Day: September 2, 2021

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 19755-53-4, name is 2-Bromo-3-nitropyridine. This compound has unique chemical properties. The synthetic route is as follows. Application In Synthesis of 2-Bromo-3-nitropyridine

Example 16; 1-(2-(benzo[b]thiophen-2-yl)pyridin-3-yl)-3-(4-(trifluoromethoxy)phenyl)urea; 16a. 2-(benzo[b]thiophen-2-yl)-3-nitropyridine; To a solution of 2-bromo-3-nitropyridine (75 mg, 0.371 mmol) in DME (3 mL) was added benzofuran boronic acid (132 mg, 0.802 mmol), followed by Pd(PPh3)4 (35 mg, 0.03 mmol) and K2CO3 (145 mg, 1.05 mmol). The reaction mixture was stirred at 80 C. for 16 h. The mixture was filtered and washed with CH2Cl2 (10 mL). The solvent was evaporated under reduced pressure and purified by column chromatography using 0 to 80% EtOAc in hexane over 40 min as eluting gradient to afford 16a (38 mg, 40%) as a yellowish powder. MS (ES) m/z 257 [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, 19755-53-4, 2-Bromo-3-nitropyridine.

Reference:
Patent; Bristol-Myers Squibb Company; US2006/293336; (2006); 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. 85838-94-4, name is tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate, molecular formula is C10H17NO2, 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. HPLC of Formula: C10H17NO2

To a solution of tert-butyl5,6-dihydropyridine-1(2H)-carboxylate (0.3627 g, 1.979 mmol) in CH2Ch (5 ml) at ooc was5 added a solution of mCPBA (0.53 g, 3.07 mmol) in CH2Cb (5 ml). The resulting reactionmixture was allowed to warm to rt and stirred over the weekend. The reaction was partitionedbetween EtOAc and 5% Na2S20 3. After separation of layers, the organic layer was washed withsat. NaHC03. brine, dried over anhydrous MgS0 4, filtered and concentrated to give the titlecompound as colorless oil.

With the rapid development of chemical substances, we look forward to future research findings about 85838-94-4.

Reference:
Patent; MERCK SHARP & DOHME CORP.; CHOBANIAN, Harry; PIO, Barbara; GUO, Yan; DING, Fa-Xiang; DONG, Shuzhi; WALSH, Shawn, P.; JIANG, Jinlong; KIM, Dooseop; WO2015/95097; (2015); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 6959-47-3, 2-(Chloromethyl)pyridine hydrochloride, 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, Recommanded Product: 2-(Chloromethyl)pyridine hydrochloride, blongs to pyridine-derivatives compound. Recommanded Product: 2-(Chloromethyl)pyridine hydrochloride

The ligand L1 was synthesized via previously reported procedure[23]. A solution of potassium carbonate (2.55 g, 18.45 mmol)in 10 mL water was dropwise added to the aqueous solution of 2-(chloromethyl)-pyridine hydrochloride (1.5 g, 9.15 mmol in10 mL). After about 30 min. of stirring at room temperature, thereaction mixture was extracted with dichloromethane(3 20 mL). The combined organic extracts were dried over anhydroussodium sulfate. The solution was filtered and the solvent wasremoved under vacuum. The resulted residue was then dissolvedin dichloromethane (10 mL). The dichloromethane solution of 2-chloromethyl-pyridine was added dropwise to a solution of N,N0-dimethylethylenediamine (0.471 mL, 5.34 mmol) in dichloromethane(15 mL). After this addition, 10 mL of aqueous sodiumhydroxide (1 M) was added slowly and the reaction mixture wasstirred for next 60 h at room temperature. After stirring was finished,another fraction of sodium hydroxide (10 mL, 1 M) wasadded rapidly. The reaction mixture was extracted with dichloromethane(3 25 mL) and combined organic portion was dried overanhydrous sodium sulfate. Evaporation of solvent led to isolationof the ligand L1 as a dark orange oil. (1.13 g, Yield 79%) 1H NMR(500 MHz, Methanol-d4) d 7.27 (m, 2H, pyridine ring), 7.50 (d,2H, pyridine ring), 7.76 (m, 2H, pyridine ring), 8.45 (d, 2H, pyridinering), 3.68 (s, 4H, -N-CH2-Py), 2.63 (s, 4H, -CH2-CH2-), 2.26 (s, 6H,N-CH3). IR (cm1): 2945, 2789, 1589, 1569, 1472, 1432, 1360,1304, 1146, 1090, 1031, 994, 635, 614, 418.

The synthetic route of 6959-47-3 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Singh, Nirupama; Niklas, Jens; Poluektov, Oleg; Van Heuvelen, Katherine M.; Mukherjee, Anusree; Inorganica Chimica Acta; vol. 455; (2017); p. 221 – 230;,
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. 62150-45-2, name is 4-Bromopyridine-2-carbonitrile. A new synthetic method of this compound is introduced below., Application In Synthesis of 4-Bromopyridine-2-carbonitrile

Step 1. 5-Chloro-3,4′-bipyridine-2-carbonitrile A degassed mixture of 4-bromopyridine-2-carbonitrile (0.99 g, 5.4 mmol, Synthonix), (5-chloropyridin-3-yl)boronic acid (0.847 g, 5.38 mmol, Aldrich), CsF (2.4 g, 16 mmol), and 4-(di-tert-butylphosphino)-N,N-dimethylaniline-dichloropalladium (2:1) (0.38 g, 0.54 mmol, Aldrich) in 1,4-dioxane (10 mL) and water (3 mL) was heated to 90-105° C. for 2.5 hours. The reaction mixture was filtered and the volume was reduced via rotary evaporation. The mixture was diluted with water and extracted with EtOAc. The combined organic extracts were washed sequentially with water and brine, dried over sodium sulfate, filtered, and concentrated. The resulting solid was triturated with MTBE (5 mL). The solid product was isolated by filtration and air dried. Yield: 0.95 g, 82percent. LCMS (M+H)+: 216.0/218.0.

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, 62150-45-2, 4-Bromopyridine-2-carbonitrile.

Reference:
Patent; Incyte Corporation; Sparks, Richard B.; Shepard, Stacey; Combs, Andrew P.; Buesking, Andrew W.; Shao, Lixin; Wang, Haisheng; Falahatpisheh, Nikoo; (158 pag.)US2017/190689; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 504-24-5, name is 4-Aminopyridine. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C5H6N2

Example 25A 2,2-dimethyl-N-pyridin-4-ylpropanamide A mixture of 4-aminopyridine (10 g, 106 mmol) and pivaloyl chloride (12.9 g, 107 mmol) in 200 mL dichloromethane was cooled to 0 C. and treated slowly with triethylamine (10.9 g, 108 mmol), warmed to room temperature, stirred overnight, and diluted with water. The aqueous layer was extracted three times with dichloromethane and the combined extracts were washed with brine, dried (Na2SO4), filtered, and concentrated. The product was recrystallized from toluene to provide the desired product (14 g, 74%).

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, 504-24-5, 4-Aminopyridine.

Reference:
Patent; Li, Qun; Woods, Keith W.; Zhu, Gui-Dong; Fischer, John P.; Gong, Jianchun; Li, Tongmei; Gandhi, Virajkumar; Thomas, Sheela A.; Packard, Garrick K.; Song, Xiaohong; Abrams, Jason N.; Diebold, Robert B.; Dinges, Jurgen; Hutchins, Charles W.; Stoll, Vincent S.; Rosenberg, Saul H.; Giranda, Vincent L.; US2003/199511; (2003); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 1206977-80-1, 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 1206977-80-1 as follows.

[0098] As shown in step 3-ii of Scheme 3, an excess of sodium metal was dissolved into 20 mL anhydrous methanol and 2-chloro-3-(difluoromethoxy)pyridine (2.O g, 11.1 mmol ) in anhydrous methanol was added. The reaction mixture was stirred in a sealed vessel at 1000C for 6 hours. The volatiles were removed under reduced pressure and the residue was partitioned between EtOAc and brine. The brine was extracted with EtOAc and the combined organics were dried over Na2SO4, filtered, and the volatiles removed under reduced pressure. The product was purified by silica gel chromatography (DCM) to yield 3-(difluoromethoxy)- 2-methoxypyridine as a colorless oil (Compound 1007, 1.1 g, 56% yield: ESMS (M+H) 176.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1206977-80-1, its application will become more common.

Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; ARONOV, Alex; BANDARAGE, Upul, Keerthi; COTTRELL, Kevin; DAVIES, Robert; KRUEGER, Elaine; LEDEBOER, Mark; LEDFORD, Brian; LE TIRAN, Arnaud; LIAO, Yusheng; MESSERSMITH, David; WANG, Tiansheng; XU, Jinwang; WO2010/96389; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 120277-69-2, 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. 120277-69-2, name is 3-Bromo-5-(chloromethyl)pyridine. A new synthetic method of this compound is introduced below.

To a suspension of sodium hydride (60% in mineral oil, 0.044 g, 1.09 mmol) in DMF (2 mL) was added pyrrolidin-2-one (0.081 g, 0.945 mmol) and the reaction mixture was stirred at room temperature for 20 min. Then, 3-bromo-5-chloromethyl-pyridine (0.15 g, 0.727 mmol) was added and the resulting suspension was heated at 60 C. over night. The mixture was quenched with water (2 mL) and extracted with EtOAc (2×10 mL). Combined organics were dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by silica gel flash chromatography eluting with a 0 to 5% MeOH-DCM gradient to give the title compound (0.217 g, 87%) as a white solid. MS: 251.1, 257.1 (M+H+)

At the same time, in my other blogs, there are other synthetic methods of this type of compound,120277-69-2, 3-Bromo-5-(chloromethyl)pyridine, and friends who are interested can also refer to it.

Reference:
Patent; Aebi, Johannes; Amrein, Kurt; Hornsperger, Benoit; Knust, Henner; Kuhn, Bernd; Liu, Yongfu; Maerki, Hans P.; Mayweg, Alexander V.; Mohr, Peter; Tan, Xuefei; Zhou, Mingwei; US2013/72679; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 14150-94-8, 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 14150-94-8, name is 1-Methyl-3,5-dinitro-1H-pyridin-2-one. This compound has unique chemical properties. The synthetic route is as follows.

General procedure: To a solution of the dinitropyridone 1 (50 mg, 0.25 mmol) in ethanol (10 mL), 4-phenyl-3-buten-2-one (4a) (36.5 mg, 0.25 mmol) and NH4OAc (578 mg, 7.5 mmol) were added, and the resultant mixture was heated at 65 C for 24 h. After removal of the solvent, the residue was washed with benzene (3 × 10 mL) to remove unreacted ketone 4a and treated with column chromatography on silica gel (eluent: hexane/ethyl acetate =95/5) to afford 5-nitro-2-(2-phenylethenyl)pyridine (5a) (41 mg, 0.18 mmol, 72%) as a yellow powder. The reactions of the dinitropyridone 1 with other ketones 4b-f or 10a-c were performed in a similar way.

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 14150-94-8, 1-Methyl-3,5-dinitro-1H-pyridin-2-one.

Reference:
Article; Le, Song Thi; Asahara, Haruyasu; Nishiwaki, Nagatoshi; Chemistry Letters; vol. 44; 6; (2015); p. 776 – 778;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 68325-15-5 ,Some common heterocyclic compound, 68325-15-5, molecular formula is C6H3ClN2, 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.

To a solution of (lR,3s,5S)-tert-butyl 3-((lr,4R)-4-hydroxycyclohexyloxy)-8- azabicyclo[3.2.1]octane-8-carboxylate (20 mg, 0.061 mmol) in THF (0.615 mL) was added 1M potassium teri-butoxide in THF (73.75 mu?, 73.75 muiotaetaomicron?) was added 3-chloroisonicotinonitrile (10.22 mg, 73.75 muiotaetaomicron?) at room temperature . The reaction mixture was stirred for 16 h and then concentrated. The residue was purified by TLC (silica gel, 50% EtOAc/hexanes) to give the title compound (14.1 mg, 0.033 mmol, 53.7% yield). Exact mass calculated for C24H33N3O4: 427.3, found LCMS m/z = 428.4 [M+H]+; ‘ll NMR (CDCI3 , 400 MHz) delta ppm 1.44-1.75 (m, 8H), 1.47 (s, 9H), 1.87-2.03 (m, 6H), 2.09-2.16 (m, 2H), 3.51-3.58 (m, IH), 3.78-3.87 (m, IH), 4.15-4.33 (m, 2H), 4.57-4.63 (m, IH), 7.45 (d, = 5.0 Hz, IH), 8.32 (d, = 5.0 Hz, IH), 8.47 (s, IH).

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. 68325-15-5, 3-Chloro-4-cyanopyridine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ARENA PHARMACEUTICALS, INC.; JONES, Robert M.; BUZARD, Daniel J.; HAN, Sangdon; KIM, Sun Hee; LEHMANN, Juerg; ZHU, Xiuwen; WO2013/55910; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 24484-93-3, Adding some certain compound to certain chemical reactions, such as: 24484-93-3, name is Methyl 4-chloropicolinate,molecular formula is C7H6ClNO2, 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 24484-93-3.

Preparation of 4-chloro-N-(methyl-d3)picolinamide A2 To a three-necked bottom flask with tetrahydrofuran (250 mL), methyl 4-chloro-2-picolinate (50 g, 291 mmol, 1 eq) was added. N-(methyl-d3)amine hydrochloride (31 g, 437 mmol, 1.5 eq) and anhydrous potassium carbonate(400-mesh, 80 g, 583 mmol, 2 eq) were added with stirring. After the mixture was stirred at room temperature for 20 h, water (250 mL) and methyl tert-butyl ether (150 mL) were added. The mixture was stirred and separated. The aqueous layer was extracted with methyl tert-butyl ether (100 mL). The organic phases were combined, dried over anhydrous sodium sulfate and filtered. The solvent in the filtrate was removed under reduced pressure to obtain the product (48 g, purity 99%, yield 96%) as light yellow liquid. 1H NMR(DMSO-d6, 400 MHz): delta7.64(dd, J = 2Hz, 5.2Hz, 1H), 7.97(d, J = 1.6Hz, 1H), 8.54(d, J = 5.2Hz, 1H), 8.74(br, 1H). MS (ESI, m/z) calcd. for C7H4D3ClN2O: 173, found : 174 [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. 24484-93-3, Methyl 4-chloropicolinate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Suzhou Zelgen Biopharmaceutical Co., Ltd.; FENG, Weidong; GAO, Xiaoyong; DAI, Xiaojun; EP2548867; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem