Month: April 2022

Application of 131747-41-6, 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 131747-41-6 as follows.

To a mixture of 4-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (1.0 equiv.) and 3-(trifluoromethyl)benzoic acid (1.1 equiv.) in DMF (0.27 M) was added HOAt (1.3 equiv.) and EDC (1.3 equiv.) After 3 h the reaction mixture was diluted with water and then extracted with EtOAc. The organic phase was washed sequentially with 1 M aqueous sodium hydroxide and brine and was then dried over sodium sulfate. The solution was concentrated and dried under vacuo to give N-(4-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-2-(trifluoromethyl)pisonicotinamide in 91% yield. LCMS (m/z) (M+H)=407.1, Rt=1.13 min.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,131747-41-6, its application will become more common.

Reference:
Patent; NOVARTIS AG; Barsanti, Paul A.; Burger, Matthew; Lou, Yan; Nishiguchi, Gisele; Polyakov, Valery; Ramurthy, Savithri; Rico, Alice; Setti, Lina; Smith, Aaron; Taft, Benjamin; Tanner, Huw; DiPesa, Alan; Yusuff, Naeem; US2014/275003; (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. 108118-69-0, name is 2,6-Difluoropyridin-3-amine, the common compound, a new synthetic route is introduced below. category: pyridine-derivatives

To a stirred solution of 1-(4-methoxy-benzyl)-1H-pyrrolo[2,3-6]pyridine-5-carboxylic acid (47 mg, 0.17 mmol) in CH2C12 (2 mL) was added l-chloro-N,N-2-trimethylpropenylamine (45 muL, 0.34 mmol). Following formation of the resulting acid chloride, the reaction mixture was concentrated affording a residue that was dissolved in pyridine (2 mL) before 2,6-difiuoro- pyridin-3-ylamine (20 mg, 0.15 mmol) was added in one portion. After an additional 30 minutes the reaction mixture was concentrated to dryness affording a residue, to which was added DMF (2 mL) and K2CO3 (64 mg, 0.46 mmol). The resulting mixture was heated by microwave to 150 ºC for 10 min, after which the resulting mixture was filtered and concentrated, affording 5- fluoro-2-[ 1 -(4-methoxy-benzyl)-1H-pyrroIo[2,3-b]rhoyridin-5-yl]-oxazolo[5,4-^]pyridine as a crude residue which was subsequently used without further purification. ES MS (M+H+) = 375.

The synthetic route of 108118-69-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MERCK & CO., INC.; WO2009/155017; (2009); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 627501-18-2, 5-Chloro-6-hydroxynicotinaldehyde, 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, Application In Synthesis of 5-Chloro-6-hydroxynicotinaldehyde, blongs to pyridine-derivatives compound. Application In Synthesis of 5-Chloro-6-hydroxynicotinaldehyde

General procedure: Unless otherwise stated, the procedure was as follows. To a 1-dram (4 mL) vial equipped with a magnetic stir bar were added Pd(OAc)2 (4.4 mg, 0.02 mmol), alkene (0.2 mmol), acetic acid (6.0 mg, 0.1 mmol), nucleophile (0.3 mmol), and MeCN (0.1 mL). The vial was sealed with an unpunctured TFE septum-covered screw cap, and placed in a heating block that was pre-heated to 120 C. After the designated reaction time, the dark black reaction was purified either by flash column chromatography only or by flash column chromatography followed by an aqueous workup to produce the desired product.

The synthetic route of 627501-18-2 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Gurak, John A.; Tran, Van T.; Sroda, Miranda M.; Engle, Keary M.; Tetrahedron; vol. 73; 26; (2017); p. 3636 – 3642;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 52538-09-7 , The common heterocyclic compound, 52538-09-7, name is 2,3-Dimethyl-3H-imidazo[4,5-c]pyridine, molecular formula is C8H9N3, 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.

PREPARATION K 3-Methyl-3H-imidazo[4,5-c]pyridine-2-carboxaldehyde Employing the procedure of Example 10B and starting with 774 mg of 2,3-dimethyl-3H-imidazo[4,5-c]pyridine (Preparation J2) and 584 mg of selenium dioxide in 30 ml of dioxane, there was obtained 442 mg of the desired product.

The synthetic route of 52538-09-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Pfizer Inc.; US4782050; (1988); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 69045-83-6 ,Some common heterocyclic compound, 69045-83-6, molecular formula is C6H2Cl5N, 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.

EXAMPLE 7 This Example illustrates the preparation of 2,3-dichloro-5-trifluoromethylpyridine by fluorination of 2,3-dichloro-5-trichloromethylpyridine, using a fluorinating agent alternative to that of Example 6. 2,3-Dichloro-5-trichloromethylpyridine (35 g) was heated with anhydrous hydrogen fluoride (100 g) in an autoclave at 200 for 10 hours with stirring. The cooled reaction mixture was poured on to ice and neutralised with sodium hydroxide at 0. The mixture was extracted with methylene chloride (750 ml). The extracts were washed with water (500 ml), sodium carbonate solution (500 ml) and water (500 ml), dried, and evaporated. The remaining oil was distilled and the fraction of boiling point 77-83/25 Torr was collected and identified as the required pyridine derivative.

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. 69045-83-6, 2,3-Dichloro-5-(trichloromethyl)pyridine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Imperial Chemical Industries Limited; US4317913; (1982); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 89978-52-9, 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 89978-52-9, name is Ethyl 2-bromoisonicotinate. This compound has unique chemical properties. The synthetic route is as follows.

4-cyano-2-naphthaleneboronic acid (0.10 g), 2-bromoisonicotinic acid ethyl ester (0.12 g) and cesium fluoride (0.09 g) in dimethoxyethane (6 mL) was added tetrakis (triphenylphosphine) palladium (0.06 g), and the mixture was stirred at 150C for 40 minutes using microwave reactor (Biotage). The reaction mixture was filtered through a Celite pad, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=100/0-66/34) to give 2-(4-cyanonaphthalene-2-yl) isonicotinic acid ethyl ester (0.14 g). To a solution of this compound (0.14 g) in a mixed solvent of tetrahydrofuran (4 mL), ethanol (1 mL) and water (1 mL) was added lithium hydroxide monohydrate (0.060 g), and the mixture was stirred at room temperature overnight. To the reaction mixture was added acetic acid (0.27 mL). The precipitated solid was collected by filtration, and washed with water and n-hexane. The solid was dried under reduced pressure to give the title compound (0.098g).

According to the analysis of related databases, 89978-52-9, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Kissei Pharmaceutical Co., Ltd.; SHIMIZU, Kazuo; IIZUKA, Masato; FUJIKURA, Hideki; TAKIGAWA, Yasushi; HIRATOCHI, Masahiro; EP2343279; (2011); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 1070892-04-4, 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 1070892-04-4, name is 5-Bromo-2-(trifluoromethyl)isonicotinonitrile. This compound has unique chemical properties. The synthetic route is as follows.

To a mixture of delta-bromo^-trifluoromethyl-isonicotinonitrile 1-1 (2.51 g, 10 mmol) in dioxane (3.3 mL) and water (3.3 ml_), were added 2-chloro-4- methoxyphenylboronic acid (2.3 g, 12.5 mmol) and Na2CO3 (6.3 g). The mixture was purged with nitrogen gas for 10 min, then Pd(PPh3)4 (1.2 g, 1.0 mmol) was added. The mixture was stirred in a sealed vessel at 85 0C for 6 hrs, then extracted by ethyl acetate. The organic layer was washed with water, dried over MgSO4. Concentration and purification by silica gel column chromatography eluting with hexane/ethyl acetate (10/1 ) yielded 5-(2-chloro-4-methoxy-phenyl)-2-trifluoromethylisonicotinonitrile (1.31 g). tR = 2.96 min (method 1).

According to the analysis of related databases, 1070892-04-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; NEUROCRINE BIOSCIENCES, INC.; WO2008/124614; (2008); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 83640-36-2, 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 83640-36-2, name is 6-(Chloromethyl)nicotinonitrile. This compound has unique chemical properties. The synthetic route is as follows.

A. Preparation of 6-((8-bromo-7-(4-chlorophenyl)-3-oxo-[1,2,4]triazolo[4,3-a]pyridin-2(3H)-yl)methyl)nicotinonitrile To a stirred mixture of 8-bromo-7-(4-chlorophenyl)-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one (1.07 g, 3.31 mmol) in DMF (15 mL) at room temperature under argon was added K2CO3 (0.91 g, 6.62 mmol) and 6-(chloromethyl)nicotinonitrile (0.63 g, 4.14 mmol). The mixture was then heated to 60 C. for 7 h, after which HPLC indicated complete reaction. The mixture was cooled to room temperature, diluted with water (100 mL), and stirred for 30 min. Solid was collected by filtration and washed with water (10 mL*5), then methanol (3 mL*3), and finally dried under vacuum. The title compound (0.98 g) was obtained as a tan solid. HPLC/MS: retention time=3.4 min, [M+H]+=442.

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 83640-36-2, 6-(Chloromethyl)nicotinonitrile.

Reference:
Patent; Sun, Chongqing; Sher, Philip M.; Wu, Gang; Ewing, William R.; Huang, Yanting; Lee, Taekyu; Murugesan, Natesan; Sulsky, Richard B.; US2007/4772; (2007); 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. 381247-99-0, name is Methyl 5-bromo-6-hydroxynicotinate. A new synthetic method of this compound is introduced below., SDS of cas: 381247-99-0

Step 1: Methyl 5-bromo-l-methyl–oxo-1,6-dihvdropyridine-3-carboxvlate. A mixture of methyl 5-bromo-6-oxo-l,6-dihydropyridine-3-caboxylate (1.5 g, 6.5 mmol)and potassium carbonate (0.99 g, 7.15 mmol) in DMF (25 mL) was stirred at room temperature for 15 min followed by the addition of methyl iodide (0.42 mL, 6.83 mmol). The resulting suspension was stirred at room temperature for 17 h. The mixture was partitioned between ethylacetate and water. The organic phase was separated and the aqueous phase was extracted with ethylacetate. The organic extracts were combined, washed with brine, dried over MgSO4 and concentrated to afford the title compound as a light yellow solid. MS m/z: 246(M+1).

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, 381247-99-0, Methyl 5-bromo-6-hydroxynicotinate.

Reference:
Patent; AMGEN INC.; WO2007/62007; (2007); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 34486-24-3, 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 34486-24-3 as follows.

To a solution of 6-trifluoromethyl-pyridin-2-ylamine (10.0 g, 62.1 mmol, 1 eq) in CHCI3 (200 mL) was added NBS (12.0 g, 67.4 mmol, 1.08 eq). The solution was stirred in the dark for 2 h, at which time it was added to DCM (200 mL) and 1 N NaOH (200 mL). Upon mixing, the layers were separated and the organic layer was dried and concentrated. The residue was purified by silica gel column (EA/PE = 1/1, v/v) to give 5-bromo-6- trifluoromethyl-pyridin-2-ylamine (6.5 g, 44%) as an orange solid.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,34486-24-3, its application will become more common.

Reference:
Patent; LIFESCI PHARMACEUTICALS, INC; MCDONALD, Andrew; QIAN, Shawn; (100 pag.)WO2017/1926; (2017); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem