Month: August 2020

15992-83-3, 1,8-Naphthyridin-2-amine is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Preparation of 2-(1,8-naphthyridin-2-yl)phthalimide (8.6 g.), m.p. 250 C., by reacting 2-amino-1,8-naphthyridine (9.9 g.) with phthalic anhydride (10.2 g.) in dimethylformamide (75 cc.) at 150 C. for 1 hour 30 minutes.

15992-83-3 1,8-Naphthyridin-2-amine 4173048, anaphthyridine compound, is more and more widely used in various.

Reference£º
Patent; Rhone-Poulenc S.A.; US4016274; (1977); A;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

15992-83-3, 1,8-Naphthyridin-2-amine is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Part II- Synthesis of 2,6-Difluoro-N-[1,8]naphthyridin-2-ylbenzamide; [1,8]-Naphthyridin-2-ylamine (85 mg, 0.59 mmol) was dissolved in dichloromethane(2 mL) and pyridine (0.10 mL, 1.2 mmol). 2,6-Difluorobenzoyl chloride (0.068 mL, 0.76mmol) was then added and the reaction mixture was stirred at room temperature for 30 minutes. Next, the reaction mixture was diluted with ethyl acetate and washed with water followed bybrine. The resulting organic solution was purified by column chromatography (EtOAc/hexanes) to give 2,6-difluoro-N-[1,8]naphthyridin-2-ylbenzamide. Yield 35 mg (21 %).LCMS (ESI): calc. C1sH9FzN30 = 285; obs. M+H = 286.

The synthetic route of 15992-83-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; LYCERA CORPORATION; AICHER, Thomas, Daniel; TOOGOOD, Peter, L.; HU, Xiao; WO2013/169864; (2013); A2;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

17965-71-8, 3-Bromo-1,5-naphthyridine is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution of 3-bromo-l,5-naphthyridine (C-2) (4.181 g, 20.0 mmol, 1.0 eq ) in 1,4-dioxane (100 mL), tert-butylcarbamate (2.812 g, 24.0 mmol, 1.2 eq), cesium carbonate (9.132 g, 28.0 mmol, 1.4 eq), tris(benzylideneacetone)dipalladium (183 mg, 0.20 mmol, 0.01 eq) and Xantphos (347 mg, 0.60 mmol, 0.03 eq) were added. The mixture was heated at reflux for 16 h under an argon atmosphere. After the reaction mixture was cooled to RT, it was diluted with water (300 mL) and extracted with ethyl acetate (3 x 100 mL). The combined organic layers were washed with brine (200 mL), dried over Na2S04 and filtered. The filtrate was concentrated in vacuo. The resultant residue was purified by silica gel column chromatography (15 – 25%o ethyl acetate- petroether) to afford the desired product, tert-butyl l,5-naphthyridin-3-ylcarbamate (D-12) (4.047 g, 82.5% yield) as a yellow oil. ‘H NMR (300 MHz, DMSO-Patent; INTELLIKINE, INC.; REN, Pingda; LIU, Yi; LI, Liansheng; CHAN, Katrina; WILSON, Troy, Edward; CAMPBELL, Simon, Fraser; WO2011/149937; (2011); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

17965-71-8, 3-Bromo-1,5-naphthyridine is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a stirred solution of 3-bromo-l,5-naphthyridine (C-2) (35.6 g, 170 mmol, 1.0 eq) in dichloromethane (300 mL) at 0C was added w-chloroperbenzoic acid (35.27 g, 204 mmol, 1.2 eq) in portions. The resulting mixture was stirred for lh at RT. The reaction was complete based on TLC analysis. The reaction mixture was washed with saturated Na2S03 solution and saturated NaHC03 solution sequentially, and then washed with brine, dried over Na2S04 and filtered. The filtrate was concentrated in vacuo and the residue was purified by column chromatography on silica gel (1-5% MeOH-DCM) to afford the desired product 3-bromo-l,5-naphthyridine-5-oxide (C-3) (28.35 g, 74% yield). ‘H NMR (300 MHz, CDCl3-Patent; INTELLIKINE, INC.; REN, Pingda; LIU, Yi; LI, Liansheng; CHAN, Katrina; WILSON, Troy, Edward; CAMPBELL, Simon, Fraser; WO2011/149937; (2011); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

197507-59-8, 1,6-Naphthyridine-2-carboxylic acid is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution OF 4- [ (4-BROMOPHENYL) (ethoxyimino) methyl]-1- (4-methyl-4-piperidinyl)- piperidine (50mg, 0. 12MMOL), 1, 6-naphthyridine-2-carboxylic acid (25mg, 0. 14MMOL), Et3N (44 mg, 0. 43MMOL) in DMF (3 mL, anhydrous) was added HATU (60mg, 0. 16MMOL) at room temperature. After 16 h the reaction mixture was poured into ice water, and the solid was collected by filtration. The solid was dissolved in CH2CI2, and dried over NA2SO4. CONCENTRATION in vacuo, and purification by preparative TLC (CH2CI2-MEOH, 9: 1) afforded the title compound as a light yellow powder. MS: 564 (M+).

As the paragraph descriping shows that 197507-59-8 is playing an increasingly important role.

Reference£º
Patent; SCHERING AKTIENGESELLSCHAFT; WO2004/113323; (2004); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

100491-29-0, Ethyl 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Ethyl 7-chloro-1-(2,4-difluorophenyl)-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate (1) (7.82 g, 0.02 mol) in 10% HCl (100 mL) was refluxed at 100 C for 3h. The reaction mixture was cooled down, diluted with 100 ml of H2O and adjusted to pH=7 by addition of ammonia (33%). The product was filtered off, dried and recrystallized from EtOH.

The synthetic route of 100491-29-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Gencer, Huelya Karaca; Levent, Serkan; Acar Cevik, Ulviye; Oezkay, Yusuf; Ilg?n, Sinem; Bioorganic and Medicinal Chemistry Letters; vol. 27; 5; (2017); p. 1162 – 1168;,
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.254-79-5,1,5-Naphthyridine,as a common compound, the synthetic route is as follows.

Example 12; 220 221 222Part A: To a solution of compound 220 (1.0Og, 6.02 mmol) in carbon tetrachloride (60 ml_) was added dropwise, bromine (1.15 g, 7.20 mmol) as a carbon tetrachloride solution (6 mL). The resulting solution was refluxed for 1 hour. Pyridine (0.5 ml_, 6.0 mmol) as a carbon tetrachloride solution (10 mL) was added over a period of 1 hour to the refluxing reaction mixture. The reaction was stirred at reflux for 16 hours at which time LC-MS indicated that the reaction was complete. The reaction mixture was cooled to room temperature, resulting in the formation of a precipitate, which was filtered. The carbon tetrachloride filtrate was set aside. The collected brown solid was taken up in 10% NaOH (100 mL) and stirred at room temperature for 1 hour. This solution was extratcted with chloroform. The chloroform and carbon tetrachloride solutions were combined and concentrated in vacuum. Purification by column chromatography (Sitheta2, 20% EtOAc / DCM) afforded compound 221 as a white solid 0.17 g, (14%). 1H NMR (400 MHz, DMSO-d6) delta 9.07 (d, 1 H), 9.02 (dd, 1 H), 8.74 (m, 1 H), 8.45 (m, 1 H), 7.83 (dd, 1 H).

254-79-5 1,5-Naphthyridine 136070, anaphthyridine compound, is more and more widely used in various.

Reference£º
Patent; SCHERING CORPORATION; WO2008/82487; (2008); A2;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

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

3-Bromo-1,5-naphthyridine (5) To a stirring solutionof compound 4 (2.7 g, 20.76 mmol) and NaOAc(3.41 g,41.52 mmol) in 10 mL glacial AcOH at 85C was added a solution of Br2 (1 M) in AcOH (35 mL) for 5 h,then cooled to room temperature and concentrated in vacuum to remove AcOH.Purification by chromatography (PE/EA = 2:1) provided compound 5 (2.36 g, 55%) as a whitesolid. MP: 107~108C (Ref.2 108~109C).1H NMR (400 MHz,CDCl3): delta 8.96 (d, J = 2.1 Hz, 2H), 8.56 (s, 1H), 8.36 (d, J = 8.5 Hz, 1H), 7.69-7.56 (m, 1H).

254-79-5 1,5-Naphthyridine 136070, anaphthyridine compound, is more and more widely used in various.

Reference£º
Article; Wu, Jing-Fang; Liu, Ming-Ming; Huang, Shao-Xu; Wang, Yang; Bioorganic and Medicinal Chemistry Letters; vol. 25; 16; (2015); p. 3251 – 3255;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

254-60-4, 1,8-Diazanaphthalene is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step D Preparation of 3-(5,6,7,8-tetrahydro-[1,8]-naphthyridin-2-yl)-N-Boc-propylamine (1-5) A solution of naphthyridine 1-4 (2.72 g) in methanol (20 mL) was hydrogenated in the presence of 5% rhodium on carbon (2.1 g; containing 63% of water) under 40 psi of hydrogen at 5 C. for 10 hours. The catalyst was filtered through Solka Flok and washed with methanol (25 mL twice). The filtrate and washings were combined, concentrated in vacuo, and dissolved in methanol (6.8 mL). To the solution was added water (6.8 mL) slowly at ambient temperature. The resulting solid was collected by filtration, washed with a mixture of water and methanol (2:1; 5 mL), and dried under vacuum to give the desired crystalline tetrahydronaphthyridine 1-5 (1.9 g). The mother liquor yielded an additional 5% of 1-5; m.p. 95.2-96.3 C. 1H NMR (400 MHz; CDCl3): delta 7.05 (d, J=7.4 Hz, 1H), 6.33 (d, J=7.3 Hz, 1H), 5.45 (bs, 1H), 4.92 (bs, 1H), 3.39 (m, 2H), 114 (s, 9H); J=7.3, 2H), 1.89 (m, 2H), 1.83 (m, 2H), 1.44 (s, 9H); 13C NMR (101 MHz; CDCl3): delta157.1, 156.0, 155.4, 136.7, 113.4, 111.3, 78.6, 41.4, 40.3, 35.0, 29.4, 28.4, 26.2, 21.3.

The synthetic route of 254-60-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Merck & Co., Inc.; US6423845; (2002); B1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem

254-60-4, 1,8-Diazanaphthalene is a naphthyridine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A. A solution of [1,8]naphthyridine (0.2 mmol) and potassium amide (0.8 mmol) in liquid ammonia (20 mL) is stirred at -40 C. for 3 h. The solution is concentrated. Residue is partitioned between EtOAc and water. EtOAc layer is separated and washed successively with water and brine. EtOAc layer is dried over sodium sulfate, filtered and concentrated to give [1,8]naphthyridin-2-ylamine which is used as is for the next step.

As the paragraph descriping shows that 254-60-4 is playing an increasingly important role.

Reference£º
Patent; Calvo, Raul R.; Cheung, Wing S.; Player, Mark R.; US2006/116368; (2006); A1;,
1,8-Naphthyridine – Wikipedia
1,8-Naphthyridine | C8H6N2 – PubChem