Category: pyridine-derivatives

Related Products of 636-73-7, Adding some certain compound to certain chemical reactions, such as: 636-73-7, name is Pyridine-3-sulfonic acid,molecular formula is C5H5NO3S, 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 636-73-7.

PREPARATION 1 Pyridine-3-sulfonyl chloride hydrochloride A mixture of pyridine-3-sulfonic acid (15.0 g), phosphorous pentachloride (24.0 g) and phosphorous oxychloride (30 mL) was heated to 120 C. for 16 h. The reaction was cooled to room temperature, and the resulting suspension was saturated with HCl (g). A white precipitate was collected, washed with CHCl3, and dried in vacuo to afford the title compound (15.6 g). 1 H NMR (400 MHz, DMSO) delta 8.98 (s, 1H), 8.85 (d, 1H), 8.66 (d, 1H), 8.02 (t, 1H).

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. 636-73-7, Pyridine-3-sulfonic acid, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Pfizer Inc.; US6124314; (2000); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 55279-29-3, 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. 55279-29-3, name is 3-Aminoisonicotinaldehyde, molecular formula is C6H6N2O, 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.

3-Amino-pyridine-4-carbaldehyde (5.00 g, 40.9 mmol) was dissolved in DCM (60 mL), ethyl 4-piperidinecarboxylate (7.57 mL, 49.1 mmol) and NaBH(OAc)3 (10.4 g, 49.1 mmol) were added and the reaction mixture was heated in a microwave reactor at 60 C. for 5 min. The reaction mixture was diluted with DCM (100 mL) and quenched with sat aq Na2CO3 (50 mL). The organic fraction was washed with sat aq NH4Cl (30 mL). The combined aq fractions were extracted with DCM (2*50 mL) and the combined organic fractions were dried (MgSO4) and concentrated in vacuo to give the crude title compound as a yellow gum (11.3 g). LCMS (ES+): 264.1 [MH]+.

According to the analysis of related databases, 55279-29-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; PROXIMAGEN LIMITED; Evans, David; Carley, Allison; Stewart, Alison; Higginbottom, Michael; Savory, Edward; Simpson, Iain; Nilsson, Marianne; Haraldsson, Martin; Nordling, Erik; Koolmeister, Tobias; US2014/357623; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 130722-95-1, Adding some certain compound to certain chemical reactions, such as: 130722-95-1, name is 3-(Benzyloxy)-5-bromopyridine,molecular formula is C12H10BrNO, 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 130722-95-1.

3-Benzyloxy-5-bromopyridine (4.73 g, 18.0 mmol) was dissolved in tetrahydrofuran (25 rnL) and cooled to 0 0C.Isopropylmagnesiumchloride (10 mL, 2.0 M in THF) was syringed in and the reaction mixture was stirred for 2 hrs at room temperature. N.N-dimethylformamide (3 mL) in tetrahydrofuran (10 mL) was added and stirring was continued for an additional hour. The solution was quenched with 2 N HCl to pH of 3 then partitioned between ethyl acetate and water. The organic layer was separated and concentrated to give a residue which was purified using flash chromatography to give 3-benzyloxy-5-formylpyridine (2.00 g, 53%) as white solid. 1H NMR (DMSO-^6): delta 10.1 (s, IH), 8.72 (d, IH), 8.66 (d, IH), 7.84 (m, IH), 7.42-7.48 (m, 5H), 5.28 (s, 2H).

According to the analysis of related databases, 130722-95-1, the application of this compound in the production field has become more and more popular.

Reference:
Patent; SIGNAL PHARMACEUTICALS, LLC; WO2007/84560; (2007); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 17997-47-6, 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. 17997-47-6, name is 2-(Tributylstannyl)pyridine, molecular formula is C17H31NSn, 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.

A mixture of 2-tri-n-butylstannylpyridine (18.4 g, 0.05 mol), 1,5-dibromo-2,4-dimethyl-benzene (5.3 g, 0.02 mol), bis(triphenylphosphine) palladium(II) chloride (0.28 g, 0.4 mmol) and lithium chloride (6.4 g, 0.15 mol) in dry toluene (50 mL) was heated at 116 C under N2 for 24 h. After the reaction mixture cooled to room temperature, saturated KF solution (50 mL) was added and the solution stirred for 30 min. The precipitated solid was removed by filtration and washed with water (50 mL). NaHCO3 solution (10%, 150 mL) was then added to the combined filtrates, extracted with dichloromethane (3×200 mL), and dried over MgSO4. Removal of solvent under reduced pressure and purification of the residue by column chromatography (silica, hexane/dichloromethane=8:1; V/V) gave the desired product as a pale yellow solid (3.62 g, 69%).

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 17997-47-6, 2-(Tributylstannyl)pyridine.

Reference:
Article; Tan, Shuai; Wu, Xiugang; Zheng, Yanqiong; Wang, Yafei; Chinese Chemical Letters; vol. 30; 11; (2019); p. 1951 – 1954;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 65156-94-7 ,Some common heterocyclic compound, 65156-94-7, molecular formula is C7H5ClN2, 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.

B. 1-Benzenesulfonyl-5-chloro-1H-pyrrolo[3,2-b]pyridine The title compound is prepared from 5-chloro-1H-pyrrolo[3,2-b]pyridine as described in EXAMPLE 41, Part A. The crude product is purified by column chromatography eluding with a gradient of 10% EtOAc/hexanes to 20% EtOAc/hexanes to give the title compound as a solid. 1H NMR (CDCl3, 300 MHz) delta8.23 (d, 1H), 7.87 (d, 2H), 7.81 (d, 1H), 7.62 (m, 1H), 7.49 (m, 2H), 7.26 (d, 1H) 6.81 (d, 1H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,65156-94-7, its application will become more common.

Reference:
Patent; Aventis Pharma Deutschland GmbH; US6281227; (2001); B1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 69879-22-7 ,Some common heterocyclic compound, 69879-22-7, molecular formula is C6H6N2O, 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.

The crude product (1.7 g, 13.9 mmol) of 6-aminopyridine-3-carbaldehyde synthesized in Referential Example 6 and tert-butylpiperazine-1-carboxylate (3.2 g, 17.2 mmol) were dissolved in dichloromethane (50 mL). The solution was stirred at room temperature for eight hours. Sodium triacetoxyborohydride (8.84 g, 40.9 mmol) was added to the reaction solution, and the reaction mixture was stirred at room temperature for two hours. The progress of the reaction was monitored by LC/MS. After the completion of the reaction, the reaction was quenched by addition of saturated aqueous sodium carbonate solution (50 mL). The solution was extracted with ethyl acetate (50 mL) three times. The extracted organic phases were combined, washed with brine (100 mL) once, and dried over anhydrous sodium sulfate. The solid was filtered out, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography to give the crude title compound (3.3 g, yield: 81%).

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. 69879-22-7, 6-Aminonicotinaldehyde, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Teijin Pharma Limited; MIZUNO, Tsuyoshi; SHIMADA, Tomohiro; UNOKI, Gen; MARUYAMA, Akinobu; SASAKI, Kosuke; YOKOSAKA, Takuya; TAKAHASHI, Hiroshi; HORIE, Kyohei; SAKAI, Yuri; (181 pag.)EP3546458; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 603310-75-4, 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.603310-75-4, name is 5-Isopropylpyridin-2-amine, molecular formula is C8H12N2, molecular weight is 136.1943, as common compound, the synthetic route is as follows.

Step C: Synthesis of 5 2-(5-isopropylpyridin-2-yl)-6-methoxyisoindolin-l-one; NaOEt, EtOH; [0210] A mixture of ethyl 2-(bromomethyl)-5-methoxybenzoate (0.200 g, 0.73 mmol), 5- isopropylpyridin-2-amine (0.118 g, 0.87 mmol) and sodium ethoxide (0.149 g, 2.19 mmol) in ethanol (15 mL) was heated to 120 0C overnight. The mixture was cooled to room temperature and concentrated. The residue obtained was partitioned between water and ethyl acetate. The organic layer was separated, washed with brine solution, dried over sodium sulfate, filtered, and concentrated. Purification by flash chromatography (silica, gradient 0- 20%, ethyl acetate/hexanes) afforded 2-(5-isopropylpyridin-2-yl)-6-methoxyisoindolin-l-one (0.023 g, 9%) as an off-white solid: m.p. 109-110 0C; 1H NMR (500 MHz, CDCl3) delta 8.56 (d, J= 8.6 Hz, IH), 8.25 (d, J= 2.4 Hz, IH ), 7.64 (dd, J= 8.6, 2.4 Hz, IH), 7.43-7.39 (m, 2H), 7.17 (dd, J= 8.3, 2.4 Hz, IH), 5.03 (s, 2H), 3.89 (s, 3H), 2.97-2.92 (m, IH), 1.29 (d, J= 7.0 Hz, 6H); ESI MS m/z 283 [M+ H]+.

The chemical industry reduces the impact on the environment during synthesis 603310-75-4, I believe this compound will play a more active role in future production and life.

Reference:
Patent; The United States of America, as represented by the Secretary, Department of Health and Human Services; Science Applications International Corporation (SAIC); Albany Molecular Research, Inc.; WO2009/42907; (2009); 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. 33252-64-1, name is 3-Nitro-5-(trifluoromethyl)pyridin-2(1H)-one. A new synthetic method of this compound is introduced below., Application In Synthesis of 3-Nitro-5-(trifluoromethyl)pyridin-2(1H)-one

2-Hydroxy-3-nitro-5-trifluoromethylpyridine (8.8 g, 42.3 mmol) was added to a mixture of phosphorous oxychloride (4.2 mL, 45.9 mmol) and phosphorous pentachloride (9.6 g, 46.1 mmol) at 60 C. The reaction mixture was then heated under nitrogen at 80 C. overnight. The resulting dark product mixture was allowed to cool to room temperature and was poured into ice/water. The mixture was extracted with ether and the ether extract was washed with water and brine. After drying over magnesium sulfate, the solvent was removed to leave a dark oil which was subjected to flash chromatography on silica gel eluding with chloroform. Fractions containing only the desired product were combined and concentrated to leave a brown oil (5.0 g, 52%). 1 H NMR (DMSO-d6): delta9.20 (s, 1H), 9.07 (s, 1H).

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, 33252-64-1, 3-Nitro-5-(trifluoromethyl)pyridin-2(1H)-one.

Reference:
Patent; Pfizer Inc; US5811432; (1998); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 78790-79-1, 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.78790-79-1, name is 3-Amino-4-cyanopyridine, molecular formula is C6H5N3, molecular weight is 119.12, as common compound, the synthetic route is as follows.

General procedure: Substrate (1.0 mmol), [HDBN+][TFE-] (6.0 mmol) were loaded in a 10 mL glass reaction tube equipped with a magnetic stirrer. The air in the reactor was replaced by CO2. Then, the reactor was stirred at the desired temperature for 3-96 h under CO2 using a balloon. After the reaction, the reaction liquid was cooled to room temperature and quenched by saturated ammonium chloride solution. Then the mixture was filtered to afford the crude product, which was purified by chromatography (silica gel, methanol/dichloromethane=1/20) to give the desired compound. The purified product was characterized by NMR and HR-MS. 1H NMR and 13C NMR studies were carried out with a JEOL NMR 400 (400 MHz, 100 MHz) spectrometer with DMSO-d6 as the solvent. Mass spectra were recorded with an AMD40223(Interambulacra) spectrometer.

The chemical industry reduces the impact on the environment during synthesis 78790-79-1, I believe this compound will play a more active role in future production and life.

Reference:
Article; Li, Chun; Lu, Xunhua; Yang, Yuanyong; Yang, Shenggang; Zhang, Lin; Tetrahedron Letters; vol. 59; 25; (2018); p. 2463 – 2466;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 13362-26-0, Ethyl 2-aminonicotinate, 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, Product Details of 13362-26-0, blongs to pyridine-derivatives compound. Product Details of 13362-26-0

[0243] To a stirred solution of compound 11(15 g; 90.36 mmol; 1 eq) in dry THF (150 mL) was added NBS (16 g; 90.36 mmol; 1 eq) in portions at 0 C and the resulting mixture was stirred at 23 C for 18 h. The mixture was poured into ice-cold saturated aqueous NaHCO3 solution and the organic components were extracted with ethyl acetate (3 x 200 mL). The combined organic layers were then washed with brine solution, dried over anhydrous sodium sulfate, filtered and evaporated to dryness to afford the title compound (22 g, 100%) as an off white solid. 1H NMR (DMSO-d6) oe 8.29 (d, 1H, J = 3 Hz), 8.12 (d, 1H, J = 2 Hz), 7.31 (s, 2H), 4.29 (q, 2H, J = 7 Hz), 1.30 (t, 3H, J = 7 Hz). LCMS: mlz = 245.0 [M+j, 247.0 [M+21, RT = 3.34 minutes, (Program P1, Column W).

The synthetic route of 13362-26-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ASANA BIOSCIENCES, LLC; THOMPSON, Scott; VENKATESAN, Aranapakam; PRIESTLEY, Tony; KUNDU, Mrinal; SAHA, Ashis; WO2015/95128; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem