Category: pyridine-derivatives

Related Products of 18677-48-0, 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. 18677-48-0, name is 3,5-Dimethoxypyridine, molecular formula is C7H9NO2, 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.

3,5-dimethoxypyridine of structure 1 (1.4 g, 10 mmol, 1.0 equiv.) was dissolved in tetrahydrofuran(30 mL), cooled to -78 C, add n-butyllithium (n-BuLi) (2.5M n-hexane solution, 4.8mL, 12mmol, 1.2equiv.), Stir for five minutes and add 1,1,2,2-tetrabromoethane (1.75 mL, 15 mmol, 1.5 equiv.). Return to room temperature. Post-processing, purification by silica gel column gave 1.14 g of 4-bromo-3,5-dimethoxypyridine 2 in a yield of 52%.

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 18677-48-0, 3,5-Dimethoxypyridine.

Reference:
Patent; Chongqing University; Li Yang; Chen Di; (11 pag.)CN109836446; (2019); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 866546-07-8 ,Some common heterocyclic compound, 866546-07-8, molecular formula is C7H5ClN2, 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: In a microwave reaction vial with a magnetic stirring bar was placed the azaindoleor indole (0.38 mmol), aldehyde (0.19 mmol), and K2CO3 (176 mg, 1.27 mmol), followedby addition of 2.5 mL of 1:1 mixture of MeOH:H2O. The resulting mixture was placed ina microwave reactor and irradiated at 130 oC for 30 minutes. After cooling to roomtemperature, the volatiles were removed under reduced pressure. The crude residue wasdiluted with water (10 mL) and extracted with ethyl acetate (3 x 10 mL). The combinedorganic layers were dried over sodium sulfate, filtered, and the resulting filtrate evaporated in vacuo to give a crude solid that was purified using reversed-phase HPLC,eluting with MeCN/H2O with a trace of TFA to give the desired compound.

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. 866546-07-8, 5-Chloro-1H-pyrrolo[2,3-b]pyridine, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Uddin, Md. Imam; Buck, Jason R.; Schulte, Michael L.; Tang, Dewei; Saleh, Samir A.; Cheung, Yiu-Yin; Harp, Joel; Manning, H. Charles; Tetrahedron Letters; vol. 55; 1; (2014); p. 169 – 173;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 69045-79-0, 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.69045-79-0, name is 2-Chloro-5-iodopyridine, molecular formula is C5H3ClIN, molecular weight is 239.4415, as common compound, the synthetic route is as follows.

General procedure: In a glove box, a flame-dried pressure Schlenk tube was charged with NaI(0.3 equiv). The Schlenk tube was taken out of the glove box and charged with amide 1 (1.5equiv), iodopyridine reagent (1 equiv), Ag2CO3 (1.5 equiv), (BnO)2PO2H (0.2 equiv) andPd(OAc)2 (0.1 equiv). DMA and Toluene (1:20 in v/v ratio, 0.1 M) were added. The tube wastightly closed and flushed with argon by three freeze-pump-thaw cycles. The mixture was stirredat 130 C for 24 h. Subsequently, it was diluted with EtOAc (40 mL) and washed with brine (2 ¡Á20 mL) and water (20 mL). The organic layer was dried over Na2SO4, filtered and concentrated invacuo. The crude product was purified by flash chromatography (hexane/ EtOAc in 85/15 to 50/50v/v ratio). Unless otherwise noted, the reactions were run on 0.1 mmol scale.

Statistics shows that 69045-79-0 is playing an increasingly important role. we look forward to future research findings about 2-Chloro-5-iodopyridine.

Reference:
Article; Hu, Peng; Bach, Thorsten; Synlett; vol. 26; 20; (2015); p. 2853 – 2857;,
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. 771579-27-2, name is 3-(Aminomethyl)-4,6-dimethylpyridin-2(1H)-one. A new synthetic method of this compound is introduced below., Quality Control of 3-(Aminomethyl)-4,6-dimethylpyridin-2(1H)-one

[01709] The above acid (0.47 g, 1 .52 mmol) was then dissolved in DMSO (5 mL) and 3- (amino methyl)-4, 6-dimethylpyridin-2( l H)-one (0.462 g, 3.04 mmol) was added.. The reaction mixture was stirred at room temperature for 15 min before PYBOP (1 .18 g, 2.28 mmol) was added to it and stirring was continued overnight. After completion of the reaction, reaction mass was poured into ice to obtain a solid which was filtered and dried to afford the title compound (0.40 g, 59%). LCMS: 444.25 (M + 1 )+; HPLC: 96.85% ((at) 254 nm) (R,;6.3 10; Method: Column: YMC ODS-A 150 mm x 4.6 mm x 5 mu; Mobile Phase: A; 0.05% TFA in water/ B; 0.05% TFA in acetonitrile; Jnj. Vol: 10 mu, Col. Temp.: 30 C; Flow rate: 1 .4 mL/min.; Gradient: 5% B to 95% B in 8 min, Hold for 1 .5 min, 9.5 1 – 12 min 5% B); NMR (DMSO-Patent; EPIZYME, INC.; EISAI CO., LTD.; KUNTZ, Kevin, Wayne; CHESWORTH, Richard; DUNCAN, Kenneth, William; KEILHACK, Heike; WARHOLIC, Natalie; KLAUS, Christine; ZHENG, Wanjun; WO2012/142513; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 183208-35-7, 5-Bromo-1H-pyrrolo[2,3-b]pyridine, 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, 183208-35-7, blongs to pyridine-derivatives compound. Recommanded Product: 5-Bromo-1H-pyrrolo[2,3-b]pyridine

The 5-bromo-7-azaindole 27 (0.5 g, 2.54 mmol), bis (pinacolato) diboron (0. 968 g, 3. 81 mmol), potassium acetate (0.748 g, 7.61 MMOL), [1,1′- bis (diphenylphosphino) ferrocene] dichloropalladium (II) complex with CH2C12 (1: 1) (49 mg, 0.06 mmol) and DMF (11 ML) were heated in a sealed tube at 80 C. After 44 h, the reaction mixture was allowed to cool to room temperature, diluted with EtOAc and saturated brine, and partitioned. The aqueous layer was extracted with EtOAc (3X). The combined organic extracts were washed with brine (LX), dried (MgSO4), filtered and concentrated in vacuo. The crude pinacol ester 44 was used directly for the next step without any further PURIFICATION. 1H NMR (400 MHz; CDC13) 8 1. 38 (s, 12H), 6.51 (d, J= 3.5 Hz, 1H), 7.32 (d, J= 3.5 Hz, 1H), 8. 42 (d, J= 1.2 Hz, 1H), 8. 63 (d, J= 1.2 Hz, 1H) and 10.59 (brs, NH).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,183208-35-7, its application will become more common.

Reference:
Patent; EISAI LONDON RESEARCH LABORATORIES LIMITED; WO2004/78757; (2004); A2;,
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. 69950-65-8, name is Methyl 6-formyl-2-pyridinecarboxylate, molecular formula is C8H7NO3, 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. Application In Synthesis of Methyl 6-formyl-2-pyridinecarboxylate

To a solution of methyl 6-formylpicolinate (165 mg, 0.999 mmol) in THF (5 mL) was added dropwise phenylmagnesium chloride (0.6 mL, 1.2 mmol, 2 M in THF) at -78 C. The reaction mixture was stirred at -78 C for 5 min, and then room temperature for 10 min. The reaction was quenched by the addition of saturated aqueous ammonium chloride, and then extracted with ethyl acetate. The conbined organic layer was washed with brine, and dried over Na2SO4. The mixture was concentrated in vacuo. The crude material was purified by flash column chromatography on silica gel (Hexane:AcOEt = 1:1) to give 8e as a slightly yellow oil (120 mg, 49%). 1H NMR (400 MHz, CDCl3) delta 4.01 (3H, s), 5.11 (1H, d, J = 2.4 Hz), 5.85 (1H, d, J = 2.4 Hz), 7.26-7.42 (6H, m), 7.76 (1H, t, J = 7.3 Hz), 8.02 (1H, d, J = 7.3 Hz). 13C NMR (100 MHz, CDCl3) delta 52.8, 75.1, 123.9, 124.8, 127.1, 128.0, 128.6, 137.8, 142.5, 146.3, 161.5, 165.4. IR (ATR) nmax 3414, 3063, 3030, 2952, 1722, 1588, 1494, 1438, 1286, 1193, 1135, 1051 cm-1. MS (ESI) 244 (M+H)+. HRMS (ESI) calcd for C14H14NO3 (M+H)+ 244.09737, found 244.09731.

With the rapid development of chemical substances, we look forward to future research findings about 69950-65-8.

Reference:
Article; Nishigaya, Yosuke; Umei, Kentaro; Watanabe, Daisuke; Kohno, Yasushi; Seto, Shigeki; Tetrahedron; vol. 72; 12; (2016); p. 1566 – 1572;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 128071-75-0, 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. 128071-75-0, name is 2-Bromonicotinaldehyde, molecular formula is C6H4BrNO, 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 40 mL vial was charged with 6 mL of 1,4-dioxane and a stir bar. The mixture was degassed with nitrogen for 5 minutes. The vial was charged with 2-bromonicotinaldehyde (240 mg, 1.290 mmol), cyclopropylboronic acid (222 mg, 2.58 mmol), and cesium fluoride (588 mg, 3.87 mmol). The vial was degassed again with nitrogen. PdCl2dppf (53.1 mg, 0.065 mmol) was added and the reaction mixture was heated to 100 C. under nitrogen. Upon reaction completion, the mixture was cooled to room temperature. Ethyl acetate (30 mL) was added, and the mixture was stirred for 5 minutes, filtered over a pad of silica gel with ethyl acetate, concentrated, and purified via flash column chromatography (0 to 20% ethyl acetate in heptanes) to provide 2-cyclopropylnicotinaldehyde (170 mg, 1.155 mmol, 90% yield). 1H NMR (501 MHz, DMSO-d6) delta ppm 10.40 (s, 1H), 8.61 (dd, J=4.7, 1.8 Hz, 1H), 8.10 (dd, J=7.8, 1.9 Hz, 1H), 7.33 (dd, J=7.9, 4.8 Hz, 1H), 3.08 (tt, J=8.0, 4.7 Hz, 1H), 1.18-0.90 (m, 4H); MS (ESI+) m/z 148.0 (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 128071-75-0, 2-Bromonicotinaldehyde.

Reference:
Patent; AbbVie S.a.r.l.; Galapagos NV; Altenbach, Robert J.; Bogdan, Andrew; Couty, Sylvain; De Lemos, Elsa; Desroy, Nicolas; Duthion, Beranger; Gfesser, Gregory A.; Greszler, Stephen N.; Housseman, Christopher Gaetan; Koenig, John R.; Kym, Philip R.; Liu, Bo; Scanio, Marc J.; Searle, Xenia; Wang, Xueqing; Yeung, Ming C.; Zhao, Gang; (263 pag.)US2018/99931; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 101012-32-2, (2-Chloropyridin-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, name: (2-Chloropyridin-3-yl)acetonitrile, blongs to pyridine-derivatives compound. name: (2-Chloropyridin-3-yl)acetonitrile

To a solution of 2-(2-methylpyridin-3-yl)acetoni- trile (1.0 g, 6.6 mmol) and methyl acrylate (1.8 mE, 19.9 mmol) in THF (10 mE) at 0 C. was added potassiumtert-butoxide (8.6 mE, 8.6 mmol, 1 M in THF) and the resulting reaction mixture stirred at 25 C. for 3 h. The mixture was partitioned between H20 (100 mE) and EtOAc (80 mE), the aqueous layer further extracted with EtOAc (2×80 mE), combined organics dried (Na2SO4) and the solvent removed in vacuo. The residue was purified by colunm chromatography (normal silica, mesh size: 60-120, 0% to 0.5% MeOH in DCM) to give methyl 5-(2-chloro- pyridin-3-yl)-5-cyano-2-oxocyclohexane- 1 -carboxylate (1.2 g, 63%) as a yellow liquid.ECMS (Method F): mlz 293 (M+H) (ESj, at 1.97 mm UV active.

The synthetic route of 101012-32-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Heptares Therapeutics Limited; Brown, Giles Albert; Congreve, Miles Stuart; Pickworth, Mark; Tehan, Benjamin Gerald; (107 pag.)US2018/105491; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 59207-23-7, 2-Methylthieno[3,2-c]pyridin-4(5H)-one, 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, 59207-23-7, blongs to pyridine-derivatives compound. Application In Synthesis of 2-Methylthieno[3,2-c]pyridin-4(5H)-one

7-bromo-2-methyIthieno [3,2-cl pyridin-4(5//)-one; To a solution of 2-methylthieno [3,2- c]pyridin-4(5H)-one (4.84 g, 28.9 mmol) in acetic acid (84.0 mL) is added bromine drop wise (1.64 mL, 31.8 mmol). The reaction mixture is heated to reflux for one hour. After one hour, the solution is cooled to rt, and water is added until a solid is formed. The remaining solid is filtered, rinsed with water, and dried under vacuum to afford the title compound (6.01 g, 85% yield). 1H NMR delta 11.7 (br s, IH), 7.47 (s, IH), 7.30 (s, IH), 3.38 (s, 3H). LCMS (ES, M+H=245).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,59207-23-7, its application will become more common.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/106326; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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.127561-18-6, name is 1-(6-(Trifluoromethyl)pyridin-2-yl)piperazine, molecular formula is C10H12F3N3, molecular weight is 231.22, as common compound, the synthetic route is as follows.HPLC of Formula: C10H12F3N3

Add 4- (6-TRIFLUOROMETHYL-2-PYRIDYL) piperazine (46 mg, 0. 2 mmol) to a solution of 4- [6-CHLORO-2- (3-CHLOROPHENYL) PYRIMIDIN-4-YL] morpholine (62 mg, 0. 2 mmol), PD2 (dba) 3 (18 mg, 0. 02 MMOL), and BINAP (17 mg, 0. 02 mmol) in toluene (2 mL) under nitrogen, followed by t-BuOK (45 mg, 0. 4 mmol). Stir the mixture at 90C for 8 hours, dilute with aqueous ammonium chloride, and extract with EtOAc (3 x 10 mL). Dry (MGS04) the combined extracts and concentrate under reduced pressure. Purify the residue using flash chromatography on silica gel (50% hexane/50% ether) to give the title compound. MS 505 (M+ 1).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,127561-18-6, 1-(6-(Trifluoromethyl)pyridin-2-yl)piperazine, and friends who are interested can also refer to it.

Reference:
Patent; NEUROGEN CORPORATION; WO2005/7648; (2005); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem