Pyridine-derivatives

Synthetic Route of 53937-02-3, 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. 53937-02-3, name is 4-Benzyloxy-2-(1H)-pyridone. A new synthetic method of this compound is introduced below.

c) 4-(Benzyloxy)- 1 -( 1 -(2-(pyrrolidin- 1 -yl)ethyl)- lNo.-indazol-5-yl)pyridin-2( lNo.)-one; Chemical Formula C25H26N4O2Exact Mass 414 21 Molecular Weight 414 5 [0081] A suspension of 5-bromo-l-(2-(pyrrolidin-l-yl)ethyl)-lH-indazole (0 21 g, 0.70 mmol) in 1,4-dioxane (10 mL) stirred under nitrogen was treated sequentially with 4- (benzyloxy)pyridin-2(li/)-one (0.14 g, 0.70 mmol), trans- 1,2-diaminocyclohexane (0.03 mL, 0.2 mmol), CuI (28 mg, 0.15 mmol) and K2CO3 (0.19 g, 1 4 mmol). After stirring overnight at 1100C, the mixture was allowed to cool to room temperature, diluted with CH2Cl2, washed with brine, dried over Na2SO4, filtered and concentrated to dryness. Purification by flash column chromatography (silica gel, CH2Cl2/Me0H, 95:5 to 90: 10) gave the title compound (21 mg, 7%) as an off-white powder 1H NMR (500 MHz, DMSO-J6) delta 8.03 (s, IH), 7.66 (d, J = 1.4 Hz, IH), 7.53 (d, J = 8.8 Hz, IH), 7.43-7.36 (m, 6H), 7.28 (d, J = 7.5 Hz, 1 H), 6.09-6.06 (m, 2H), 5.06 (s, 2H), 4.58-4.55 (m, 2H), 3.03 (br m, 2H), 2 61 (br m, 4H), 1.81 (br m, 4H); ESI MS m/z 415 [M + H]+

At the same time, in my other blogs, there are other synthetic methods of this type of compound,53937-02-3, 4-Benzyloxy-2-(1H)-pyridone, and friends who are interested can also refer to it.

Reference:
Patent; AMR TECHNOLOGY, INC.; WO2008/86404; (2008); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 17282-40-5, 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.17282-40-5, name is 1-(2-Ethoxy-2-oxoethyl)pyridin-1-ium bromide, molecular formula is C9H12BrNO2, molecular weight is 246.1011, as common compound, the synthetic route is as follows.

General procedure: Mixture of ethyl acetoacetate(1, 211 mg, 0.153 mmol), hydrazine (2, 81 mg, 0.153), 7-hydroxy-4-oxo-2-phenyl-4H-chromene-8-carbaldehyde (4a, 406 mg,0.153 mmol), 1-(2-ethoxy-2-oxoethyl)pyridinium ylide (4, 272mg, 0.153 mmol), 0.1 equivalents of trimethylamine (16 mg,0.015 mmol) in15 mL EtOH were refluxed in a pre-heated oilbath (80 C) under the blanket of nitrogen for 30 min till the completion of reaction (TLC, 20 % dicholromethane in hexanes; Rf = 0.3). The reaction mixture was diluted with dichloromethane (10 mL) and the organic solution was washed with water (20 mL) and brine (20 mL) and dried over anhydrousNa2SO4. Column chromatographic purification on silica gelwith increasing amount of dichlormethane in hexanes provided 8a as a free flowing solid in about 88 % yield. Analytical samples were obtained through from the recrystallization in EtOH.

Statistics shows that 17282-40-5 is playing an increasingly important role. we look forward to future research findings about 1-(2-Ethoxy-2-oxoethyl)pyridin-1-ium bromide.

Reference:
Article; Tangeti, Venkata Swamy; Vasundhara; Satyanarayana; Pavan Kumar, Kaja Srinivas; Asian Journal of Chemistry; vol. 29; 7; (2017); p. 1525 – 1532;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 17282-40-5, 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 17282-40-5, name is 1-(2-Ethoxy-2-oxoethyl)pyridin-1-ium bromide. This compound has unique chemical properties. The synthetic route is as follows.

General procedure: A mixture of the corresponding nitroethylene (5 mmol),ethoxycarbonylmethylpyridinium bromide [28] (7.5 mmol), andtriethylamine (15 mmol) in dry acetonitrile (40 mL) was stirred at60 C for 4-5 h (TLC control). Acetonitrile was removed in vacuo, and then methylene chloride (150 mL) was added. The methylenechloride extract was washed with water, 5% aqueous HCl, wateruntil pH 7, and dried by filtration through cotton wool. Methylenechloride was removed in vacuo and the residue was triturated inethanol. The collected crystals werewashed with ethanol and driedin air to obtain a 4,5-dihydroisoxazole 2-oxides 8. When crystallizationwas unavailable, 4,5-dihydroisoxazole 2-oxides 8 were isolatedby column chromatography. For each compound, theappropriate conditions are specified.

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 17282-40-5, 1-(2-Ethoxy-2-oxoethyl)pyridin-1-ium bromide.

Reference:
Article; Chernysheva, Natalia B.; Maksimenko, Anna S.; Andreyanov, Fedor A.; Kislyi, Victor P.; Strelenko, Yuri A.; Khrustalev, Victor N.; Semenova, Marina N.; Semenov, Victor V.; European Journal of Medicinal Chemistry; vol. 146; (2018); p. 511 – 518;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 98273-19-9, 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. 98273-19-9, name is Methyl 4,6-dichloropicolinate. A new synthetic method of this compound is introduced below.

To a solution of methyl 4,6- dichloropyridine-2-carboxylate (1.0 g, 4.9 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.34 g, 0.29 mmol) in THF (11 mL) was added bromo(cyclopropyl)zinc (11 mL of 0.5 M solution in THF, 5.6 mmol). The solution was heated at 60-65 C for 24 h. The solution was allowed to cool to rt, then poured into saturated aqueous ammonium chloride and extracted with EtOAc. The combined organic phases were dried, filtered and concentrated onto Celite. Purification was by silica gel chromatography using 0-15% EtO Ac/hex to afford the title compound (600 mg) as a colorless solid.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,98273-19-9, Methyl 4,6-dichloropicolinate, and friends who are interested can also refer to it.

Reference:
Patent; NURIX THERAPEUTICS, INC.; BARSANTI, Paul A.; BENCE, Neil F.; GOSLING, Jennifa; SAHA, Anjanabha; TAHERBHOY, Asad M.; ZAPF, Christoph W.; BOYLE, Kathleen; CARDOZO, Mario; MIHALIC, Jeffrey; LAWRENZ, Morgan; GALLOP, Mark; BRUFFEY, Jilliane; CUMMINS, Thomas; ROBBINS, Daniel; TANAKA, Hiroko; WANG, Chenbo; COHEN, Frederick; PALMER, Wylie; SANDS, Arthur T.; SHUNATONA, Hunter; (968 pag.)WO2019/148005; (2019); 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. 800401-67-6, name is Ethyl 5-chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylate, the common compound, a new synthetic route is introduced below. Quality Control of Ethyl 5-chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylate

To a solution of 2-(thietan-3-yl)ethanol (200 mg, 1.69 mmol), tris(butyl)phosphine (6.84g, 10% in hexane, 3.38 mmol) and 1 , l ‘-(azodicarbonyl)dipiperidine (860 mg, 3.38 mmol) in anhydrous tetrahydrofuran (20 mL) was added ethyl 5-chloro-lH-pyrrolo[2,3-c]pyridine-2- carboxylate (380 mg, 1.69 mmol) under nitrogen atmosphere. The reaction mixture was stirred at room temperature for 3 hours. The resulting mixture was then concentrated in vacuo. The residue was purified by flash column (gradient eluting with 0 – 25% ethyl acetate in petroleum ether) to afford 400 mg of ethyl 5-chloro-l-[2-(thietan-3-yl)ethyl]-lH-pyrrolo[2,3-c]pyridine-2- carboxylate as a white solid.

The synthetic route of 800401-67-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; FENG, Song; GAO, Lu; GUO, Lei; HUANG, Mengwei; LIANG, Chungen; WANG, Baoxia; WANG, Lisha; WU, Guolong; YUN, Hongying; ZHANG, Weixing; ZHENG, Xiufang; ZHU, Wei; WO2014/184163; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 58530-53-3, 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. 58530-53-3, name is 2,4-Dibromopyridine, molecular formula is C5H3Br2N, 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.

Example 23 Synthesis of 1,1″-dihexyl-[4,2′:4′,4″-terpyridine]-1,1″-diium bis(tetrafluoroborate) A mixture of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (4.64 g, 22.6 mmol), 2,4-dibromopyridine (2.44 g, 10 mmol), Pd(PPh3)4 (0.59 g, 0.51 mmol, 5 mol %) and K2CO3 (3.12 g, 22.6 mmol) in degassed EtOH (50 mL) and PhMe (50 mL) under N2 was heated at reflux for 5 days, cooled, diluted with water (100 mL) and extracted with dichloromethane (4*75 mL). The dried (anhydrous sodium sulfate) solvent was removed in vacuo and the resulting brown powder chromatographed on silica, eluting with 5-10% MeOH in ethyl acetate. The solvent was removed to yield 4,2′:4′,4″-terpyridine as an off-white solid (2.07 g, 88.7%).

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 58530-53-3, 2,4-Dibromopyridine.

Reference:
Patent; Essilor International; ARCHAMBEAU, Samuel; BIVER, Claudine; BERIT-DEBAT, Fabien; AIKEN, Stuart; GABBUTT, Christopher David; HERON, Bernard Mark; BROADBENT, Thomas David; (37 pag.)US2018/194995; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 7598-35-8, 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. 7598-35-8, name is 2-Bromopyridin-4-amine, molecular formula is C5H5BrN2, 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.

[0100] Preparation 6: 3′-fluoro-6′-methyl-2,2′-bipyridin-4-amine[0101] 2-Bromopyridin-4-amine (9 g, 52.0 mmol) and N,N-dimethylpyridin-4-amine (0.636 g, 5.20 mmol) were dissolved in dichloroethane (100 mL) and a solution of phthaloyl dichloride (10.11 ml, 52.0 mmol) in dichloroethylene (20.0 mL) was added dropwise at room temperature. The reaction was stirred for 1 hour and partitioned between saturated bicarbonate and dichloromethane. The organics were separated and dried over Na2S04, filtered, and evaporated to give a solid. The solid was purified by silica columnchromatography in eluting with a gradient of methanol (0-15%) in dichloromethane/ to afford product solid which was triturated with methanol and heated briefly to afford the title compound (4.8g) as an off white solid. 1H NMR (400 MHz, DMSO-d6) ppm 7.69 (dd, J=5.31, 1.77 Hz, 1 H) 7.86 (d, J=1.77 Hz, 1 H) 7.91 – 7.98 (m, 2 H) 7.99 – 8.08 (m, 2 H) 8.57 (d, J=5.56 Hz, 1 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 7598-35-8, 2-Bromopyridin-4-amine.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; KWOK, Lily; LARSON, John David; SABAT, Mark; WO2011/146287; (2011); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 614750-84-4, 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.614750-84-4, name is 6-Iodo-[1,2,4]triazolo[1,5-a]pyridine, molecular formula is C6H4IN3, molecular weight is 245.02, as common compound, the synthetic route is as follows.

To a solution of 6-iodo[l,2,4]triazolo[l,5-a]pyridme (5 g, 0.02 mol, prepared according to literature procedure) in anhydrous THF (300 mL), was slowly added IM of isopropylmagnesium bromide in THF (31 mL, 0.03 mol) at 0 oC. It was stirred at OoC for 1 hour and then was added anhydrous DMF (6 mL, 0.05 mol). It was allowed to warm to room temperature and stirred for overnight. It was then quenched with 100 mL of water and worked up with diethyl ether and saturated NaHCO3. Dried over MgSO4 and concentrated. The residue was purified on silica gel column with EtOAc to give the desire product as a tan solid (3g, 100percent). LC-MS/ES+: M+l: 148.0.

Statistics shows that 614750-84-4 is playing an increasingly important role. we look forward to future research findings about 6-Iodo-[1,2,4]triazolo[1,5-a]pyridine.

Reference:
Patent; BIOGEN IDEC MA INC; WO2006/26305; (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.1215387-58-8, name is 5-Bromo-1H-pyrrolo[2,3-c]pyridine, molecular formula is C7H5BrN2, molecular weight is 197.03, as common compound, the synthetic route is as follows.Application In Synthesis of 5-Bromo-1H-pyrrolo[2,3-c]pyridine

To a stirred suspension of 60% NaH (0.146 g, 6.091 mmol) in DMF (20 mL), 5-bromo-1 H-pyrrolo[2,3-c]pyridine (0.8 g, 4.06 mmol) was added at 0 C and stirred for 15 min. Then, 1-bromo butane (0.66 g, 4.873 mmol) was added to the reaction mixture at 0 C. The resulting mixture was allowed to warm to rt and stirred for 16 h. The reaction mixture was quenched with water and extracted EtOAc and the organic layer was dried over anhydrous Na2S04, and it was concentrated under reduced pressure. The crude compound was purified by flash column chromatography using 10% EtOAc in pet ether as an eluent to afford the title compound (0.78 g, 67%). LC-MS (method 2): Rt =2.27 min; m/z = 253.17 (M+H+).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1215387-58-8, 5-Bromo-1H-pyrrolo[2,3-c]pyridine, and friends who are interested can also refer to it.

Reference:
Patent; ORYZON GENOMICS, S.A.; CARCELLER GONZALEZ, Elena; ORTEGA MUNOZ, Alberto; SALAS SOLANA, Jorge; (103 pag.)WO2019/110663; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 1628-89-3, 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. 1628-89-3, name is 2-Methoxypyridine. A new synthetic method of this compound is introduced below.

General procedure: To a stirred cooled (0 C) solution of 2,2,6,6-tetramethylpiperidine (1.0 mL, 6.0 mmol) in THF (5 mL) were added BuLi (1.6 M hexanes solution, 6.0 mmol) and, 5 min later, FeBr2 (0.43 g, 2.0 mmol). The mixture was stirred for 15 min at 0 C before introduction of the substrate (2.0 mmol). After 2 h at room temperature, the electrophile (6.0 mmol) was added. The mixture was stirred for 1 h before addition of H2O (10 mL) and extraction with EtOAc (3×20 mL). The combined organic layers were dried over MgSO4, filtered, and concentrated under reduced pressure.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1628-89-3, its application will become more common.

Reference:
Article; Nagaradja, Elisabeth; Chevallier, Floris; Roisnel, Thierry; Jouikov, Viatcheslav; Mongin, Florence; Tetrahedron; vol. 68; 14; (2012); p. 3063 – 3073;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem