Tag: M.W:100-200

Adding a certain compound to certain chemical reactions, such as: 55052-27-2, 6-Chloro-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, Computed Properties of C7H5ClN2, blongs to pyridine-derivatives compound. Computed Properties of C7H5ClN2

PREPARATION 58 6-Methyl-1 H-pyrrolo[2,3-b]pyridine The title compound of Preparation 57 (1 .00 g, 6.55 mmol), 2, 4, 6-trimethyl-1 ,3,5,2,4,6- trioxatriborinane (1 .0 ml, 7.2 mmol) and potassium carbonate (2.72 g, 19.7 mmol) were suspended in 13 ml dimethoxyethane in a microwave reactor and submitted to three vacuum-argon cycles. [1 , 1 ‘-Bis(diphenylphosphino)ferrocene]-dichloropalladium (II) complex with dichloromethane (0.29 g, 0.33 mmol) was added and the resulting mixture was submitted to three further vacuum-argon cycles. The mixture was stirred at 120C for 2h under microwave irradiation. The mixture was allowed to cool and was filtered through Celite, eluting with ethyl acetate. The filtrate was evaporated under reduced pressure and the residue was purified using the Isolera Purification System (ethyl acetate-hexane gradient, 0:100 rising to 50:50) to give 0.57 g (4.31 mmol, 65%) of the title compound as a beige solid. Purity 98%. 1 H N MR (300 MHz, CHLOROFORM-d) delta ppm 10.87 (br. s., 1 H), 7.86 (d, J=7.63 Hz, 1 H), 7.29 (dd, J=3.52, 2.35 Hz, 1 H), 6.97 (d, J=7.63 Hz, 1 H), 6.47 (dd, J=3.52, 1 .76 Hz, 1 H), 2.69 (s, 3 H). HPLC/MS (15 min) retention time 2.57 min. LRMS: m/z 133 (M+1 ).

The synthetic route of 55052-27-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ALMIRALL, S.A.; VIDAL JUAN, Bernat; ALONSO DIEZ, Juan Antonio; BUIL ALBERO, Maria Antonia; EASTWOOD, Paul Robert; ESTEVE TRIAS, Cristina; LOZOYA TORIBIO, Maria Estrella; ROBERTS, Richard Spurring; VIDAL GISPERT, Laura; GONZALEZ RODRIGUEZ, Jacob; MIR CEPEDA, Marta; WO2013/10880; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 75711-01-2, 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. 75711-01-2, name is 6-Chloro-5-methoxypyridin-3-amine, molecular formula is C6H7ClN2O, 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.

The 2-chloro-3-methoxy-5-aminopyridine (1.83 g, 11.58 mmol) was dissolved in EtOH (50 mL) and palladium acetate (2.0 g, 9.0 mmol), l,3-bis(diphenylphosphino)propane (3.5 g, 5.3 mmol), triethylamine (8.4 g, 83.38 mmol) were added sequentially and a stream of carbon monoxide was bubbled through the solution for 10 min. A balloon filled with CO was attached to the reaction flask and the mixture was stirred at 60 0C for 18 h. The mixture was cooled and diluted with ethyl acetate, filtered through a pad of Celite and evaporated. Purification using silica gel chromatography using hexane/ethyl acetate mixture provided 310 mg of product.

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 75711-01-2, 6-Chloro-5-methoxypyridin-3-amine.

Reference:
Patent; SCIOS, INC.; WO2006/112828; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1570-45-2 ,Some common heterocyclic compound, 1570-45-2, molecular formula is C8H9NO2, 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.

General procedure: To a stirred solution of 5 (0.22 mL, 2.0 mmol) in THF (10 mL) was added LiAlH4 (113 mg, 3.0 mmol) at 0 C, and the resulting mixture was refluxed for 7 h. After cooling, the reaction was quenched with 10% NaOH (aq), and the aqueous mixture was extracted with EtOAc (10 mL 3). The extracts were combined, dried over K2CO3, and evaporated to give alcohol, which was used directly in the next step. To a stirred solution of the alcohol obtained above in DMF (5 mL) was added NaH (60%, 88 mg, 2.2 mmol) at 0 C, and the reaction mixture was stirred at room temperature for 0.5 h. To the reaction mixture was added benzyl chloride (0.23 mL, 2.0 mmol) at 0 C, and the reaction mixture was stirred at room temperature for 2 h. The reactionwas quenched with H2O, and the aqueous mixture was extracted with EtOAc (10 mL x 3). The extracts were combined, dried over K2CO3, and evaporated to give residue, which was chromatographed on silica gel (15 g, hexane:acetone = 10:1) to give 6a (250 mg, 63%) as a pale yellow oil.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1570-45-2, its application will become more common.

Reference:
Article; Ichihara, Yoshinori; Fujimura, Ryohei; Tsuneki, Hiroshi; Wada, Tsutomu; Okamoto, Kentaro; Gouda, Hiroaki; Hirono, Shuichi; Sugimoto, Kenji; Matsuya, Yuji; Sasaoka, Toshiyasu; Toyooka, Naoki; European Journal of Medicinal Chemistry; vol. 62; (2013); p. 649 – 660;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 52311-50-9, 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 52311-50-9, name is 2-Chloro-4-ethoxypyridine. This compound has unique chemical properties. The synthetic route is as follows.

6.01.22.02 1 – 4-ethoxy-pyridin-2-yl)-piperazine hydrochloride 860 mg piperazine was added to 350 mg 2-chloro-4-ethoxy-pyridine in 3.5 mL n-butanol. The reaction was stirred 1.5 days at 115C. The reaction was filtered and the filtrate was washed with water and evaporated. IN HCl was added to the residue and the precpipate was filtered to give 238 mg of the desired product. Rt: 0.3 min (method B), (M+H)+: 208

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 52311-50-9, 2-Chloro-4-ethoxypyridine.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; GRAUERT, Matthias; BISCHOFF, Daniel; DAHMANN, Georg; KUELZER, Raimund; RUDOLF, Klaus; WO2013/107761; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 89402-42-6, 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 89402-42-6, name is 2,3-Difluoro-5-(trifluoromethyl)pyridine. This compound has unique chemical properties. The synthetic route is as follows.

Example 1 Preparation of alpha-anti-methoxyimino-N-methyl-2-(3-fluoro-5-trifluoromethyl-2-pyridyloxy)methylphenyl-acetamide (No. I-1) A suspension of 1.4 g of sodium hydride in 15 ml of dimethylformamide (DMF) was mixed with a solution of 11.1 g of (E) -2-[2-(hydroxymethyl) phenyl]-2-methoxyimino-N-methylacetamide in 120 ml of DMF. The reaction mixture was exposed to ultrasound for about 10 min and subsequently stirred at about 20 to 25 C. for 1 h. A solution of 9.2 g of 2,3-difluoro-5-trifluoromethyl-pyridine in 85 ml of DMF was added dropwise and the mixture was stirred at 22 to 25 C. for about 24 h. The reaction mixture was taken up in 1 l of dilute sodium chloride solution and extracted with methyl tert-butyl ether (MtBE). The combined organic phases were washed with water and dried. The solvent was distilled off under reduced pressure and the residue was subjected to silica gel chromatography (cyclohexane/MtBE=2:1), affording 6.9 g of the title compound as a pale powder of mp. 112-116 C. IR (cm-1): 3380, 1659, 1623, 1498, 1453, 1336, 1272, 1151, 1131, 1040.

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 89402-42-6, 2,3-Difluoro-5-(trifluoromethyl)pyridine.

Reference:
Patent; BASF Aktiengesellschaft; US6372766; (2002); B1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 865156-59-8, 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. 865156-59-8, name is 4-Bromo-6-methylpyridin-2-ol, molecular formula is C6H6BrNO, 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.

Diisopropyl diazocarboxylate (323 mg, 1.60 mmol) was added to a solution of 4- bromo-6-methylpyridin-2-ol (200 mg, 1.06 mmol), methanol (54 ^L, 1.3 mmol) and triphenylphosphine (419 mg, 1.60 mmol) in THF (4.6 mL). The reaction mixture was stirred at r.t. for 18 h. Ethyl acetate was added and the mixture was washed with 1N NaOH (3x). The organic layer was dried with sodium sulfate, filtered and evaporated under reduced pressure. The crude product was purified by flash chromatography on silica gel using a solution of ethyl acetate in hexanes (5 to 10%) to give the title compound (65 mg, 0.32 mmol, 30%).

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 865156-59-8, 4-Bromo-6-methylpyridin-2-ol.

Reference:
Patent; BANTAM PHARMACEUTICAL, LLC; SIDDIQUI, M., Arshad; CIBLAT, Stephane; DERY, Martin; CONSTANTINEAU-FORGET, Lea; GRAND-MAITRE, Chantal; GUO, Xiangyu; SRIVASTAVA, Sanjay; SHIPPS, Gerald, W.; COOPER, Alan, B.; BRUNEAU-LATOUR, Nicolas; LY, Vu, Linh; (314 pag.)WO2016/196644; (2016); 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. 65515-39-1, name is 2-Methoxy-4,6-dimethylnicotinonitrile, the common compound, a new synthetic route is introduced below. COA of Formula: C9H10N2O

The 2-methoxy-4,6-dimethylnicotinic acid required as first starting material is obtained as follows: 97 g (0.6 mole) of 2-methoxy-4,6-dimethylnicotinonitrile and 230 g of solid potassium hydroxide are dissolved in 1000 ml of ethanol and 120 ml of water and the solution is refluxed under nitrogen for 82 hours. The mixture is cooled, the precipitated substance collected by filtration, and the bulk of the ethanol is distilled off from the filtrate in vacuo. The residue is dissolved in 500 ml of water and extracted with methylene chloride. The alkaline aqueous phase is adjusted to pH 3.3 with concentrated hydrochloric acid and the precipitated crude product is collected by filtration. Recrystallisation of this crude product from ethanol yields pure 2-methoxy-4,6-dimethylnicotinic acid (m.p. 210-215 C).

The synthetic route of 65515-39-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Ciba-Geigy Corporation; US4089960; (1978); A;,
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. 63237-88-7, name is Pyrazolo[1,5-a]pyridine-2-carboxylic acid. A new synthetic method of this compound is introduced below., category: pyridine-derivatives

Example 71N-((ls,4s)-4-(2-(4′-(((3S,5R)-3,5-dimethylpiperazin-l-yl)methyl)biphenyl-3-yloxy)-5- fluoronicotinamido)cyclohexyl)pyrazolo [ 1 ,5-a] pyridine-2-carboxamide HATU (0.069 g, 0.18 mmol) was added in one portion to N-((ls,4s)-4-aminocyclohexyl)-2- (4′-(((3 S ,5R)-3 ,5 -dimethylpiperazin- 1 -yl)methyl)biphenyl-3 -yloxy)-5 -fluoronicotinamide (0.08 g, 0.15 mmol), pyrazolo[l,5-a]pyridine-2-carboxylic acid (0.024 g, 0.15 mmol) and DIPEA (0.079 niL, 0.45 mmol) in acetonitrile (1 mL) at 250C under nitrogen. The resulting solution was stirred at 25 0C for 10 min. The reaction mixture was concentrated and diluted with EtOAc, and washed sequentially with saturated NaHCO3, saturated brine and water. The organic layer was dried over MgSO4, filtered and evaporated to afford crude product. The crude product was purified by preparative HPLC on a Waters X-Bridge column using a 95- 5% gradient of aqueous 0.1% TFA in acetonitrile as eluent. The fractions containing the desired compound were evaporated to dryness to afford the title compound as a white solid. Yield: 70 mg1H NMR (400 MHz, DMSO) delta 8.61 (d, J= 11.5 Hz, IH), 8.35 (d, J= 6.9 Hz, IH), 8.26 (d, J= 2.8 Hz, IH), 8.07 (dd, J= 3.1, 7.3 Hz, IH), 7.78 – 7.65 (m, 4H), 7.53 – 7.50 (m, 3H), 7.36 (d, J= 7.7 Hz, 2H), 7.30 (t, J= 7.7 Hz, IH), 7.23 – 7.21 (m, IH), 7.02 (t, J= 6.9 Hz, IH), 6.98 (s, IH), 3.38 – 3.28 (m, 2H), 3.10 – 3.04 (m, 2H), 2.56 – 2.44 (m, 4H), 2.23 – 2.14 (m, 2H), 1.84 1.67 (m, 9H), 1.17 (d, J= 10.4 Hz, 6H).MS: [M+H]+=676.3 (calc=676.3411) (MultiMode+)

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, 63237-88-7, Pyrazolo[1,5-a]pyridine-2-carboxylic acid.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2009/144494; (2009); 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. 42182-27-4, name is 2-Amino-4-cyanopyridine, the common compound, a new synthetic route is introduced below. Application In Synthesis of 2-Amino-4-cyanopyridine

NaN02 (0.99 g, 14.3 mmol) was added in small portions to a well stirred solution of the product of Step B (0.96 g, 8.1 mmol) in a premixed solution of concentrated H2S04 (1 .2 ml) and H20 (1 1 .5 ml) while the temperature of the reaction mixture was kept at ) 0 – 5C. The clear solution became heterogenous with evolution of N2. The mixture was allowed to warm up to room temperature with stirring, than heated on the water bath (reflux) for 30 min and cooled to room temperature. The solid formed was filtered off, washed with H20 and dried in vacuo to give the title product (0.9 g, 92%) as colourless solid. 1 H NMR (DMSO-d6) 8.21 (d, 1 H, J = 2.4 Hz), 7.61 (dd, 1 H, 2.4, 9.6 Hz), 6.38 (d, 1 H, J = 9.6 Hz), 3.3 (broad s, 1 H + 2H20).

The synthetic route of 42182-27-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; AKAAL PHARMA PTY LTD; GROBELNY, Damian W; GILL, Gurmit S; WO2014/63199; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 17322-91-7, name is 1H-Pyrrolo[3,2-b]pyridin-5(4H)-one, molecular formula is C7H6N2O, 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. Quality Control of 1H-Pyrrolo[3,2-b]pyridin-5(4H)-one

5-hydroxy -1H- pyrrolo [3,2] pyridine (10 mmol)Soluble in 40 ml of dichloromethane solution,Add 10 ml of triethylamine to it,Control temperature below 10 C,Add to the systema solution of 2-chloroacetyl chloride (12 mmol) in dichloromethane,After the addition is completed, return to room temperature.Stir at room temperature for 10 hours,The reaction system was then washed with 50 ml of a 5% aqueous solution of sodium carbonate.The organic phase is dried over anhydrous Na2SO4.After evaporating the solvent,The obtained solid is separated by flash column chromatography,Get 1.9 g light yellow2-Chloro-1-(5-hydroxy-1H-pyrrole[3,2]pyridin-1-yl)-ethanone solid,The yield was 90%.

With the rapid development of chemical substances, we look forward to future research findings about 17322-91-7.

Reference:
Patent; Sang Qi; (10 pag.)CN108218865; (2018); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem