Day: March 23, 2022

Related Products of 22620-32-2, 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. 22620-32-2, name is (5-Fluoropyridin-3-yl)methanol. A new synthetic method of this compound is introduced below.

To a solution of (5-fluoropyridin-3-yl)methanol (430 mg, 3.4 mmol) in anhydrous dichloromethane (30 mL) was added dropwise phosphorus tribromide (650 muL, 6.8 mmol). The mixture was stirred at room temperature overnight. Dichloromethane was evaporated. The residue was dried in vacuo, affording 3-(bromomethyl)-5- fluoropyridine hydrobromide. The product was used without further purification.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,22620-32-2, (5-Fluoropyridin-3-yl)methanol, and friends who are interested can also refer to it.

Reference:
Patent; CHLORION PHARMA, INC.; UNIVERSITE LAVAL; ATTARDO, Giorgio; TRIPATHY, Sasmita; WO2010/132999; (2010); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 75291-85-9 , The common heterocyclic compound, 75291-85-9, name is 5-Bromo-2-chloronicotinamide, molecular formula is C6H4BrClN2O, 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.

General procedure: To 1,4-dioxane (30 mL) were added tert-butyl piperazine-1-carboxylate (2.89 g, 15.51 mmol), 5-bromo-2-chloropyrimidine (2.00 g, 10.34 mmol) and potassium carbonate (2.86 g, 20.68 mmol) sequentially. The mixture was heated to 110 C, after stirring for 12 hours, the reaction mixture was cooled to room temperature, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (PE/EtOAc (v/v) = 20/1) to give the title compound as a pale yellow solid (3.15 g, 88.7%).; The title compound was prepared using 5-bromo-2-chloronicotinamide (1.50 g, 6.37 mmol), tert-butyl piperazine 1-carboxylate (1.19 g, 6.37 mmol) and potassium carbonate (3.52 g, 25.48 mmol) in acetonitrile (20 mL) according to the process described in Step 4 of Example 1, and the crude product was purified by silica gel chromatography (PE/EtOAc (v/v) = 20/1) to give the title compound as a pale yellow solid (2.25 g, 91.8%).MS (ESI, pos. ion) m/z: 385.2 [M+H] and?H NMR (400 IVIFIz, DMSO-d6): (ppm) 8.31 (d, J= 2.4 Hz, 1H), 7.95 (s, 1H), 7.82 (d, J= 2.0 Hz, 1H), 7.63 (s, 1H), 3.42 (d, J= 4.8 Hz, 4H), 3.27 (d, J= 4.8 Hz, 4H), 1.41 (s, 9H).

The synthetic route of 75291-85-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SUNSHINE LAKE PHARMA CO., LTD.; ZHANG, Yingjun; JIN, Chuanfei; LIANG, Haiping; YI, Chao; ZHANG, Ji; (94 pag.)WO2016/192657; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 6623-21-8, 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 6623-21-8, name is 4,6-Dimethylnicotinonitrile. This compound has unique chemical properties. The synthetic route is as follows.

4,6-Dimethylnicotinonitrile (1.0 g, 7.6 mmol) was dissolved in ethanol (35 mL) and the mixture was treated with Raney nickel (5 mL, slurry in water) and hydrazine hydrate (3.8 mL, 75.6 mmol). The solution was stirred overnight at room temperature. Compound 2a was obtained by filtering the reaction mixture through a pad of diatomaceous earth, which was rinsed with methanol (3×50 mL). The filtrate was dried over Na2SO4, filtered and concentrated under reduced pressure to afford Compound 2a. The compound was used without additional purification. M+(ES+)=137.1 1H NMR (DMSO, d6) delta 2.35 (s, 3H), 2.42 (s, 3H), 4.01 (s, 2H), 7.13 (s, 1H), 8.42 (s, 1H).

According to the analysis of related databases, 6623-21-8, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Flores, Christopher M.; Wade, Paul R.; US2011/319400; (2011); 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. 1070892-04-4, name is 5-Bromo-2-(trifluoromethyl)isonicotinonitrile, molecular formula is C7H2BrF3N2, 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. Safety of 5-Bromo-2-(trifluoromethyl)isonicotinonitrile

4-[5-Chloro-2-(methyl-o-tolyl-carbamoyl)-4-(4,4,5,5-tetramethyl- [1 ,3,2]dioxaborolan-2-yl)-phenoxy]-butyric acid tert-butyl ester (444.0 mg, 0.8 mmol), 5- bromo-2-trifluoromethyl-isonicotinonitrile (171.0 mg, 0.7 mmol), Pd(Ph3P)4 (78.6 mg, 0.07 mmol), Na2CO3 (432.0 mg, 4.1 mmol) in dioxane (9 ml_) and water (1 ml_) was degassed with N2 for 5 min, sealed, and heated at 100 0C for 12 hrs. The mixture was then partitioned between ethyl acetate and water. The organic layer was washed with water and brine, dried over MgSO4 and filtered. Concentration and purification by TLC plates eluting with ethyl acetate in hexanes (2/3) and again with TLC plates eluting with acetonitrile/dichloromethane (1/9) gave 4-[5-chloro-4-(4-cyano-6-trifluoromethyl- pyridin-3-yl)-2-(methyl-o-tolyl-carbamoyl)-phenoxy]-butyric acid tert-butyl ester (410 mg). MS: 588.7 (M+H)+; tR = 11.05 min (method 3).

With the rapid development of chemical substances, we look forward to future research findings about 1070892-04-4.

Reference:
Patent; NEUROCRINE BIOSCIENCES, INC.; WO2008/124610; (2008); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 1228880-68-9, Adding some certain compound to certain chemical reactions, such as: 1228880-68-9, name is Methyl 3-bromo-5-methylpicolinate,molecular formula is C8H8BrNO2, 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 1228880-68-9.

a) 3-(2-Methoxycarbonyl-vinyl)-5-methyl-pyridine-2-carboxylic acid methyl ester 3-Bromo-5-methyl-pyridine-2-carboxylic acid methyl ester (1.6 g, 6.945 mmol), methylacrylate (1.50 g, 17.39 mmol), allylpalladium(II) chloride dimer (0.127 g, 0.348 mmol), tri-o-tolylphosphine (0.212 g, 0.695 mmol), water free sodium carbonate (2.211 g, 20.9 mmol), and N,N.dimethylacetamide (4.56 ml) were added to toluene (15 ml) and the reaction mixture was stirred for 18 h at 115 C. in a microwave apparatus. The mixture was diluted with EtOAc, washed with brine, dried over sodium sulfate, and the solvents were evaporated under reduced pressure. The residue was purified by chromatography on silica (Flashmaster, hex to hex/EtOAc 2/3 over 40 min, 20 min hex/EtOAc 2/3) to give the product as off-white solid (1.31 g, 80%). [1H-NMR (DMSO-d6, 600 MHz) delta 8.51 (s, 1H), 8.20 (s, 1H), 8.10 (d, 1H), 6.69 (d, 1H), 3.88 (s, 3H), 3.74 (s, 3H), 2.39 (s, 3H); LCMS RtL=2.753 min; [M+H]+=236.0]

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. 1228880-68-9, Methyl 3-bromo-5-methylpicolinate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; NOVARTIS AG; US2012/258973; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 1206968-88-8, (5-Bromo-3-chloropyridin-2-yl)methanol, 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, Quality Control of (5-Bromo-3-chloropyridin-2-yl)methanol, blongs to pyridine-derivatives compound. Quality Control of (5-Bromo-3-chloropyridin-2-yl)methanol

DMP (45.83g, 102.lOmmoI) was added portion wise to a stirred solution of (5-bromo-3-chloropyridin-2-yl)-methanol (16g, 72.O7mmoI) in DCM (320mL) at 0C and stirred for 16h at RT. The RM was filtered through celite and washed with DCM (3x100mL).The filtrate was washed with Aq.NaHCO3 (200mL), water (200mL), brine(250mL), dried (Na2SO4), filtered, concentrated under reduced pressure to give crude. The crude was purified by CC (0-5% EtOAc in PE) to give 5-bromo-3-chloropicolinaldehyde (lOg, 66%) as light yellow solid.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1206968-88-8, (5-Bromo-3-chloropyridin-2-yl)methanol, and friends who are interested can also refer to it.

Reference:
Patent; GRUeNENTHAL GMBH; SCHUNK, Stefan; REICH, Melanie; JAKOB, Florian; DAMANN, Nils; HAURAND, Michael; KLESS, Achim; ROGERS, Marc; SUTTON, Kathy; WO2015/158427; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 4214-74-8 ,Some common heterocyclic compound, 4214-74-8, molecular formula is C5H4Cl2N2, 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 4 Preparation of 2-bromo-3,5-dichloropyridine 2-Bromo-3,5-dichloropyridine was prepared from 2-amino-3,5-dichloropyridine according to the method of L. C. Craig, J. Amer. Chem. Soc., 1934, 56, 231 to furnish a pale yellow crystalline solid in 76% yield, m.p. 37-38 C.

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. 4214-74-8, 3,5-Dichloropyridin-2-amine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Pfizer Inc.; US4510148; (1985); A;,
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 72141-44-7, name is 4-Chloro-2-methoxypyridine. This compound has unique chemical properties. The synthetic route is as follows. category: pyridine-derivatives

To a solution of compound 2 (28.7 g. 0.2 mol) in DMF (50 mL) was added NBS (35.5 g, 0.2 mol). The mixture was heated at 90C for 8 hours. The crude compound 3 was collected by filtration. (22 g, 50% yield).

With the rapid development of chemical substances, we look forward to future research findings about 72141-44-7.

Reference:
Patent; INTERMUNE, INC.; RAMPHAL, Johnnie, Y.; BUCKMAN, Brad, Owen; EMAYAN, Kumaraswamy; NICHOLAS, John, Beamond; SEIWERT, Scott, D.; WO2015/153683; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 188577-68-6, 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. 188577-68-6, name is 4,5-Dichloropyridin-2-amine, molecular formula is C5H4Cl2N2, 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.

[0928] To a solution of phosgene (20% solution in toluene,0.186 ml, 0.353 mmol) in THF (2 ml) was added triethylamine(0.141 ml, 1.01 mmol). To the resulting white suspensionwas added a solution of 7-(dimethoxymethyl)-1,2,3,4-tetrahydro-1,8-naphthyridine (intermediate 4, 70 mg, 0.336mmol) in THF (2 ml) drop wise. The resulting yellow suspensionwas stirred at room temperature for 1 h. 4,5-dichloropyridin-2-amine (65.7 mg, 0.403 mmol) in THF (1 ml) wasadded to the mixture and stirred at room temperature for 16 h.The reaction mixture was filtered through a silica gel plug andwashed with heptanes/EtOAc 1:1 (35 ml), the filtrate wasconcentrated. The residue was dissolved in dioxane (1 ml)and treated with HCl (4 Min dioxane, 1 ml, 4.0 mmol). Themixture was stirred at room temperature for 2 h, diluted withDCM and quenched with saturated aqueous NaHC03 . Theorg. layer was collected and the water layer was extractedwith DCM. The combined org. layers were dried over anhydrousNa2S04 and concentrated under reduced pressure. Thecrude product was dissolved in acetonitrile/NMP/TFA, filteredthrough a syringe filter (0.2 f.tm) and purified by preparativereverse phase LC-MS (RP 1). The clean fractionswere combined and lyophilized to obtain the title compoundas an off white solid.

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 188577-68-6, 4,5-Dichloropyridin-2-amine.

Reference:
Patent; Novartis AG; Buschmann, Nicole; Fairhurst, Robin Alec; Furet, Pascal; Knoepfel, Thomas; Leblanc, Catherine; Liao, Lv; Mah, Robert; Nimsgern, Pierre; Ripoche, Sebastien; Xiong, Jing; Han, Bo; Wang, Can; Zhao, Xianglin; US2015/119385; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 19346-43-1, Adding some certain compound to certain chemical reactions, such as: 19346-43-1, name is 2-Fluoro-3-nitro-4-picoline,molecular formula is C6H5FN2O2, 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 19346-43-1.

1. Preparation of 3-Amino-2-fluoro-4-methylpyridine To a solution of 10.1 g (grams) (65 mmol (millimole)) of 2-fluoro-4-methyl-3-nitropyridine in 200 mL (milliliter) of ethyl acetate was added 25 g (0.40 mol) of acetic acid and 0.8 g of 5 percent palladium on carbon catalyst. This mixture was shaken under 50 psig (pounds per square inch gauge, 2400 kiloPascals) pressure of hydrogen for 18 hours, was filtered, and was concentrated by evaporation under reduced pressure to obtain an oil. This oil was partitioned between dilute aqueous sodium bicarbonate and ether. The organic phase was separated, dried over magnesium sulfate, and filtered. The filtrate was concentrated by evaporation under reduced pressure and the residue was purified by column chromatography to obtain 7.2 g (88 percent of theory) of the title compound as a colorless solid melting at 63-64 C. Elemental Analysis C6 H7 FN2 Calc.: %C, 57.1; %H, 5.59; %N, 22.2 Found: %C, 57.2; %H, 5.73; %N, 22.1 1 H NMR (nuclear magnetic resonance spectrum (200 megahertz)) CDCl3:7.4 (d, 1H, J=5.0); 6.8 (d, 1H, J=5.0); 3.7 (br, 2H); 2.1 (s, 3H); 13C NMR CDCl3:152.6 (d, J=229); 134.1 (d, J=8.6); 133.8 (d, J=14.5); 128.1 (d, J=27.1); 123.3, 16.4 (d, J=4.1).

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. 19346-43-1, 2-Fluoro-3-nitro-4-picoline, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; DowElanco; US5614469; (1997); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem