Pyridine-derivatives

Adding a certain compound to certain chemical reactions, such as: 59105-50-9, (5-Bromopyridin-3-yl)(phenyl)methanone, 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: C12H8BrNO, blongs to pyridine-derivatives compound. Formula: C12H8BrNO

PdCl2(PPh3)2 (148 mg, 0.21 mmol) and CuI (120.6 mg, 0.63 mmol) were added to asolution of (5-bromopyridin-3-yl)(phenyl)methanone (1.1 g, 4.22 mmol) in Et3N (10 mL)under N2, and the resulting mixture was stirred for 30 min. Then ethynylbenzene (516 mg, 5.1mmol) was added dropwise and the reaction mixture was stirred overnight at roomtemperature, followed by filtration over Celite and evaporation under vacuum. Purificationby column chromatography on silica gel afforded the desired product.To the crude product in a mixture of THF (12 mL) and MeOH (12 mL) was added 10% Pdon carbon (80 mg), and the atmosphere was changed to H2 (2.5 bar). The resulting mixturewas stirred in a Parr hydrogenation apparatus overnight at room temperature, followed byfiltration over Celite and evaporation under vacuum. Purification by column chromatographyon silica gel afforded the desired product.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,59105-50-9, (5-Bromopyridin-3-yl)(phenyl)methanone, and friends who are interested can also refer to it.

Reference:
Article; Fu, Yun; Sun, Jian; Molecules; vol. 24; 3; (2019);,
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 23628-31-1, name is 6-Aminopicolinic acid. This compound has unique chemical properties. The synthetic route is as follows. Recommanded Product: 23628-31-1

(3) Ethyl 6-aminopyridine-2-carboxylate 6-Aminopyridine-2-carboxylic acid (5.1 g) was dissolved in ethanol (100 mL). Concentrated sulfuric acid (4 mL) was added and the mixture was heated under reflux for 23 hours. The reaction mixture was cooled to room temperature, and then the solvent was evaporated under reduced pressure. Water was added to the residue, followed by neutralization with a saturated sodium bicarbonate solution under ice-cooling. The reaction mixture was extracted with chloroform twice. The organic layers were washed with a saturated sodium chloride solution and dried over magnesium sulfate. The drying agent was removed by filtration and then the solvent was evaporated under reduced pressure. The title compound (4.75 g) was obtained as a residue. 1H-NMR (400 MHz, CDCl3) delta(ppm): 1.41 (t, J=7.2 Hz, 3H), 4.43 (q, J=7.2 Hz, 2H), 4.68 (br s, 2H), 6.65 (dd, J=1.2 Hz, 8.0 Hz, 1H), 7.47 (dd, J=1.2 Hz, 7.2 Hz, 1H), 7.53 (dd, J=7.2 Hz, 8.0 Hz, 1H).

With the rapid development of chemical substances, we look forward to future research findings about 23628-31-1.

Reference:
Patent; Eisai R&D Management Co., Ltd.; EP2017275; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 67058-71-3, 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 67058-71-3 as follows.

To a suspension of NaH (60 % in mineral oil, 90 mg, 2.25 mmol) in DMF (4.2 mL) cooled at 0C was added a solution of 1-(1 H-pyrrolo[2,3-c]pyridin-3-yl)-ethanone (prepared according to J. Org. Chem. 2002, 67, 6226) (300 mg, 1.87 mmol) in DMF (4.2 mL) and the resulting suspension was stirred at 0C under nitrogen atmosphere for 30 min before slow addition of tert-butyl bromoacetate (277 mu, 1.87 mmol). The reaction mixture was allowed to reach RT and further stirred at RT for 1.5 h. After completion of the reaction, the mixture was purified first by catch-release on SiliaPrep Tosic Acid-(2×10 g) (Varian) (eluent: MeOH (50 mL) by 2 M ammonia in MeOH (50 mL)) to give a mixture of regioisomers: (3-acetyl-pyrrolo[2,3-c]pyridin- 1-yl)-acetic acid tert-butyl ester and (3-acetyl-pyrrolo[2,3-c]pyridin-6-yl)-acetic acid tert-butyl ester followed by flash column chromatography on silica gel (CH2CI2 to CH2CI2/MeOH 85-15) to give (3-acetyl-pyrrolo[2,3-c]pyridin-1-yl)-acetic acid tert-butyl ester as a yellow powder. TLC, Rf (CH2CI2/ MeOH 9-1) = 0.50; MS (UPLC/MS): 275.3 [M+H]+, 319.2 [M+HCOO]-; tR (HPLC conditions f): 1.28 min; 1 H-NMR (400 MHz, DMSO-d6): delta (ppm): 8.88 (s, 1 H), 8.50 (s, 1 H), 8.33 (d, 1 H), 8.06 (d, 1 H), 5.27 (s, 2H), 2.48 (s,3H), 1.45 (s, 9H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,67058-71-3, its application will become more common.

Reference:
Patent; NOVARTIS AG; ALTMANN, Eva; HOMMEL, Ulrich; LORTHIOIS, Edwige Liliane Jeanne; MAIBAUM, Juergen Klaus; OSTERMANN, Nils; QUANCARD, Jean; RANDL, Stefan Andreas; SIMIC, Oliver; VULPETTI, Anna; ROGEL, Olivier; WO2012/93101; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 955372-86-8 ,Some common heterocyclic compound, 955372-86-8, molecular formula is C6H3BrFNO2, 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.

I ntermediate 7: 3-Bromo-5-( 2-ftuoro-phenylamino)-isonicotinic acid; Lithium bis(trimethylsilyl)amide (54.6 ml_, 1.0 M in THF, 54.6 mmol) was added to a solution of 2-fluoro aniline (3.5 mL, 36.4 mmol) in THF (100 ml_) at -78 0C. The resulting solution was for 1 h at -780C. S-Bromo-delta-fluoro-isonicotinic acid (1) (4.0 g, 18.2 mmol) was added as a solid, and the reaction solution was stirred for 48 h at room temperature. The reaction solution was concentrated via rotary evaporation; diluted with satd. NaHCO3, and washed with EtOAc. The aqueous solution was acidified with concentrated HCI. The resulting precipitate was filtered, washed with H2O, and dried under vacuum to afford the desired product (4.2 g, 74%) as a yellow solid.

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. 955372-86-8, 3-Bromo-5-fluoroisonicotinic acid, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; APPLIED RESEARCH SYSTEMS ARS HOLDING N.V.; WO2007/123936; (2007); 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. 75806-86-9, name is 2-Bromo-5-chloro-3-nitropyridine, the common compound, a new synthetic route is introduced below. Product Details of 75806-86-9

Example 2: 2-Bromo-5-chloro-pyridin-3-ylamine; [00382] 2-Bromo-5-chloro-3-nitro-pyridine (11.87 g, 50 mmol) was dissolved in 100 mL ether. Tin(ll) chloride dihydrate (56.4g, 0.5 mol) was dissolved in 100 mL of concentrated hydrochloric acid and added drop wise over 15 minutes to the stirring ethereal solution of the nitro compound. The exothermic reaction brought the ether to boiling and it was allowed to evaporate off. After the addition was complete the reaction mixture was placed on a 50 C oil bath and stirred for 30 minutes to boil of the remaining ether. The flask was then cooled on in an ice bath. The precipitate formed was collected and by filtration and dissolved in 100 mL of water. The pH was adjusted to 9-10 by the addition of concentrated ammonium hydroxide solution and the product was extracted with ethyl acetate (2 x 100 mL). The organic layer was washed with diluted ammonium hydroxide, water and brine and dried over Na2SU4 and the solvent was evaporated to afford 7.4 g of tan crystalline solid. MS m/z : 208.9 (M+H).

The synthetic route of 75806-86-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; CHEMOCENTRYX, INC.; WO2006/76644; (2006); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 920966-03-6 ,Some common heterocyclic compound, 920966-03-6, molecular formula is C8H5ClN2O2, 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 compound 4-chloro-1H-pyrrolo[2,3-b]pyridine-5-carboxylic acid 11a (1.00 g, 5.10 mmol) and DMF (10 mL) were added to the reaction flask, was added CDI (0.91g, 5.61mmol), stirred at room temperature for 1 hour and ice-water bath, followed by addition of NH3.H2O (1.12mL) at 0 C, stirred at room temperature for 1 hour. TLC monitored the reaction was complete, the system was poured into water, extracted three times with ethyl acetate, washed with water, and the combined organic phases were washed with brine, dried over anhydrous sodium sulfate, and concentrated, dichloromethane / petroleum ether = 5ml / 1ml beating, suction filtration, dried under reduced pressure using a rotary evaporator to give the title compound 11b (0.6g, 3.08mmol), in a yield of 60.3%

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,920966-03-6, its application will become more common.

Reference:
Patent; Shanghai Huahuituo Pharmaceutical Technology Co., Ltd.; Zhejiang Huahai Pharmaceutical Co., Ltd.; Xu Xin; Zhang Tian; Li Yunfei; Wang Guan; Zhu Weibo; Li Qiang; Qu Minkai; Zhang Linli; Song Jinqian; Liu Lei; Chen Haiji; Liu Qiang; Wang Yijin; Ge Jian; (67 pag.)CN109535164; (2019); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 850663-54-6, 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. 850663-54-6, name is 4-Chloro-5-nitropyridin-2(1H)-one. A new synthetic method of this compound is introduced below.

Into a 250 mL 3 -necked round-bottom flask purged and maintained with nitrogen was added a solution of 4-chloro-5-nitropyridin-2-ol (1 1.5 g, 65.9 mmol) in CH3CN (1 10 mL), followed by addition of POBr3 (23.1 g). The resulting solution was stirred at 80 C for 2 hours. The solids were filtered out and the filtrate was concentrated under vacuum. The residue was suspended in 500 mL of ice water. The resulting solids were collected by filtration and dried under vacuum to afford 2,4- dibromo-5-nitropyridine (7.66 g, 41.1%) as a light yellow solid, which was carried forward without purification.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,850663-54-6, its application will become more common.

Reference:
Patent; GENENTECH, INC.; BRYAN, Marian C.; CHAN, Bryan; HANAN, Emily; HEFFRON, Timothy; PURKEY, Hans; ELLIOTT, Richard Leonard; HEALD, Robert; KNIGHT, Jamie; LAINCHBURY, Michael; SEWARD, Eileen M.; WO2014/81718; (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. 53710-18-2, name is 3,5-Diiodopyridine, molecular formula is C5H3I2N, 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. Recommanded Product: 3,5-Diiodopyridine

In a 75-mL sealed tube, 3,5-diiodo-pyridine (intermediate A-5, 6.6 g, 20 mmol), 5-chloro- 3,3-dimethyl-2,3-dihydro-isoindol-1-one (intermediate A-3, 1.95 g, 10 mmol), CuT (571 mg, 3 mmol), K3P04 (4.24 g, 20 mmol) and (+)-(S,S)-1,2-diaminocyclohexane (0.7 mL, 6 mmol) were dissolved in 20 mL of dioxane. The resulting reaction mixture was heated at120C for 3 hours before it was poured into water (50 mL) and extracted with EtOAc (2 x125 mL). The combined organic layers were washed with brine, dried over anhy. Na2SO4, filtered and concentrated in vacuo to give a crude product, which was purified by silica gel flash chromatography (0-30% EtOAc-hexane gradient) to yield the title compound (1.8 g, 45%) as a light yellow solid. MS: 399.2 (M+H).

With the rapid development of chemical substances, we look forward to future research findings about 53710-18-2.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; AEBI, Johannes; AMREIN, Kurt; CHEN, Wenming; HORNSPERGER, Benoit; KUHN, Bernd; LIU, Yongfu; MAERKI, Hans P.; MARTIN, Rainer E.; MAYWEG, Alexander V.; TAN, Xuefei; WANG, Lisha; ZHOU, Mingwei; WO2014/191338; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1142363-52-7, 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. 1142363-52-7, name is JNJ-40346527. A new synthetic method of this compound is introduced below.

Example 24 4-Cyano-1H-imidazole-2-carboxylic acid[2-(4,4-dimethyl-cyclohex-1-enyl)-6-(2,2,6,6-tetramethyl-tetrahydro-pyran-4-yl)-pyridin-3-yl]-amide methanesulfonic acid salt A solution of 4-cyano-1H-imidazole-2-carboxylic acid[2-(4,4-dimethyl-cyclohex-1-enyl)-6-(2,2,6,6-tetramethyl-tetrahydro-pyran-4-yl)-pyridin-3-yl]-amide (50.0 mg, 0.108 mmol, as prepared in Example 15, step (h)) in EtOH (2 mL) was treated with methanesulfonic acid (7.0 muL, 0.108 mmol) at room temperature for 1 h. The solvents were evaporated in vacuo, and the residue was dried under high vacuum overnight. The solid was dissolved in a minimum amount of EtOH (2 mL) with sonication and heating. While warm, the solution was slowly treated with hexanes (3 mL) to the cloud point. The mixture was heated again until clear, the sides of the vial were scratched, and the mixture was allowed to cool. The solid was filtered and air-dried to afford the title compound (24 mg, 40%) as white crystals. Mass spectrum (APCI, m/z): Calcd. for C27H35N5O2, 462.3 (M+H), found 462.3.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1142363-52-7, JNJ-40346527, and friends who are interested can also refer to it.

Reference:
Patent; Illig, Carl R.; Chen, Jinsheng; Meegalia, Sanath K.; Wall, Mark J.; US2009/105296; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 1083057-12-8, 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 1083057-12-8, name is tert-Butyl 3-(3-methylpyridin-2-yl)benzoate. This compound has unique chemical properties. The synthetic route is as follows.

tert-Butyl-3-(3-methylpyridin-2-yl)benzoate (1 .0 eq) was dissolved in EtOAc (6 vol).Water (0. 3 vol) was added, followed by urea-hydrogen peroxide (3 eq). Phthalic anhydride (3eq) was then added portionwise to the mixture as a solid at a rate to maintain the temperature inthe reactor below 45 “C. After completion of the phthalic anhydride addition, the mixture washeated to 45 oc After stirring for an additional 4 hours, the heat was turned off. 10% w/waqueous Na2S03 (1.5 eq) was added via addition funnel. After completion ofNa2S03 addition,the mixture was stirred for an additional 30 min and the layers separated. The organic layer wasstirred and 10% vtlwt aqueous. Na2C03 (2 eq) was added. After stirring for 30 minutes, thelayers were allowed to separate. The organic phase was washed 13% w/v aq NaCl. The organicphase was then filtered and concentrated to afford crude 2-(3-(tert-butoxycarbonyl)phenyl)-3-methylpyridine-1-oxide (95%) that was used directly in the next step.

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 1083057-12-8, tert-Butyl 3-(3-methylpyridin-2-yl)benzoate.

Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; VAN GOOR, Fredrick, F.; WO2013/185112; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem