Tag: M.W:100-200

Application of 100367-39-3, 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. 100367-39-3, name is 4-Bromo-2-methoxypyridine. A new synthetic method of this compound is introduced below.

A suspension of 4-bromo-2-methoxypyridine (1.225 g, 6.511 mmol), A- methylthiophenyl boronic acid (2.188 g, 13.02 mmol), PdCl2(dppf) (531 mg, 0.651 mmol) Attorney’s Docket 2882.023B and K2CO3 (1.797 g, 13.02 mmol) in DMSO (10 niL) was degassed under reduced pressure for 25 min. The suspension was put under N2 and stirred at 95 0C for 16 h. The suspension was cooled, H2O was added, and the suspension was filtered to afford a light colored solid. Flash chromatography (silica gel, hexanes/(l :l EtOAc/hexanes), 100:0 to 0 : 100) afforded 1.10 g of a white powder

At the same time, in my other blogs, there are other synthetic methods of this type of compound,100367-39-3, 4-Bromo-2-methoxypyridine, and friends who are interested can also refer to it.

Reference:
Patent; ALBANY MOLECULAR RESEARCH, INC.; WO2009/89482; (2009); 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. 126053-15-4, name is 4-Chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-ol. This compound has unique chemical properties. The synthetic route is as follows. Application In Synthesis of 4-Chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-ol

Example A4PXQP ar ation _o_ f intermediate 14 ; Dibromotriphenyl- phosphorane (0.004 mol) was added to a solution of 4-chloro-6,7- dihydro- 5H-Cyclopenta[b]pyridin-7-ol (0.002 mol) in acetonitrile (6 ml). The mixture was stirred for 3 hours, quenched with potassium carbonate 10% and extracted with EtOAc. The organic layer was separated, dried (MgSO4), filtered and the solvent was evaporated till dryness. The residue (1.6g) was purified by column chromatography over silica gel (15-40 mum) (eluent DCM 100). The pure fractions were collected and the solvent was evaporated till dryness, yielding 0.3 Ig (67%) of intermediate 14.

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, 126053-15-4, 4-Chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-ol.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; WO2009/118384; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 5223-06-3, 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. 5223-06-3, name is 2-(5-Ethylpyridin-2-yl)ethanol, molecular formula is C9H13NO, 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) To a solution of 2-(5-ethyl-2-pyridyl)ethanol (53.0 g) and 4-fluoronitrobenzene (47.0 g) in DMF (500 ml) was added portionwise under ice-cooling 60% sodium hydride in oil (16.0 g). The mixture was stirred under ice-cooling for one hour, then at room temperature for 30 minutes, poured into water and extracted with ether. The ether layer was washed with water and dried (MgSO4). The solvent was evaporated off to give 4-[2-(5-ethyl-2-pyridyl)ethoxy]nitrobenzene as crystals (62.0 g, 62.9%). Recrystallization from ether-hexane gave colorless prisms, m.p. 53-54 C.

According to the analysis of related databases, 5223-06-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Takeda Chemical Industries, Ltd.; US4687777; (1987); A;,
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. 188554-13-4, name is 2-Hydroxyisonicotinaldehyde, the common compound, a new synthetic route is introduced below. Safety of 2-Hydroxyisonicotinaldehyde

4-[(E)-2-(4-Fluoro-phenyl)-vinyl]-pyridin-2-ol:To a solution of dieihyl-4-fI?iorobenzyl-phosphonatc (515 mg, 2.09 mmol) in THF ( 10.0 mL) was added potassium tert-buloxide (246 mg, 2.09 mmol). After stirring at 20 0C for 1 h, the mixture was treated with 2-hydroxypyridoaIdehyde (246 mg, 2.00 mmol), and allowed to stir for 3 h at 20 0C. The reaction mixture was quenched with water, and the aqueous phase was extracted with DCM, the combined organic phases were dried over MgSO4 and concentrated in vacuo. The crude oil was purified by column chromatography (DCM to 20%methanol in DCM) gave the desired product 4-[(L)-2-(4-fluoro-phenyO-vinyl]-pyridin-2-ol (32.0 mg, 7.5%, 5: 1 transxis) as white crystal. 1H NMR (400 MHz, CDCh) ?: 7.56 (m, 2H), 7.33 (m, I H), 7.26 (m, IH), 7.08 (m, 2H), 6.87 (m, IH), 6.64 (m, IH), 6.54 (m, IH); ESMS m/e: 216 (M+H)+.

The synthetic route of 188554-13-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; H. LUNDBECK A/S; WO2009/120655; (2009); 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. 16063-69-7, name is 2,4,6-Trichloropyridine, the common compound, a new synthetic route is introduced below. Recommanded Product: 2,4,6-Trichloropyridine

To a solution of 2,4,6-trichloropyridine (3.64 g, 20.0 mmol) in DMF (20 mL) at 0C were slowly added NaH (60% in mineral oil, 840 mg, 21 mmol) and MeOH (673 mg, 21 mmol). The mixture was stirred at room temperature for 16 h. The mixture was concentrated and partitioned between EtOAc (30 mL) and water (15 mL). The organic extracts were dried (Na2SO4), filtered, and concentrated. The residue was purified by silica gel chromatography eluting with ethyl acetate in hexane (0-5 percent) to afford the title compound (3.0 g, yield: 94%).

The synthetic route of 16063-69-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; NEW ERA PHARMA, INC.; XIAN, Jun; (82 pag.)WO2018/106459; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 614-18-6, Adding some certain compound to certain chemical reactions, such as: 614-18-6, name is Ethyl nicotinate,molecular formula is C8H9NO2, 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 614-18-6.

EXAMPLE 58 Preparation of N-(2-Hydroxyethyl)-3-pyridinecarboxamide A solution of 49.2 g (0.32525 mol) ethyl nicotinate and 72 g (1.17 mol) ethanolamine was heated at 70 C. for 60 hours. The excess ethanolamine was removed under reduced pressure and the resulting viscous cream oil was stirred with ether for 48 hours The resulting white solid was removed by filtration, affording 46 g 15 (85 1%) of the title compound melting at 75-78 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. 614-18-6, Ethyl nicotinate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; University of Florida; US5017566; (1991); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 677728-92-6 ,Some common heterocyclic compound, 677728-92-6, molecular formula is C6H4FNO, 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 6 Synthesis of 2-fluoro-5-[(E)-2-(4-methoxyphenyl)vinyl]pyridine (1f); Compound 1f was synthesized by Horner-Wadsworth-Emmons.10Synthe -fluoro-5-[(E)-2-(4-methoxyphenyl)vinyl1pyridine (1f)To a solution of diethyl [4-(meththoxy)benzyl]phosphonate (500 mg, 1 .94 mmol) and 6-fluoropyridine-3-carbaldehyde (242 mg, 1 .94 mmol) in DMF (4 mL) was added a solution of potassium tert.butylat (543 mg, 4.8 mmol) in DMF (16 mL). After stirring for one hour the reaction mixture was quenched with saturated aqueous ammonium chloride solution, extracted with dichloromethane, washed with brine and dried over sodium sulfate. The residue was purified by chromatography on silica gel (ethyl acetate in hexane 0 to 50%) to yield 50.6 mg (10.3%) of the title compound.1 H-NMR (400 MHz, CHLOROFORM-d) d = 3.85 (s, 3H), 6.92 (d, 1 H), 6.92 (dd, 1 H), 6.93 (d, 2H), 7.05 (d, 1 H), 7.46 (d, 2H), 7.93 (ddd, 1 H), 8.28 (d, 1 H) ppm. 19F-NMR (376 MHz, CHLOROFORM-d) delta = -70.13 (d, 1 F) ppm. MS ES+ m/z = 230.13 (M+1 ).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,677728-92-6, its application will become more common.

Reference:
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; BERNDT, Mathias; BROCKSCHNIEDER, Damian; HEINRICH, Tobias; BERGER, Markus; WO2011/141515; (2011); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 128071-98-7 ,Some common heterocyclic compound, 128071-98-7, molecular formula is C5H3BrFN, 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.

[00208] Step 1 : To a solution of 4-bromo-2-fluoropyridine (5.0 g, 28.4 mmol) in DMSO (56.8 mL, 28.4 mmol) was sequentially added tetrahydro-2H-pyran-4-amine (3.30 g, 32.7 mmol) and cesium carbonate (18.5 g, 56.8 mmol). The mixture was then stirred at 80 C for 4 hours and cooled to ambient temperature. The mixture was then poured into water and extracted into EtOAc (200 mL). The combined organics were washed with half saturated brine (50 mL), dried (MgS04), filtered and concentrated in vacuo. The crude isolated was purified by flash chromatography (Ready Sep 120 g) eluting with a gradient of 1-10% MeOH:DCM (10 CV) to provide 4-bromo-N-(tetrahydro-2H-pyran-4-yl)pyridin-2 -amine (2.80 g, 38.3% yield). LCMS (APCI+) m/z 257, 259 (M+l) with one bromine isotope.

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. 128071-98-7, 4-Bromo-2-fluoropyridine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ARRAY BIOPHARMA INC.; GENENTECH, INC.; BLAKE, James, F.; COOK, Adam; GAUDINO, John; GUNAWARDANA, Indrani, W.; HICKEN, Erik, James; HUNT, Kevin, W.; LYON, Michael; METCALF, Andrew, T.; MOHR, Peter, J.; MORENO, David, A.; NEWHOUSE, Brad; REN, Li; SCHWARZ, Jacob; CHEN, Huifen; GAZZARD, Lewis; SCHMIDT, Jane; DO, Steve; WO2015/103137; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 63725-51-9, 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 63725-51-9, name is 6-Chloro-1H-pyrazolo[3,4-b]pyridine. This compound has unique chemical properties. The synthetic route is as follows.

Intermediate Gen-19-a (5 g, 32.6 mmol, 1 eq) is dissolved in DMF (30 mL). I2 (16.4 g, 64.6 mol, 2 eq) and KOH (6.8 g, 121 mmol, 3.7 eq) are added. The reaction mixture is stirred at rt for 3 h. Then the reaction is quenched with a 10% solution of Na2S2O3. The aqueous layer is extracted four times with 50 mL Et2O, three times with DCM and three times with DCM/ MeOH 9:1. The combined organic layers are dried over Na2SO4, after washing with brine (50 mL), filtered and concentrated to afford Gen-20-a.

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 63725-51-9, 6-Chloro-1H-pyrazolo[3,4-b]pyridine.

Reference:
Patent; SANIERE, Laurent Raymond Maurice; HUCK, Jacques; DYKES, Graeme James; SCHMITT, Benoit Antoine; BLANC, Javier; BUTLER, Anna Sara; BONNATERRE, Florence Marie-Emilie; BEAUMONT, Stephane Nicolas Alain; US2015/80391; (2015); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 7356-60-7, 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 7356-60-7, name is Nicotinimidamide hydrochloride. This compound has unique chemical properties. The synthetic route is as follows.

Compound B (124 g, 223.23 mmol),3-pyridinecarboxamidine hydrochloride (52.77g, 334.83mmol)With potassium phosphate (165.84g, 781.31mmol),1240 ml of xylene was placed in a reaction flask and heated with stirring to maintain reflux at 140 C.After the reaction was completed, the temperature was lowered to 90 C.Add 500ml of deionized water and stir for 5min.After removing the aqueous layer, the organic layer was concentrated to dryness and a solid precipitated out.The solid was washed with ethyl acetate and filtered to obtain a white solid.64g of white solid compound C was obtained after drying,Yield: 43.66%.

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 7356-60-7, Nicotinimidamide hydrochloride.

Reference:
Patent; E-RAY OPTOELECTRONICS TECHNOLOGY CO., LTD.; CHANGZHOU TRONLY E-RAY OPTOELECTRONICS MATERIAL CO., LTD.; HUANG, HEH LUNG; CHAO, TENG CHIH; GUO, HUANG MING; LIN, CHI JEN; CHANG, MIN JONG; (48 pag.)TWI672298; (2019); B;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem