Month: November 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.141-30-0,3,6-Dichloropyridazine,as a common compound, the synthetic route is as follows.

To 3,6-dichloropyridazine (4g, 26.8mniol) and sodium iodide (5.4g, 35.9mmol) was added hydriodic acid (20ml) and the mixture was heated to 400C for 18 hours. After cooling to room temperature the material was poured onto ice and stirred in a beaker (500ml). The aqueous acid was basified (pH>12) by addition of sodium hydroxide (cone, 15ml) and water (20ml). Dichloromethane (40ml) was added to the aqueous and collected. The dichloromethane layer was then dried filtered and evaporated to obtain the title compound as a brown solid (6.3g).1H-NMR (CDCl3) delta 7.21 (IH, d, J = 9), 7.82 (IH, d, J= 8)LC/MS m/z [MH+] 241 consistent with molecular formula C4H235Cl127IN2, 141-30-0

141-30-0 3,6-Dichloropyridazine 67331, apyridazine compound, is more and more widely used in various fields.

Reference£º
Patent; GLAXO GROUP LIMITED; WO2008/116816; (2008); A1;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

289-80-5, Pyridazine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a solution of the corresponding [1,2,3]triazolo[1,5-a]pyridine 1 in anhydrous toluene at -40 C under an argon current, a solution of 1.6 n-BuLi in hexane (1.1 equiv) was added with stirring; a deep red color developed. The mixture was kept at -40 C for 4 h. The azine (1.1equiv) in dry toluene solution was added and the mixture was kept inthe cold bath at -40 C for 2 h. The solution was treated with a saturateds olution of NH4Cl followed by aq KMnO4 solution for 30 min at r.t. The mixture was filtered over Celite, the organic and aqueous layers were separated, the aqueous layer was extracted with CH2Cl2, the combined organic extracts were dried (Na2SO4), and the solution was filtered and concentrated to give the crude product.

289-80-5, The synthetic route of 289-80-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Adam, Rosa; Abarca, Belen; Ballesteros, Rafael; Synthesis; vol. 49; 22; (2017); p. 5059 – 5066;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

135034-10-5, 3-Chloro-6-iodopyridazine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

XlV.i .a [3-(6-Chloro-pyridazin-3-yl)-prop-2-vnyl1-carbamic acid tert-butyl ester; 19.2 g (80.0 mmol) 3-Chloro-6-iodo-pyridazine (Tetrahedron 55, 1999, 15067) and 13.7 g (88.0 mmol) prop-2-ynyl-carbamic acid tert-butyl ester are dissolved in 200 ml THF and 2.50 g (4.0 mmol) bis-(triphenylphosphine)palladiumdichloride, 2.80 g (14.8 mmol) copper-(l)- iodide and finally 60 ml diisopropylamine are added at 0C. The mixture is stirred for 2 hours at 0C. After that time ice-water is added and the mixture is extracted with ethylacetate. The organic phase is separated and dried over sodium sulphate. The solvent is evaporated and the residue is purified by silica gel column chromatography with methylene chloride/ethyl acetate (5:1 ) as eluent. The product is dried in vacuo at 50C. Yield: 12.8 g (60% of theory), Rf value: 0.50 (silica gel, methylene chloride/ethyl acetate = 5:1 ) Ci2H12CIN3O2EII Mass spectrum: m/z = 268/270 [M+H]+ M. p. 102-105 C

135034-10-5, 135034-10-5 3-Chloro-6-iodopyridazine 15418839, apyridazine compound, is more and more widely used in various fields.

Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; BOEHRINGER INGELHEIM PHARMA GMBH & CO. KG; WO2007/48802; (2007); A1;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

7252-84-8, 3-Amino-6-methoxypyridazine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,7252-84-8

Intermediate 51: 4-{F(3,5-d imethyl-4-isoxazolyi)methyl]oxy}-N-F6-(methyloxy-3-Ivridazinvl]benzenesulfona mideTo a solution of 6-methoxypyridazin-3-amine (125 mg, 1.0 mmol) in pyridine (8 mL) at roomtemperature, was added 4-{[(3,5-d imethyl-4-isoxazolyl)methyl]oxy}benzenesulfonyl chloride (0.302g, 1.0 mmol). The reaction mixture was stirred at 20 C for 18 hours. The solvent was evaporated invacuo and passed through an aminopropyl (NH2) solid phase extraction (SPE) cartridge eluting withmethanol, followed by a sulphonic acid (SCX) SPE cartridge eluting with methanol. The crude wasthen purified by flash silica (Si) chromatography (0-100% ethyl acetate-cyclohexane+0-25%methanol gradient), to provide the title compound (16 mg). LCMS (2 mm, formic) Rt 0.83 mi m/z(ESj 391 (M+H).

The synthetic route of 7252-84-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GLAXO GROUP LIMITED; BIRAULT, Veronique; CAMPBELL, Amanda, Jennifer; HARRISON, Stephen; LE, Joelle; SHUKLA, Lena; WO2013/160419; (2013); A1;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

187973-60-0, 6-Iodopyridazin-3-amine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A mixture of tert-butyl l-(but-3-ynyl)-lH-l,2,3-triazole-4-carboxylate (15 g, 68 mmol), 6-iodopyridazin-3 -amine (15 g, 68 mmol), Pd(PPh3)2Ci2 (4.77 g, 6.80 mmol), Cul (1.29 g, 6.8 mmol) and TEA (34.2 g, 339 mmol) in 300 mL anhydrous THF was heated at 60 C under 2 for 12 h. The mixture was cooled to rt, DCM/MeOH (500 mL, 10 : 1) was added, filtered off and concentrated under reduced pressure to give a yellow oil. The oil was purified by silica gel column (0 to 9% DCM in MeOH) to give the title compound as a yellow solid (18.0 g, 84%). MS (ES+) CisHisNeCh requires: 314, found: 315 [M+H]+., 187973-60-0

As the paragraph descriping shows that 187973-60-0 is playing an increasingly important role.

Reference£º
Patent; BOARD OF REGENTS, UNIVERSITY OF TEXAS SYSTEM; DI FRANCESCO, Maria, Emilia; JONES, Philip; HEFFERNAN, Timothy; SOTH, Michael, P.; LE, Kang; CARROLL, Christopher, Lawrence; MCAFOOS, Timothy; BURKE, Jason, P.; THEROFF, Jay; ZANG, Zhijun; (155 pag.)WO2016/4413; (2016); A2;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1120-95-2,3-Chloropyridazine,as a common compound, the synthetic route is as follows.

General procedure: A flask was charged with 2-formylpyrrole 1 (5.00 g, 52.6 mmol), K2CO3 (8.72 g, 63.1 mmol), 2-fluoropyridine 2 (9.0 mL, 105.2 mmol) and DMF (26 mL).The mixture was heated at 100 C for 20 h and then cooled to rt. The reaction mixturewas diluted with water, extracted with MTBE, and the organic phase was dried (MgSO4), filtered, and concentrated. The crude product was purified by chromatography on SiO2(hexanes/EtOAc, 95:5 to 85:15 v/v) to give the product 3 (5.71 g, 63%) as a tan solid., 1120-95-2

As the paragraph descriping shows that 1120-95-2 is playing an increasingly important role.

Reference£º
Article; Reeves, Jonathan T.; Han, Zhengxu S.; Goyal, Navneet; Lee, Heewon; Busacca, Carl A.; Senanayake, Chris H.; Tetrahedron Letters; vol. 55; 15; (2014); p. 2492 – 2494;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.6082-66-2,3,4,6-Trichloropyridazine,as a common compound, the synthetic route is as follows.

General procedure: To a stirred solution of substituted phenol (5 mmol) in dimethyl formamide (20 mL) was added 60% sodium hydride (5 mmol) under ice-water bath. After further stirring for 30 min, 3,4,6-trichloropyridazine (6, 5 mmol) was added and reacted at room temperature for 1-24 h. The reaction solution was poured into cold water, then the formed solid was filtered, washed with water and dried to give intermediate 7, which didn?t need any further purification. Intermediate 7 (5 mmol) with substituted aniline (5 mmol) and a few drops of 12 M hydrochloric acid was added and boiled with 50 ml ethanol for 12-48 h under reflux. The reaction solution was poured into cold water, then alkalized to pH 8 with 4 M NaOH solution. Then the solid was filtered, washed with water, dried and recrystallized from DMF/H2O to obtain pyridazine derivatives 8a-l. (0017) Pyridazine derivatives (2 mmol) was boiled with 10 mL acetic acid under reflux overnight. The reaction solution was poured into cold water, then alkalized to pH 8 with 4 M NaOH solution. Then the solid was filtered, washed with water, dried and recrystallized from DMF/H2O to obtain pyridazinone derivatives 9a-l. To a mixture of 9e (2 mmol) in DMF (10 mL) was added absolute potassium carbonate (4 mmol) followed by iodomethane (2 mmol). The solution was refluxed overnight, then poured into cold water, filtered, washed with water, dried and recrystallized from DMF/H2O to obtain 9m. To a mixture of 9e (2 mmol) in DMF (10 mL) was added absolute potassium carbonate (8 mmol) followed by iodomethane (4 mmol). The solution was refluxed overnight, then poured into cold water, filtered, washed with water, dried and recrystallized from DMF/H2O to obtain 9n.

6082-66-2, 6082-66-2 3,4,6-Trichloropyridazine 95123, apyridazine compound, is more and more widely used in various fields.

Reference£º
Article; Li, Dongyue; Zhan, Peng; Liu, Huiqing; Pannecouque, Christophe; Balzarini, Jan; De Clercq, Erik; Liu, Xinyong; Bioorganic and Medicinal Chemistry; vol. 21; 7; (2013); p. 2128 – 2134;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

1632-76-4, 3-Methylpyridazine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(i) 1-(2,4-Difluorophenyl)-2-(pyridazin-3-yl)ethanone Treatment of 3-methylpyridazine (4.70 g) with lithium diisopropylamide (0.05 mole) in dry tetrahydrofuran followed by methyl 2,4-difluorobenzoate (8.60 g) according to the method of Example 11(i) gave the title compound, (3.40 g), m.p. 115.5¡ã-117.5¡ã (from ether).

1632-76-4, As the paragraph descriping shows that 1632-76-4 is playing an increasingly important role.

Reference£º
Patent; Pfizer Inc.; US5116844; (1992); A;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

20744-39-2, Pyridazin-4-amine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a mixture of 27 (500 mg, 1.39 mmol), 4-aminopyridazine (159 mg, 1.67 mmol) and K3PO4 (355 mg, 1.67 mmol) in DMSO (8 mL) were added CuI (318 mg, 1.67 mmol) and N,N’-dimethylethylenediamine (0.18 mL, 1.67 mmol), and the mixture was stirred at 110 C for 30 min under an argon gas atmosphere. After cooling atroom temperature, the mixture was diluted with water and 28% aqueous ammonia solution, and extracted with EtOAc. The organic layer was washed with brine, dried over MgSO4, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography (0-5% MeOH in CHCl3) to give 30f (138 mg, 27%) as a yellow solid. 1H NMR (CDCl3) delta 5.47 (s,2H), 6.80 (dd, 1H, J = 9.4, 2.6 Hz), 6.90 (dd, 1H, J = 5.9, 2.9 Hz), 7.07 (d, 1H, J = 2.6 Hz), 7.57-7.64 (m, 2H), 7.78-7.84 (m, 1H), 7.87 (d, 1H, J = 8.1 Hz), 8.05 (d, 1H, J = 8.6 Hz), 8.22-8.27 (m, 2H), 8.59 (br s, 1H), 9.08 (br s, 1H), 9.58 (s, 1H); MS (ESI) m/z 374 [M+H]+., 20744-39-2

As the paragraph descriping shows that 20744-39-2 is playing an increasingly important role.

Reference£º
Article; Hamaguchi, Wataru; Masuda, Naoyuki; Isomura, Mai; Miyamoto, Satoshi; Kikuchi, Shigetoshi; Amano, Yasushi; Honbou, Kazuya; Mihara, Takuma; Watanabe, Toshihiro; Bioorganic and Medicinal Chemistry; vol. 21; 24; (2013); p. 7612 – 7623;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem

5469-70-5, 3-Aminopyridazine is a pyridazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,5469-70-5

General procedure: To a slurry of 6?-bromo-8?-methyl-2?H-spiro[cyclohexane-1,3?-imidazo[1,5-a]pyridine]-1?,5?-dione (12) and aromatic aminederivatives (1.2 eq) in 1,4-dioxane was added Cs2CO3 (3 eq). Themixture was stirred at room temperature for 20 min under nitrogen.To the mixture was then added Pd(OAc)2 (0.1 eq) and Xantphos(0.2 eq). After stirred at room temperature for additional 20 minunder nitrogen, the mixture was heated at 95 C for 12 h undernitrogen. The mixture was concentrated in vacuo, added with water,stirred and filtered. The filter cake was dried and purified by flashcolumn chromatography.

5469-70-5 3-Aminopyridazine 230373, apyridazine compound, is more and more widely used in various fields.

Reference£º
Article; Yuan, Xinrui; Wu, Hanshu; Bu, Hong; Zheng, Peiyuan; Zhou, Jinpei; Zhang, Huibin; Bioorganic and Medicinal Chemistry; vol. 27; 7; (2019); p. 1211 – 1225;,
Pyridazine – Wikipedia
Pyridazine | C4H4N2 – PubChem