Pyridine-derivatives

Application of 30563-98-5, 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 30563-98-5, name is Ethyl 5-nitropicolinate. This compound has unique chemical properties. The synthetic route is as follows.

A suspension of 5-nitro-pyridine-2-carboxylic acid ethyl ester (2.00 g, 10.2 mmol) and 10% Pd/C (200 mg) in ethanol (30 [ML)] was shaken under hydrogen at 40 psi for 4 h. The catalyst was filtered onto Celite and rinsed. The filtrate was concentrated in vacuo to give 1.47 g (87% yield) of a yellow solid, which displayed [A’H] NMR that matched the literature (Min, R. S.; Aksenov, V. S. [CITEZ.] [HETEROCYCL. COMPD. (ENGL. TRANSL.)] 1988,24, 885-886) and was used without any further purification.

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 30563-98-5, Ethyl 5-nitropicolinate.

Reference:
Patent; PFIZER INC.; WO2004/14904; (2004); A1;,
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 103041-38-9, name is Ethyl 3-(pyridin-2-ylamino)propanoate. This compound has unique chemical properties. The synthetic route is as follows. Formula: C10H14N2O2

obtained in Step 1 19.3g (0.098mol) of Compound 2 was added to the reaction flask was added 100ml of ethyl acetate, taking 22.8g (0.12mol) N-2 -B- alanine ethyl ester pyridine i.e. compound 3, was dissolved in 50ml of ethyl acetate was added to the reaction solution, 25 stirred for 12h, the solvent was distilled off under reduced pressure (vacuum degree: 0.075Mpa; temperature: 50 ) to give a solid, 65 deg.] C, and dried under vacuum 0.08Mpa 2h, was 28.9g3- [4-methoxy-3-methyl -N- (2- pyridyl) – benzamido] – acrylic acid ethyl ester, compound 4 in a yield of 80.7%

With the rapid development of chemical substances, we look forward to future research findings about 103041-38-9.

Reference:
Patent; Kaifeng Baiyun Pharmacy Limited Company; Lin, hengbiao; zhu, zanmei; mao, ying; liu, zhiqing; li, yunduo; (8 pag.)CN105481831; (2016); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 127978-70-5 , The common heterocyclic compound, 127978-70-5, name is (5-Methoxypyridine-2-yl)methanol, molecular formula is C7H9NO2, 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.

5-methoxypyridine-2-carbaldehyde: To a solution of 5.7g (41 mmol) (5-methoxypyridin-2~ yl)methanol in 100 mL CHC I3 was added 15g MnO2 and the mixture heated to reflux for 2 hours, filtered, and washed with boiling CHCI3. The filtrate was washed with brine, dried over MgSO4, and concentrated in vacuo to afford 5-methoxypyridine-2-carbaldehyde as a white solid. IH NMR (400MHz5 CDCl3) delta 9.99 (s, IH), 8.44 (d, J=2.4Hz, IH), 7.97 (d, J=8.4Hz, IH), 7.3 (dd, J=8.4, 2.4Hz, IH), 3.95 (s, 2H)

The synthetic route of 127978-70-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MERCK & CO., INC.; WO2007/120729; (2007); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 133427-07-3 ,Some common heterocyclic compound, 133427-07-3, molecular formula is C9H8N2O2, 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.

A mixture of imidazo[l,2-a]pyridine-8-carboxylic acid methyl ester (3.24 g, 18.3 mmol) and N-iodosuccinimide ( S) (4.11 g, 18.3 mmol) in acetonitrile (50 mL) is stirred at room temperature. After 2 hours, the reaction mixture is quenched with saturated aqueous Na2S2C>3 and extracted with EtOAc (3 x 100 mL). The combined organic layers are washed with water, brine, dried over Na2S04 and concentrated. The crude material is purified by silica gel chromatography eluting with 80% EtOAc in hexanes to afford 3-iodo-imidazo[l,2-a]pyridine-8-carboxylic acid methyl ester. Mp: 99-110C.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,133427-07-3, its application will become more common.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; COOK, Brian Nicholas; KUZMICH, Daniel; WO2011/56440; (2011); A1;,
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 65515-28-8, name is Methyl 2,6-dichloronicotinate. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C7H5Cl2NO2

[Example 24] Synthesis of 2-chloro-6-phenyl-nicotinic acid methyl ester To the mixture of 2,6-dichloro-nicotinic acid methyl ester (4.0 g, 19 mmol) synthesised in Example 23 and tetrahydrofuran (39 ml), phenyl boronic acid (2.5 g, 19 mmol), potassium carbonate (8.0 g, 58 mmol), and tetrakis(triphenylphosphine)palladium(0) (1.2 g, 0.97 mmol) were added, and the obtained reaction mixture was stirred for 16 hours while being heated to reflux. The reaction mixture was cooled to room temperature, and then insoluble matter was removed by filtration. The solvents were evaporated under reduced pressure from the filtrate, and then water and ethyl acetate were added to the obtained residue, followed by extraction. The organic layer and the aqueous layer were separated, and the aqueous layer was further extracted using ethyl acetate. The organic layers were mixed, washed with saturated saline, and dried using anhydrous sodium sulfate. The solvents were evaporated under reduced pressure, and the obtained residue was purified with silica gel column chromatography (heptane: ethyl acetate = 10:1 to 3:1). The obtained crude compound was recrystallized using the mixed solvent of heptane-diethyl ether, thereby obtaining the entitled compound (2.2 g, 47%). 1H-NMR Spectrum (CDCl3) delta(ppm): 3.98(3H, s), 7.46-7.53(3H, m), 7.74(1H, d, J=8.0Hz), 8.04-8.08(2H, m), 8.25(1H, d, J=8.0Hz)

With the rapid development of chemical substances, we look forward to future research findings about 65515-28-8.

Reference:
Patent; Eisai R&D Management Co., Ltd.; EP2062901; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 6345-27-3, 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. 6345-27-3, name is Isonicotinimidamide hydrochloride, molecular formula is C6H8ClN3, 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-3. 6-Methyl-2-(4-pyridinyl)-4-pyrimidinol — A mixture containing 15.8 g.of isonicotinamidine hydrochloride, 16.8 g. of sodium methoxide, 17 g. of ethyl acetoacetate and 100 ml. of ethanol was refluxed with stirring for seven hours and then evaporated to dryness. The residue was dissolved in water and the aqueous solution made acidic with acetic acid. The resultingsolution was collected, washed with water, dried and recrystallized from ethanol to yield 6.7 g. of 6-methyl-2-(4-pyridinyl)-4-pyrimidinol, m.p. 236 -238 C.

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 6345-27-3, Isonicotinimidamide hydrochloride.

Reference:
Patent; Sterling Drug Inc.; US3992380; (1976); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 1737-93-5, 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. 1737-93-5, name is 3,5-Dichloro-2,4,6-trifluoropyridine, molecular formula is C5Cl2F3N, 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.

General procedure: A mixture of commercially available 3,5-dichloro-2,4,6-(trifluoro)pyridine 1 (1 mmole), aryl boronic acids 2a-f (1.0 mmol), Pd(OAc)2 (2 mol %), x-phos (5 mol %) K3PO4 (1.5 mmole) were added into a solution of H2O/DMF (1:1) (2 mL) in pressure tubes. The reaction mixture was stirred at 60C temperature for 8-12 hrs. After completion of reaction (TLC controlled), the organic and aqueous layers were separated and the latter was extracted with CH2Cl2 (3×25 mL). The combined organic layers were dried (Na2SO4), filtered, and the filtrate was concentrated in vacuo. The product was purified by column chromatography (silica gel, EtOAc/heptane). All products were characterized by NMR, GC-MS, HRMS, and IR spectroscopic techniques.

According to the analysis of related databases, 1737-93-5, the application of this compound in the production field has become more and more popular.

Reference:
Article; Sharif, Muhammad; Shoaib, Khurram; Ahmed, Shahzad; Iqbal, Jamshed; Abilov, Zharylkasyn A.; Spannenberg, Anke; Langer, Peter; Tetrahedron Letters; vol. 57; 29; (2016); p. 3060 – 3062;,
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.1150618-36-2, name is 5-Bromo-3-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridine, molecular formula is C8H4BrF3N2, molecular weight is 265.03, as common compound, the synthetic route is as follows.Application In Synthesis of 5-Bromo-3-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridine

To a solution of 5-bromo-3-(trifluoromethyl)-lH-pyrrolo[2,3-b]pyridine (19 g, 72.3 mmol) in 1,4-dioxane (400 mL) was added potassium acetate (21.27 g, 220 mmol) and 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(l,3,2-dioxaborolane) (21.9 g, 86.7 mmol). The resulting mixture was degassed with nitrogen for 5 times, l, l’-bis(diphenylphosphino)ferrocene-palladium(n)dichloride (5.3 g, 7.23 mmol) was added and the mixture was degassed again. The reaction mixture was stirred at 80-90 C and overnight. The reaction mixture was poured into water, extracted with ethyl acetate (3 x 500mL), washed with brine, dried over sodium sulphate and concentrated to dryness in vacuo. The resulting residue was purified by column chromatography (silica gel, 100-200mesh, 10% to 20% ethyl acetate in petroleum ether) affording 5-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)-3-(trifluoromethyl)-lH- pyrrolo[2,3-b]pyridine (11.1 g, 49 %): NMR (400MHz, DMSO-d6), delta 12.62 (s, 1H), 8.58 (s, 1H), 8.21 (s, lH), 8.18 (s, 1H), 1.31 (s, 12H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1150618-36-2, 5-Bromo-3-(trifluoromethyl)-1H-pyrrolo[2,3-b]pyridine, and friends who are interested can also refer to it.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; GENENTECH, INC.; ESTRADA, Anthony; LIU, Wen; PATEL, Snahel; SIU, Michael; WO2014/111496; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 120277-39-6, 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 120277-39-6, name is (E)-3-(Pyridin-3-yl)prop-2-en-1-ol. This compound has unique chemical properties. The synthetic route is as follows.

[0366] Step C: [0367] To the solution of the crude product from Step B (0.5 g, 3.8 mmol) in CH2Cl2 (20 mL) was added MnO2 (2.5 g). The mixture was stirred at room temperature for 16 h. Filtration, concentration and purification by chromatography (silica gel, 98:2 dichloromethane/methanol) gave 0.37 g (42percent) of the title compound as white solid MS134 (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 120277-39-6, (E)-3-(Pyridin-3-yl)prop-2-en-1-ol.

Reference:
Patent; Henninger, Todd C.; Macielag, Mark J.; Marinelli, Brett A.; Zhu, Bin; US2004/18994; (2004); 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.59237-53-5, name is Methyl 6-chloro-5-nitronicotinate, molecular formula is C7H5ClN2O4, molecular weight is 216.58, as common compound, the synthetic route is as follows.Application In Synthesis of Methyl 6-chloro-5-nitronicotinate

A stirred solution of commercially available methyl 6-chloro–nitronicotinate (1.0 g,4.62 mmol) in THF (20 mL) was degassed with N2, and then ethynyltrimethylsilane (0.544 g, 5.54 mmol), Pd(PPh3)2C12 (0.324 g, 0.46 mmol), CuT (0.017 g, 0.089 mmol) and triethylamine (10 mL) were added sequentially. The resulting reaction mixture was heated at 80 oC for 3 h. Completion of the reaction was monitored by TLC and LCMSafter which the reaction mixture was diluted with water and extracted with EtOAc. The combined organics were washed with brine solution, dried over anhydrous Na2SO4 and concentrated under reduced pressure to give the crude product which was purified by column chromatography to provide titled compound (o.6 g, 46.6percent yield and purity 98percent) as an oily liquid. LCMS m/z: 279 [M+H].

At the same time, in my other blogs, there are other synthetic methods of this type of compound,59237-53-5, Methyl 6-chloro-5-nitronicotinate, and friends who are interested can also refer to it.

Reference:
Patent; CURADEV PHARMA LIMITED; BANERJEE, Monali; MIDDYA, Sandip; BASU, Sourav; GHOSH, Rajib; PRYDE, David; YADAV, Dharmendra; SHRIVASTAVA, Ritesh; SURYA, Arjun; (290 pag.)WO2018/234808; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem