Month: September 2020

7-Bromophthalazin-1(2H)-one, cas is 152265-57-1, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,152265-57-1

10198] 7-l3romo- 1 -chlorophthalazine (9a) In a flame dried25 mE round bottom flask was added 7-bromophthalazin-1 (2H)-one (205 mg, 0.91 mmol), anhydrous acetonitrile (9 mE), and phosphorus oxychloride (0.3 mE, 3.22 mmol). The mixture was refluxed for 2 hours, then cooled to 00 C., diluted with dichloromethane (20 mE), and quenched with a drop- wise addition of sat. aq. NaHCO3 (20 mE). The biphasic mixture was stirred vigorously and allowed to warm to room temperature. Afier 1 hour the layers were separated and the aqueous was extractedwith dichioromethane (2×30 mE). The combined organic layers were washed with sat. aq. NaHCO3 (25 mE), washed with brine (20 mE), dried over Na2SO4, and concentrated to yield 9a as an orange solid in 91% yield. ?HNMR (500 MHz, CDC13) oe 9.45 (s, 1H), 8.49-8.5 1 (m, 1H), 8.10 (dd, J=8.8, 2.0 Hz, 1H), 7.91 (d, J=8.8 Hz, 1H). ECMS found 242.9 [M+H].

With the rapid development of chemical substances, we look forward to future research findings about 7-Bromophthalazin-1(2H)-one

Reference£º
Patent; Northeastern University; POLLASTRI, Michael P.; MEHTA, Naimee; DEVINE, William; WOODRING, Jennifer; SWAMINATHAN, Uma; US2015/259331; (2015); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

4-(4-Fluoro-3-(piperazine-1-carbonyl)benzyl)phthalazin-1(2H)-one, cas is 763111-47-3, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,763111-47-3

4-(4-Fluoro-3-(piperazin-1-yl-carbonyl)-benzyl)pyridazine-1(2H)one (5) (0.78 g, 2.13 mmol) was added to a 25 ml three-necked flask.Dichloromethane (6.5 ml) and triethylamine (0.52 g, 5.14 mmol) were added, and the mixture was stirred and cooled to 1-10 C.Further, 3-methyl crotonyl chloride (304 mg, 2.56 mmol) was added dropwise, and the mixture was warmed to room temperature and stirred for 1 hour.TLC showed the reaction was complete; the reaction mixture was directly concentrated to dryness, and the residue was mixed with water and then stirred for 1 hour and then filtered.Obtained as an off-white solid.The yield was 63%.

As the rapid development of chemical substances, we look forward to future research findings about 763111-47-3

Reference£º
Patent; Shanghai Bobang Pharmaceutical Technology Co., Ltd.; Gao Heyong; Liu Zhende; Zhang Wensheng; (28 pag.)CN108383798; (2018); A;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

6-Bromophthalazin-1(2H)-one, cas is 75884-70-7, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,75884-70-7

In a 10ml seal tube, 6-bromo-2H-pyridazin-l-one (108 mg, 480 muetaiotaomicron, Eq: 1.00), NH4OH (931 mg, 1.03 ml, 7.97 mmol, Eq: 16.6) and copper powder (30.5 mg, 480 muiotaetaomicron, Eq: 1.00) were combined with isopropyl alcohol (1 ml) to give a light brown suspension. The tube was sealed and the reaction was heated to 100 C overnight. The crude reaction mixture was concentrated in vacuo. The reaction mixture was diluted with sat NH4C1 and dichloromethane. The 2 phase mixture was filtered, the filtrate was separated and the aqueous extracted with dichloromethane (3X30 ml). SiC”2 was added to the aqueous phase and concentrated. The solid was suspended in hot dichloromethane/methanol 9: 1 and sonicated. Filtered and washed the filter cake with warm dichloromethane/methanol 9: 1. The filtrate was combined with the dichloromethane extracts and stripped to a light yellow powder. The powder was dried under vacuum at 25C for 1 hour to afford 62 mg (80%) of the desired product. MS +m/z: 162.1. (M+l)

As the rapid development of chemical substances, we look forward to future research findings about 75884-70-7

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; CHEN, Zhi; CHIN, Elbert; ERICKSON, Shawn David; GABRIEL, Stephen Deems; MERTZ, Eric; WEIKERT, Robert James; WO2014/135483; (2014); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

4-(4-Fluoro-3-(piperazine-1-carbonyl)benzyl)phthalazin-1(2H)-one, cas is 763111-47-3, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,763111-47-3

General procedure: Intermediates 8 (1 eq) and respective 9-chloroacridine derivatives 4a-4f (1.1 eq) were added to a round flask, and then excessphenol was added as solvent. The reaction system was warmed up to 60 C until phenol was melted and stirred for 0.5 h under argonprotection. Then the mixture was warmed up to 120 C and continued to reaction for more 2 h. After the reaction was completed, themixture was added to ethyl ether drop by drop [2]. The precipitate was filtered and washed twice with new ethyl ether to give pureproducts 9a-9f, which were then characterized by 1H NMR, 13C NMR, melting point and high resolution mass spectrum (HRMS, ESI).

As the rapid development of chemical substances, we look forward to future research findings about 763111-47-3

Reference£º
Article; Dai, Qiuzi; Chen, Jiwei; Gao, Chunmei; Sun, Qinsheng; Yuan, Zigao; Jiang, Yuyang; Chinese Chemical Letters; vol. 31; 2; (2020); p. 404 – 408;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

4-(4-Fluoro-3-(piperazine-1-carbonyl)benzyl)phthalazin-1(2H)-one, cas is 763111-47-3, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,763111-47-3

A reaction mixture of amine precursor (51 mg, 0.139 mmol), 4-carboxylphenylboronic acid pinacol ester (38 mg, 0.153 mmol), HATU (60 mg, 0.158 mmol) and DIPEA (50 muL) in DMF (1 mL) was stirred at room temperature overnight. Water (10 mL) was added, and precipitate was filtered and rinsed with water, and then dissolved in ethyl acetate. After drying by magnesium sulfate, the solution was concentrated under reduced pressure. The residue was purified by silica gel chromatography to afford final product (37 mg) as white solid. M.P.: 288-291 C; 1H NMR (400MHz, CDCl3) delta 10.66 (s, 1H), 8.47 (s, 1H), 7.85-7.72 (m, 5H), 7.38-7.33 (m, 4H), 7.04 (m, 1H), 4.29 (s, 2H), 3.73 (m, 4H), 3.37 (m, 4H), 1.35 (s, 9H), 1.27 (s, 3H). 13C NMR (100MHz, CDCl3) delta 160.4, 145.5, 142.2, 135.0, 134.4, 133.7, 131.6, 129.5, 129.2, 128.3, 127.2, 126.1, 125.0, 121.5, 84.1, 37.7, 29.7, 24.8; HRMS m/z: calcd for C33H34BFN4O5+H, 597.2679; found 579.2661.

As the rapid development of chemical substances, we look forward to future research findings about 763111-47-3

Reference£º
Article; Zhou, Dong; Chu, Wenhua; Voller, Thomas; Katzenellenbogen, John A.; Tetrahedron Letters; vol. 59; 20; (2018); p. 1963 – 1967;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

6-(tert-Butyl)-8-fluorophthalazin-1(2H)-one, cas is 1242156-59-7, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,1242156-59-7

2-(4-Bromo-2-fluoro-benzyl)-6-tert-butyl-8-fluoro-2H-phthalazin-1-one To a 20 mL reaction vial with stirbar was added 6-(tert-butyl)-8-fluorophthalazin-1(2h)-one (200.00 mg; 0.91 mmol; 1.00 eq.), 4-bromo-2-fluorobenzyl bromide (267.63 mg; 1.00 mmol; 1.10 eq.), and cesium carbonate (591.75 mg; 1.82 mmol; 2.00 eq.) in ACN (6.00 ml; 114.88 mmol; 126.50 eq.). The reaction vial was sealed and heated to 80 C. overnight. Concentrated and purified by flash chromatography (KP-sil column, 10 g; 5-50% EtOAc/hexanes 15 CV). Concentrated product fractions and dried to afford 218 mg (59%) of the title compound as a orange solid. HPLC: 97% purity. MS: 408 [M+H]+

As the rapid development of chemical substances, we look forward to future research findings about 1242156-59-7

Reference£º
Patent; Merck Patent GmbH; GAILLARD, Pascale; SEENISAMY, Jeyaprakashnarayanan; LIU-BUJALSKI, Lesley; CALDWELL, Richard D.; POTNICK, Justin; QIU, Hui; NEAGU, Constantin; JONES, Reinaldo; WON, Annie Cho; GOUTOPOULOS, Andreas; SHERER, Brian A.; JOHNSON, Theresa L.; GARDBERG, Anna; (234 pag.)US2016/96834; (2016); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

75884-70-7,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.75884-70-7,6-Bromophthalazin-1(2H)-one,as a common compound, the synthetic route is as follows.

To a stirred solution of commercially available 2a (100mg, 0.444 mmol) in DMF was added NaH (32 mg, 1.333 mmol) at 0 oC. After stirring for 20 min, 3-methoxybenzyl bromide (62 muL, 0.444 mmol) was added into the cooled solution. Then the reaction was transferred to RT and kept stirring for 12h. The reaction mixture was concentrated to dryness under vacuum and then partitioned between CH2Cl2 and water. The organic layer was washed with brine and dried over MgSO4. The organic phase was concentrated to dryness under vacuum and puried via a ash chromatography silica gel plate (20 ¡Á 20 cm) to afford intermediate 3a (petroleum ether/ethyl acetate, 2/1) in 45% yield as a pale yellow solid. 1H NMR (400 MHz, DMSO) delta 8.42 (s, 1H), 8.26 (d, J = 1.8 Hz, 1H), 8.18 (d, J = 8.5 Hz, 1H), 8.03 (dd, J = 8.5, 1.9 Hz, 1H), 7.24 (t, J = 7.8 Hz, 1H), 6.87 (s, 2H), 6.85 (dd, J = 7.7, 2.9 Hz, 1H), 5.28 (s, 2H), 3.72 (s, 3H).

The synthetic route of 75884-70-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Miao, Zhuang; Sun, Yu-meng; Zhao, Lan-ying; Li, Yue-shan; Wang, Yi-fei; Nan, Jin-shan; Qiao, Ze-en; Li, Lin-li; Yang, Sheng-yong; Bioorganic and Medicinal Chemistry Letters; vol. 30; 6; (2020);,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

4-(4-Fluoro-3-(piperazine-1-carbonyl)benzyl)phthalazin-1(2H)-one, cas is 763111-47-3, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,763111-47-3

General procedure: Intermediates 8 (1 eq) and respective 9-chloroacridine derivatives 4a-4f (1.1 eq) were added to a round flask, and then excessphenol was added as solvent. The reaction system was warmed up to 60 C until phenol was melted and stirred for 0.5 h under argonprotection. Then the mixture was warmed up to 120 C and continued to reaction for more 2 h. After the reaction was completed, themixture was added to ethyl ether drop by drop [2]. The precipitate was filtered and washed twice with new ethyl ether to give pureproducts 9a-9f, which were then characterized by 1H NMR, 13C NMR, melting point and high resolution mass spectrum (HRMS, ESI).

As the rapid development of chemical substances, we look forward to future research findings about 763111-47-3

Reference£º
Article; Dai, Qiuzi; Chen, Jiwei; Gao, Chunmei; Sun, Qinsheng; Yuan, Zigao; Jiang, Yuyang; Chinese Chemical Letters; vol. 31; 2; (2020); p. 404 – 408;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

72702-95-5,72702-95-5, 2-(3-(4-Bromo-2-fluorobenzyl)-4-oxo-3,4-dihydrophthalazin-1-yl)acetic acid is a phthalazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 54 Acetyl chloride (10 ml.) was added to stirred methanol (150 ml.) to give a solution of hydrogen chloride in methanol and methyl acetate. 2-(2-Fluoro-4-bromobenzyl)-1,2-dihydro-1-oxophthalazin-4-ylacetic acid (2.1 g.) was added to this solution and the mixture was heated under reflux for 18 hours, and then cooled to room temperature. The solid which crystallized out was separated by filtration and recrystallized from methanol to give methyl 2-(2-fluoro-4-bromobenzyl)-1,2-dihydro-1-oxophthalazin-4-ylacetate (1.4 g.), m.p. 151-153 C.

As the paragraph descriping shows that 72702-95-5 is playing an increasingly important role.

Reference£º
Patent; Imperial Chemical Industries Limited; US4251528; (1981); A;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem

763114-26-7, 2-Fluoro-5-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoic acid is a phthalazine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,763114-26-7

A solution of 1-5 – [(3,4-dihydro-4-oxo-l-phthalazinyl) methyl] -2- fluorobenzoic acid (60.0 g, 0.20 mol)Suspended in 600 mL of acetonitrile,Anhydrous piperazine (43.0 g, 0.50 mol)Piperazine dihydrochloride (79.0 g, 0.50 mol)Concentrated sulfuric acid (2.78 ml, 0.04 mol)Heated to 78-80 C under reflux for 7 to 8 hours,Drop to room temperature,Concentrated under reduced pressure acetonitrile, water was added 1000ml, stirred for 30min; concentrated ammonia was added dropwise to a PH value of 7-8, stirred 2h, suction filtration,44.1 g of 1- [5 – [(3,4-dihydro-4-oxo-1-phthalazinyl) methyl] -2-fluorobenzoyl] piperazine was obtained in a yield of 60.1%.1- [5 – [(3,4-dihydro-4-oxo-1-phthalazin-yl) methyl] -2-fluorobenzoyl] piperazine 1H NMR, (400 MHz) see Figure 1.

As the paragraph descriping shows that 763114-26-7 is playing an increasingly important role.

Reference£º
Patent; Shanghai Pharmaceutical Group Co., Ltd.; Deng Yu; (7 pag.)CN106554316; (2017); A;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem