Category: pyridine-derivatives

Related Products 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 (15.0 g, 56.8 mmol), prepared as described in (US 5,733,912), and 30% HBr/acetic acid (200 mL) were stirred at ambient temperature for 16 hours. The reaction was diluted with diethyl ether (500 mL) and the resulting white solid (12.9 g) was isolated by filtration. The solid was taken up in methanol (300 mL) and concentrated NH4OH (50 mL) was added. After stirring at ambient temperature for 12 hours, the mixture was concentrated under reduced pressure to provide the title compound as a white solid (9.8 g, 89%). MS (DCI/NH3) m/z 174/176 (M+H)+.

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; ABBOTT LABORATORIES; EP1428824; (2004); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 6443-85-2, 2-(Pyridin-3-yl)acetonitrile, 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, 6443-85-2, blongs to pyridine-derivatives compound. Quality Control of 2-(Pyridin-3-yl)acetonitrile

b) 2-(3-pyridyl)ethylamine dihydrochloride was prepared as follows. A mixture of 1.3 g 3-pyridylacetonitrile, approximately 3 g Raney nickel and 30 ml methanol containing 10% ammonia by volume was hydrogenated at 35 psi for 20 hr using a Parr hydrogenator. The catalyst was filtered off over celite and the filtrate was evaporated. The residue was dissolved in methylene chloride, dried with magnesium sulfate, filtered and evaporated. The product was converted to the dihydrochloride using hydrogen chloride in dioxane. Crystallization from methanol/ether gave 1.4 g colorless crystals having a mp 145-148 C.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,6443-85-2, its application will become more common.

Reference:
Patent; Aventis Pharmaceuticals Inc.; US6759384; (2004); B1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 74784-70-6 ,Some common heterocyclic compound, 74784-70-6, molecular formula is C6H5F3N2, 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 l-(2,4-dichlorophenyl)-5-(4-methoxyphenyl)-4-methyl-iH-pyrazole-3- carboxylic acid (1.00 g, 2.65 mmol) in DCM (20 ml) was added 5 drops of DMF followed by 5 ml oxalyl chloride. The reaction mixture was stirred for one hour at room temperature, concentrated and the crude acid chloride redissolved in DCM (20 ml). DMAP (0.98 g, 8.03 mmol) was added followed by 5-(trifluoromethyl)pyridine-2-amine (0.49 g, 3 mmol). The reaction mixture was stirred at room temperature overnight then water was added and the product extracted with DCM (x2). The combined organic extracts were dried (Na2SO4), filtered and concentrated. Flash chromatography (heptane – heptane : EtOAc 90 : 10) gave 0.67 g (49%) of the title compound as a colorless 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. 74784-70-6, 5-(Trifluoromethyl)pyridin-2-amine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/67443; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 98273-19-9, 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.98273-19-9, name is Methyl 4,6-dichloropicolinate, molecular formula is C7H5Cl2NO2, molecular weight is 206.03, as common compound, the synthetic route is as follows.

Methyl 4-chloro-6- and methyl 6-chloro-4-morpholinopicolinateA screw-cap vial was charged with methyl 4,6-dichloropicolinate (0.300 g, 1.456 mmol), potassium carbonate (0.302 g, 2.184 mmol), palladium (II) acetate (0.016 g, 0.073 mmol), XPhos (0.104 g, 0.22 mmol), morpholine (0.127 mL, 1.46 mmol), and toluene (5 mL). The yellow solution was stirred at 100 C for 18 h, then filtered through Celite and concentrated. The crude material was purified by column chromatography (silica, 0-50% ethyl acetate in hexanes) to afford (in order of elution) methyl 4-chloro-6-morpholinopicolinate and methyl 6-chloro-4- morpholinopicolinate as white amorphous solids. Isomers assigned by NOESY. Mass Spectrum (ESI) m/e = 257.0 (M + 1); 257.0 (M + 1).

Statistics shows that 98273-19-9 is playing an increasingly important role. we look forward to future research findings about Methyl 4,6-dichloropicolinate.

Reference:
Patent; AMGEN INC.; DRANSFIELD, Paul John; GONZALEZ LOPEZ DE TURISO, Felix; PATTAROPONG, Vatee; SIMARD, Jillian L.; WO2012/3264; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 884494-37-5, 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 884494-37-5, name is 2-Bromo-3-fluoro-4-picoline. This compound has unique chemical properties. The synthetic route is as follows.

[00415] Intermediate 44A. Methyl l-(3-fluoro-4-methylpyridin-2-yl)-lH-imidazole-4- carboxylate: A suspension of methyl lH-imidazole-4-carboxylate (83 mg, 0.658 mmol), 2-bromo-3-fluoro-4-methylpyridine (200 mg, 1.053 mmol), copper (I) iodide (125 mg, 0.658 mmol) and potassium carbonate (546 mg, 3.95 mmol) in DMSO (2 mL) was heated at 120 for 90 min under microwave conditions. The reaction mixture was quenched with H20, and the solid was suspended in EtOAc and MeOH. The combined organic layer was concentrated in vacuo, yielding oily residue, which was purified by reverse phase HPLC to give the desired product (5 mg, 3%). MS(ESI) m/z: 236.1 (M+H)+.

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 884494-37-5, 2-Bromo-3-fluoro-4-picoline.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; PINTO, Donald J.; CORTE, James R.; GILLIGAN, Paul J.; FANG, Tianan; SMITH II, Leon M.; WANG, Yufeng; YANG, Wu; EWING, William R.; WO2013/22818; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1822-51-1, Adding some certain compound to certain chemical reactions, such as: 1822-51-1, name is 4-(Chloromethyl)pyridine hydrochloride,molecular formula is C6H7Cl2N, 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 1822-51-1.

A mixture of 4-hydroxylbenzaldehyde (2a) (1.2 g, 10 mmol), 4-(chloromethyl)pyridine hydrochloride (1.6 g, 10 mmol) and K2CO3 (4.2 g, 30 mmol) in dry DMF (12 mL) was stirred at 80 for 7 h. The cooled mixture was extracted with EtOAc (100 mL). The organic layer was washed with brine (2 × 100 mL) , dried (MgSO4) and concentrated to dryness. Yield = 1.3 g (61 %), tan crystals, recrystallised with methanol. m. p. = 102 – 104 (Lit. m. p. 57 – 58 ). TLC: petroleum ether-EtOAc 1: 3 v/v, Rf = 0.24 .1H NMR (DMSO-d6): delta 9.89 (s, 1H, CHO), 8.60 (dd, J = 1.6, 4.5 Hz, 2H, Ar), 7.91 (m, 2H, Ar), 7.47 (d, J = 6.3 Hz, 2H, Ar), 7.22 (dd, J = 1.8, 7Hz, 2H, Ar), 5.33 (s, 2H, CH2).

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. 1822-51-1, 4-(Chloromethyl)pyridine hydrochloride, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Taban, Ismail M.; Zhu, Jinge; DeLuca, Hector F.; Simons, Claire; Bioorganic and Medicinal Chemistry; vol. 25; 20; (2017); p. 5629 – 5636;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 67515-76-8, Adding some certain compound to certain chemical reactions, such as: 67515-76-8, name is Methyl 5-aminopicolinate,molecular formula is C7H8N2O2, 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 67515-76-8.

Reference Example 17 Methyl 5-(tert-butoxycarbonylamino)-6-iodopyridine-2-carboxylate A mixture of methyl 5-aminopyridine-2-carboxylate (2.92 g), iodine (3.9 g) and sodium periodate (1.64 g) in N,N-dimethylformamide (24 mL) was stirred at 60C for 2 days. The reaction mixture was cooled to room temperature. To the reaction mixture was added 10% aqueous sodium sulfite solution, and the resulting mixture was stirred for 10 minutes. The crystals were collected by filtration. The collected crystals were washed with water, and dried under reduced pressure to give methyl 5-amino-6-iodopyridine-2-carboxylate (3.26 g). To sodium hexamethyldisilazide (1.03 mol/L tetrahydrofuran solution, 7.68 mL) was added a solution of methyl 5-amino-6-iodopyridine-2-carboxylate (1 g) in tetrahydrofuran (5 mL) in a dropwise manner at -14C, and the mixture was stirred at the same temperature for 10 minutes. To the mixture was added a solution of di(tert-butyl)dicarbonate (0.82 g) in tetrahydrofuran (3 mL) in a dropwise manner, and the mixture was stirred at the same temperature for 30 minutes. To the reaction mixture was added 1 mol/L hydrochloric acid (13.6 mL), and the resulting mixture was extracted with ethyl acetate. The extract was washed with water and brine, and dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. To the residue were added 2-propanol (2.8 mL) and water (3.4 mL), and the mixture was stirred at 80C for 30 minutes, and then stirred at room temperature for 30 minutes. The crystals were collected by filtration. The collected crystals were washed with a mixed solvent (2-propanol/water = 5/6), and dried under reduced pressure to give the title compound (0.82 g).

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. 67515-76-8, Methyl 5-aminopicolinate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Kissei Pharmaceutical Co., Ltd.; EP2143724; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 74976-31-1, 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 74976-31-1, name is 6-Chloro-1H-pyrrolo[3,2-c]pyridine. This compound has unique chemical properties. The synthetic route is as follows.

Into a 100 mL 3-necked round-bottom flask was added a solution of 6-chloro- lH-pyrrolo [3, 2- c]pyridine (1.00 g, 6.55 mmol) in N,N-dimethylformamide (10 mL), potassium hydroxide (1.40 g, 24.9 mmol). The reaction mixture was stirred for 20 min at room temperature, then I2 (1.66 g, 6.54 mmol, 1.00) was added to the solution. The reaction mixture was stirred for additional 30 min at room temperature. The reaction mixture was diluted with H20 (50 mL) and the solids were collected by filtration. The solids were dried under reduced pressure overnight to afford 6-chloro- 3-iodo-lH-pyrrolo[3,2-c]pyridine (1.70 g, 93.0%) as a yellow solid. LCMS (ESI): RT (min) = 1.321, [M+H]+ = 279, method = N.

According to the analysis of related databases, 74976-31-1, the application of this compound in the production field has become more and more popular.

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

Reference of 7205-46-1, 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. 7205-46-1, name is 6-Chloro-1-methyl-1H-imidazo[4,5-c]pyridine, molecular formula is C7H6ClN3, 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 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (0.08 g), 6-chloro-l-methyl- lH-imidazo[4,5-c]pyridine (0.23 g, 0.0014 mol), 3-amino-4-ethyl-N,N-dimethylbenzamide (0.27 g, 0.0014 mol) and sodium tert-butoxide (0.20 g, 0.0021 mol) in 1,4-dioxane (15 mL) was stirred under N2 for 20 min. Tris(dibenzylideneacetone)dipalladium(0) (0.06 g) was added and the mixture was stirred at 100C for 7 h. The reaction mixture was concentrated in vacuo and the residue was treated with water and extracted into EtOAc. The organics were washed with brine, dried (MgSO i) and concentrated in vacuo to give the desired compound. For analytical purpose, a 60 mg sample was further purified by preparative HPLC to give the desired compound. [00324] NMR delta (ppm)(CHCl3-d): 8.69 (1 H, d, ArH), 7.71 (1 H, s, ArH), 7.52 (1 H, d, ArH), 7.32 (1 H, m, ArH), 7.16 (1 H, dd, ArH), 6.63 (1 H, d, ArH), 6.36 (1 H, s, NH), 3.68 (3 H, s, CH3), 3.09 (3 H, s, CH3), 3.03 (3 H, s, CH3), 2.69 (2 H, q, CH2), 1.24 (3 H, t, CH3). [00325] LCMS (lOcm ESCI Formic MeCN) tR 2.21 (min) m/z 324 (MH+).

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 7205-46-1, 6-Chloro-1-methyl-1H-imidazo[4,5-c]pyridine.

Reference:
Patent; GALAPAGOS NV; MENET, Christel; SCHMITT, Benoit; GENEY, Raphael; DOYLE, Kevin; PEACH, Joanne; PALMER, Nicholas; JONES, Graham; HARDY, David; DUFFY, James; WO2013/117649; (2013); 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. 52718-95-3, name is Methyl 2-bromonicotinate. A new synthetic method of this compound is introduced below., Application In Synthesis of Methyl 2-bromonicotinate

Step 1) Methyl 2-[(4-Hydroxymethyl)phenyl]-3-pyridinecarboxylate To a stirred solution of methyl 2-bromo-3-pyridinecarboxylate (3.45 g, 14.39 mmol) and 4-(trimethylstannyl)benzyl alcohol (3.90 g, 14.39 mmol), prepared as described in Step 1 of Example 3, in DMF (25 mL) was added bis(acetonitrile)palladium dichloride (0.19 g, 0.72 mmol) and CuI (0.27 g, 1.44 mmol). After 18 h, bis(triphenylphosphine)palladium dichloride (0.20 g, 0.28 mmol) and CuI (0.11 g, 0.57 mmol) were added and stirring was continued for 2 days at room temperature. The mixture was concentrated, taken up in water, and extracted with EtOAc. The combined extracts were washed with brine, dried, and concentrated. Purification by flash chromatography (50% EtOAc/hexane) gave 277 mg (8%) of product as a yellow oil. 1 H NMR (CDCl3) delta 3.69 (s, 3H), 4.69 (s, 2H), 7.35 (m, 1H), 7.38 (d, J=8.2 Hz, 2H), 7.49 (d, J=8.2 Hz, 2H), 8.08 (dd, J=7.9, 1.8 Hz, 1H), 8.75 (m, 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, 52718-95-3, Methyl 2-bromonicotinate.

Reference:
Patent; American Home Products Corporation; US5283242; (1994); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem