compound has unique chemical properties. The synthetic route is as follows.

Step 2: A mixture of compound 1.2 (0.2 mmol) and thiocarbonyldiimidazole (0.2 mmol) in dry THF (2.0 mL) was stirred at room temperature for 30 minutes under an atmosphere of N2. 5-Trifluoromethyl-pyridine-2,3-diamine (0.2 mmol) was added and the reaction stirred at room temperature until the reaction was deemed complete. The reaction mixture was then treated with N,N’-dicyclohexylcarbodiimide (0.2 mmol) and the resulting mixture was stirred at 40-60 C. for several hours. The solvent was removed and the residue was purified by preparative HPLC to give the titled compound. 1H NMR (CD3OD, 400 MHz): delta 8.76 (s, 1H), 8.51 (s, 1H), 8.38 (s, 1H), 7.95 (s, 1H), 7.56 (d, J=7.3 Hz, 2H), 7.48 (s, 1H), 7.38 (d, J=6.4 Hz, 2H), 4.03 (s, 2H), 3.09 (s, 2H) ppm; EIMS (m/z): 456.1 (M++H).

According to the analysis of related databases, 107867-51-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Lew, Willard; Baskaran, Subramanian; Oslob, Johan D.; Yoburn, Joshua C.; Zhong, Min; US2006/35908; (2006); 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. 64951-08-2, name is Imidazo[1,2-a]pyridine-2-carboxylic acid. A new synthetic method of this compound is introduced below., name: Imidazo[1,2-a]pyridine-2-carboxylic acid

Step (a) tert-butyl {cis-4-[(imidazo[l,2-a]pyridin-2- ylcarbonyl)amino] cyclohexyl} carbamate, O Imidazo[l,2a]pyridine-2-carboxyli acid (5 g, 30.8 mmol) was dissolved in NMP (200 ml) and DIEA (11.96 g, 16.43 ml) was added, followed by O-(7-Azabezotriazol-l-yl)- N,N,N’,N’-tetramethyluronium hexafluorophosphate (14.07 g, 37 mmol). The reaction was stirred for 5 min. (4-Amino-cyclohexyl)-carbamic acid tert-butyl ester (6.61 g, 30.8 mmol) was then added and the solution stirred at room temperature ovenight. Water was added and the product extracted with ethyl acetate. The organic phase was dried (anhydrous magnesium sulphate), filtered and concentrated in vacuo to afford the sub-title compound (8.5 g, contains some NMP). This was used without further purification. APCI (+ve) m/z: 359 [M+H]

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, 64951-08-2, Imidazo[1,2-a]pyridine-2-carboxylic acid.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2008/84223; (2008); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem