Heterocyclic Building Blocks-Naphthyridine

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.17965-71-8,3-Bromo-1,5-naphthyridine,as a common compound, the synthetic route is as follows.,17965-71-8

To a solution of 1.00 g of 3-bromo-1,5-naphthyridine in 5 mL of 1,4-dioxane, 0.67 g of tert-butylcarbamate, 2.18 g of cesium carbonate, 44 mg of tris(benzylideneacetone)dipalladium and 83 mg of 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene were added, and the mixture was stirred at 80C for 12.5 hours under an argon atmosphere. Water and chloroform were added to the reaction mixture, and the organic layer was separated. The organic layer was washed with a saturated aqueous sodium chloride solution, and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The resultant residue was purified by silica gel column chromatography using silica gel; Silica Gel 60N made by KANTO CHEMICAL CO., INC., and an eluent of chloroform:methanol 10:1 to obtain 1.03 g of tert-butyl 1,5-naphthyridin-3-ylcarbamate as a yellow oily substance. 1H-NMR (DMSO-d6) delta: 1.53 (9H, s), 7.60-7.65 (1H, m), 8.32 (1H, d, J = 4.1 Hz), 8.52 (1H, s), 8.90-8.93 (1H, m), 8.97-9.00 (1H, m), 10.08 (1H, s)

As the paragraph descriping shows that 17965-71-8 is playing an increasingly important role.

Reference£º
Patent; TOYAMA CHEMICAL CO., LTD.; Taisho Pharmaceutical Co. Ltd.; EP2022793; (2009); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

72754-05-3, 6-Bromo-1,8-naphthyridin-2-ol is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,72754-05-3

Step 1: To a stirred solution of 6-bromo-1,8-naphthyridin-2(1H)-one (1 equiv) in DIVIF (0.2 M) at 25 C were added cesium carbonate (1.3 equiv) and iodoethane (1.1 equiv) and the reaction was stirred for 30 mm. The mixture was poured onto water and extracted three times with ethyl acetate. The combined organics were washed with water and brine, dried over MgSO4, filtered, and concentrated to give 6-bromo-1-ethyl-1,8-naphthyridin-2(1H)-one as a yellow solid in 87% yield, which was used without further purification. LCMS (m/z) (M+H) = 253.0/255.0, Rt = 0.91 mm

As the paragraph descriping shows that 72754-05-3 is playing an increasingly important role.

Reference£º
Patent; NOVARTIS AG; AVERSA, Robert John; BURGER, Matthew T.; DILLON, Michael Patrick; DINEEN JR., Thomas A.; KARKI, Rajesh; RAMURTHY, Savithri; RAUNIYAR, Vivek; ROBINSON, Richard; SARVER, Patrick James; (374 pag.)WO2017/103824; (2017); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.100361-18-0,7-Chloro-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic Acid,as a common compound, the synthetic route is as follows.,100361-18-0

Acetonitrile (100ml), 3-aminomethyl-4-methoxyiminopyrrolydine dimethanesulfonate (12. 5g) and 1-naphthaldehyde (11. lg) were in turn introduced into a reaction vessel at room temperature and cooled to 0~5 C. Triethylamine (12.2g) was dropwise added to the reaction mixture. After stirring the mixture for about 0. 5h, the reaction mixture was diluted by adding ethanol (30ml). 7-Chloro-l-cyclopropyl-6-fluoro-1, 4-dihydro-4-oxo- 1, 8-naphthyridine-3-carboxylic acid (lO. Og) was introduced to the reaction mixture. After raising slowly the reaction temperature to room temperature, the reaction mixture was stirred for about 15h. The title compound in the form of solid was filtered, washed with water and ethanol, and dried to prepare 15.7 g of the title compound (Yield: 84. 4%). 1H NMR (o, CDCl3) : 8.86 (m, 2H), 8.55 (s, 1H), 7. 82 (m, 3H), 7.73 (m, 1H), 7.40 (m, 3H), 4.60 (m, 2H), 4.24 (m, 2H), 4.08 (m, 1H), 3.99 (m, 1H), 3.95 (s, 3H), 3.45 (m, 2H), 1.13 (m, 2H), 0. 89 (m, 2H) Mass (FAB): 528 (M+H)

100361-18-0 7-Chloro-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic Acid 11055142, anaphthyridine compound, is more and more widely used in various fields.

Reference£º
Patent; LG LIFE SCIENCES LTD.; WO2003/87100; (2003); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

1309774-03-5, 7-Bromo-2-chloro-1,5-naphthyridine is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,1309774-03-5

0398-2 A mixture of 7-bromo-2-chloro-1,5-naphthyridine (50 mg), bis(pinacolato)diboron (62 mg), (1,1′-bis(diphenylphosphino)ferrocene)palladium(II) dichloride (16 mg), potassium acetate (40 mg), and 1,4-dioxane (2 mL) was stirred at 80 C. for 2 hours in a nitrogen atmosphere. 3-(4-Iodo-1H-pyrazol-1-yl)pyridine (61 mg), sodium carbonate (43 mg), bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (17 mg), and water (0.2 mL) were added thereto, followed by stirring at 80 C. for 8 hours. The reaction mixture was cooled to room temperature, the insolubles were filtered off using celite, and the solvent was distilled off under reduced pressure. The obtained residue was purified by silica gel column chromatography (methanol-ethyl acetate-hexane), thereby obtaining 2-chloro-7-(1-(pyridin-3-yl)-1H-pyrazol-4-yl)-1,5-naphthyridine (27 mg). MS m/z (M+H): 308.

As the paragraph descriping shows that 1309774-03-5 is playing an increasingly important role.

Reference£º
Patent; FUJIFILM Corporation; FURUYAMA, Hidetomo; KURIHARA, Hideki; TERAO, Takahiro; NAKAGAWA, Daisuke; TANABE, Shintaro; KATO, Takayuki; YAMAMOTO, Masahiko; SEKINE, Shinichiro; MASHIKO, Tomoyuki; INUKI, Shinsuke; UEDA, Satoshi; US2015/322063; (2015); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.17965-71-8,3-Bromo-1,5-naphthyridine,as a common compound, the synthetic route is as follows.

Example 251; The compound obtained in Example 250 (50 mg) was dissolved in acetonitrile (1.5 ml), the solution was added with 3-bromo-1,5- naphthyridine (21.1 mg) obtained by the method described in the literature (Journal of Organic Chemistry, 1968, vol.

17965-71-8, The synthetic route of 17965-71-8 has been constantly updated, and we look forward to future research findings.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.100491-29-0,Ethyl 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate,as a common c

A. 1.1 g (12.8 mmol) of pivalaldehyde are added to 0.86 g (10 mmol) of 3-amino-pyrrolidine at room temperature and after 1 hour the mixture is diluted with 20 ml of acetonitrile and 10 ml of dimethylformaldehyde. 1.1 g (10 mmol) of 1,4-diazabicyclo-[2.2.2

As the paragraph descriping shows that 100491-29-0 is playing an increasingly important role.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.215523-34-5,1,8-Naphthyridine-2-carboxylic acid,as a common compound, the synthetic route is as follows.

To a suspension of 1,8-naphthyridine-2-carboxylic acid (2?g, 0.011?mol) in dry benzene (50?mL), was added oxalyl chloride (1.4?mL, 0.017?mol) drop wisely at 0?C. Then few drops of DMF were added and the reaction began immediately. It was then slowly broug

215523-34-5, The synthetic route of 215523-34-5 has been constantly updated, and we look forward to future research findings.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1309774-03-5,7-Bromo-2-chloro-1,5-naphthyridine,as a common compound, the synthetic route is as follows.

Example 0646 0646-1 A mixture of 7-bromo-2-chloro-1,5-naphthyridine (5.0 g), 1-tert-butoxycarbonyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazole (6.04 g), sodium carbonate (4.4 g), bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropallad

As the paragraph descriping shows that 1309774-03-5 is playing an increasingly important role.

254-79-5, 1,5-Naphthyridine is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,254-79-5

1,5-naphthyridine (111.6 g, 0.85 mol) was dissolved in acetic acid (1000 mL), sodium acetate (140.9 g, 1.72 mol) was added and heated to 80 C.A solution of bromine (153 g, 0.96 mol) in 150 mL was added dropwise thereto, maintaining the temperature of the

As the paragraph descriping shows that 254-79-5 is playing an increasingly important role.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1309774-03-5,7-Bromo-2-chloro-1,5-naphthyridine,as a common compound, the synthetic route is as follows., Author tianliPosted on September 25, 2020Categories 1309774-03-5, naphthyridineTags M.W:200-300