Tag: M.W:100-200

75336-86-6, (R)-2-Methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

In a sealed tube, 7-fluoro-2-(2-methylimidazo[1,2-b]pyridazin-6-yl)-4H-pyrido[1,2-a]pyrimidin-4-one (Intermediate 1; 50 mg, 0.169 mmol), and (R)-2-methylpiperazine (68 mg, 0.677 mmol, 4.0 eq.) were stirred in DMSO (2 mL) at 110 C. overnight. The solvent was removed under high vacuum. The residue was taken up in CH2Cl2 and washed with an aqueous saturated solution of NaHCO3. The organic layer was separated and dried over Na2SO4 and concentrated in vacuo. The crude was purified by column chromatography (SiO2, CH2Cl2/MeOH=95/5 to 90/10) to afford the title product (48 mg, 75%) as a light yellow solid. MS m/z 376.3 [M+H+].

75336-86-6, 75336-86-6 (R)-2-Methylpiperazine 7330434, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; Hoffmann-La Roche Inc.; PTC Therapeutics, Inc.; Ratni, Hasane; Green, Luke; Weetall, Maria L.; Naryshkin, Nikolai A.; (33 pag.)US2019/315773; (2019); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.21655-48-1,cis-2,6-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

Part A: 1,1 -Dimethylethyl (3R,5S)-3,5-dimethyl-1-piperazinecarboxylate. To a solution of c/s-2,6-dimethylpiperazine (1.142 g, 10 mmol) in dichloromethane (25 ml.) at 0 0C was added dropwise bis(1 ,1-dimethylethyl) dicarbonate (2.161 g, 9.9 mmol) in dichloromethane (6 ml_). The reaction mixture was allowed to warm to room temperature and stirred overnight before being diluted with dichloromethane and washed with saturated aqueous Na2CO3 solution. The aqueous layer was back extracted with dichloromethane once. The combined organic layers were washed with brine, dried (MgSO4) and evaporated to yield 1 ,1-dimethylethyl (3R,5S)-3,5-dimethyl-1- piperazinecarboxylate (2.04 g, 95%). LCMS: (M+H)+: 215.1.

21655-48-1, 21655-48-1 cis-2,6-Dimethylpiperazine 6950261, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2009/61879; (2009); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

4318-42-7, 1-Isopropylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,4318-42-7

Tris(dibenzylideneacetone)dipalladium(0) (0.014 g, 0.02 mmol) was added to a deoxygenated suspension of 1-isopropylpiperazine (0.151 g, 1.18 mmol), methyl 4-bromobenzoate (0.215 g, 1 mmol), potassium carbonate (0.193 g, 1.4 mmol) and 2-dicyclohexylphosphino-2′-(N,N-dimethylamino)biphenyl (0.012 g, 0.03 mmol) in DME (4 mL), and sealed into a microwave tube. The reaction was heated to 130¡ã C. for 10 mins in the microwave reactor and cooled to room temperature. The reaction mixture was evaporated to dryness, redissolved in EtOAc (25 mL) and washed sequentially with water (15 mL) and saturated brine (15 mL). The organic layer was dried over MgSO4, filtered and evaporated to afford crude product. The crude product was purified by silica column chromatography, eluting with 5percent MeOH in DCM. Pure fractions were evaporated to dryness to afford methyl 4-(4-propan-2-yl-piperizin-1-yl)benzoate (0.170 g, 64.8percent) as a tan solid. 1HNMR (399.9 MHz, CDCl3) delta 1.09 (6H, d), 2.66 (4H, t), 2.73 (1H, q), 3.34 (4H, t), 3.86 (3H, s), 6.84-6.88 (2H, m), 7.89-7.93 (2H, m). MS: m/z 264 (MH+).

As the paragraph descriping shows that 4318-42-7 is playing an increasingly important role.

Reference£º
Patent; ASTRAZENECA AB; US2008/153812; (2008); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

5464-12-0,5464-12-0, 1-(2-Hydroxyethyl)-4-methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

NaH (0.039g, 0.96 mmol, 60percent dispersion in oil) was taken up in a dry capped microwave vial. To this, 1-(2-hydroxyethyl)-4-methylpiperazine (0.023g, 0.16mmol) dissolved in dry tetrahydrofuran ( 1.6mL) was added dropwise. The mixture was stirred at rt for 20 min. Intermediate C ( 0.075g, 0.16mmol) was then added in one portion to this suspension and the mixture was heated to 67¡ã C in the closed seal tube for 25 min. The mixture was allowed to reach at rt and quenched with a few drops of methanol. Solvent was removed under vacuum and the resultant crude was subjected to FCC eluting with DCM- MeOH (95/5) to furnish the desired product D ( 0.081g).

The synthetic route of 5464-12-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ARIAD PHARMACEUTICALS, INC.; ZHU, Xiaotian; WANG, Yihan; SHAKESPEARE, William, C.; HUANG, Wei-Sheng; DALGARNO, David, C.; WO2013/169401; (2013); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.13754-38-6,1-Benzoylpiperazine,as a common compound, the synthetic route is as follows.

Synthesis of (4-(2-amino-9-(3-(4-ethylpiperazin-l-yl)propyl)-9H-purin-6-yl)piperazin-l- yl)(phenyl)methanone (18): Compound 17 was dissolved in acetonitrile (5 mL), potassium carbonate (1.2 g, 0.03 mmol) and phenyl(piperazine-l -yl) methanone (0.84 g, 0.03 mmol) were added. The reaction was stirred for 2 hours under N2 atmosphere condition at 100 C. Acetonitrile was evaporated under the vacuum, then water was added to the reaction mixture to get precipitate which was filter off to get precipitate (0.8 g, yield 70%) of product 18. 1H NMR (300 MHz, CDCI3) delta ppm 7.49 (s, 1H), 7.42 (d, J = 9 Hz, 4H), 4.63 (s, 2H), 4.26 (s, 3H), 4.09 (t, J = 6 Hz, 2H), 3.89 (s, 2H), 3.54 (s, 2H), 2.42 (d, J = 6 Hz, 8H), 2.28-2.40 (m, 3H), 1.85-2.03 (m, 3H), 1.08 (t, J = 6 Hz, 3H). ESI-MS m/z 478.34 (M+H)., 13754-38-6

13754-38-6 1-Benzoylpiperazine 762654, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH; TALUKDAR, Arindam; GANGULY, Dipyaman; MUKHERJEE, Ayan; PAUL, Barnali; RAHAMAN, Oindrila; KUNDU, Biswajit; ROY, Swarnali; DEBLINA, Raychaudhuri; (60 pag.)WO2019/92739; (2019); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

21655-48-1, cis-2,6-Dimethylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: Methyl 4-fluorobenzoate (4.6 g, 29.7 mmol) was dissolved in DMSO (20 mL), followed by the addition of K2CO3 (12.3 g, 89.1 mmol) and 1-ethylpiperazine (7.6 mL, 59.4 mmol). The mixture was heated to 110 ¡ãC and stirred for 10 h before being cooled to room temperature and diluted with water (50 mL) and EtOAc (200 mL). The organic phase was washed with brine (50 mL), dried over Na2SO4, filtered, and concentrated. The residue was purified by silica gel column chromatography using CH2Cl2?MeOH (10:1) to get 4a (6.4 g, 89.2percent) as a yellow solid.

21655-48-1, The synthetic route of 21655-48-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Cui, Jing; Peng, Xia; Gao, Dingding; Dai, Yang; Ai, Jing; Li, Yingxia; Bioorganic and Medicinal Chemistry Letters; vol. 27; 16; (2017); p. 3782 – 3786;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

74879-18-8, (S)-(+)-2-Methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,74879-18-8

(S)+-2-methylpiperazine (10 g) was dissolved in acetonitrile (140 ml) and cooled to 5-10 C. whereupon triethylamine (35 ml) was added, followed by drop wise addition of a solution of trityl chloride (27.9 g) in DCM (80 ml). The reaction was stirred for 1 h at RT. The resulting slurry was cooled to approximately 0 C. then filtered. The filtrate was evaporated in vacuo and the residue was purified by chromatography (silica, 0-1% MeOH/DCM as eluent), then triturated with ether to give the sub-title compound as a white solid yield, 29.8 g.1H NMR CDCl3: delta 7.49-7.37 (6H, m), 7.26 (6H, t), 7.15 (3H, t), 3.38-3.28 (1H, m), 3.22 (1H, dd), 3.11-2.99 (3H, m), 1.74-1.6 (1H, m), 1.44-1.3 (1H, m), 1.11 (3H, d).

The synthetic route of 74879-18-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ASTRAZENECA AB; US2008/255150; (2008); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

59702-07-7, 1-Methylpiperazin-2-one is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

59702-07-7, A mixture of ethyl 3-{[(benzyloxy)carbonyl]amino}-7-bromoquinoline-2-carboxylate (250 mg, 0.58 mmol), 1-methylpiperazin-2-one (130 mg, 1.2 mmol), Pd(OAc)2 (20 mg), dicyclohexyl(2′,6′-diisopropoxybiphenyl-2-yl)phosphine (41 mg, 0.087 mmol), and K3PO4 (490 mg, 2.3 mmol) in tert-butyl alcohol (8 mL) was purged with nitrogen then heated at 100¡ã C. in a sealed vial for 3 h. The mixture was then allowed to cool and EtOAc and water were added. The resulting layers were separated and organic layer was concentrated under reduced pressure. To the resulting bright-yellow solid, 2 mL of dioxane, 2 mL of 2 M NaOH were added. The mixture was heated in 80¡ã C. oil bath with stirring for 0.5 h, then allowed to cooled and neutralized with 4 mL of with 1 M Cl. The red solid formed was collected by filtration and air-dried overnight to give the sub-title compound (24 mg, 9.5percent). LCMS calc. for C26H33N8O2 [M+H]+: m/z=489.3. found: 435.2

The synthetic route of 59702-07-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; INCYTE CORPORATION; Li, Yun-Long; Burns, David M.; Feng, Hao; Xue, Chu-Biao; Wang, Anlai; Pan, Jun; US2014/200216; (2014); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.142-64-3,Piperazine Dihydrochloride,as a common compound, the synthetic route is as follows.

Anhydrous piperazine 1 9.5 g (0.11 mol) and piperazinium dihydrochloride 2 31.8 g (0.2 mol) were dissolved in ethanol (80 mL), and the mixture was heated at 75 C for 3 h. To the solution, benzyl chloride 13.9 g (0.11 mol) was added dropwise. The reaction mixture was refluxed for another 2 h monitoring by TLC. The stirring mixture was cooled and then filtered. The filter cake was washed with ethanol and the filtrate was concentrated in vacuo, which was then washed with a solution of NaOH (6 M, pH > 12). The aqueous layer was extracted with CH2Cl2 at pH > 12. The organic layers were combined, dried over Na2SO4, and concentrated in vacuo. The crude product was purified by flash column chromatography on silica gel (1:3 MeOH/CH2Cl2) to give N-benzylpiperazine 3 18.4 g; yield 95 %. 1HNMR (500 MHz, CDCl3): 7.34-7.28 (m, 5H, Ph), 3.57 (s, 2H, OBn), 3.23 (s, 4H, piperazine-H), 2.77 (s, 4H, piperazine-H). MS (ESI): m/z = 176 (M+ +H). Spectroscopic data are according to the literature [19]., 142-64-3

The synthetic route of 142-64-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Hu, Xiao; Qiu, Qiong; Wang, Wen-Ling; Wang, Jin; Research on Chemical Intermediates; vol. 43; 1; (2017); p. 57 – 61;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

4318-42-7, 1-Isopropylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a stirred mixture of 1-(2-propyl)piperazine (130 mg, 1.0 mmol) and dry DCM (10 ml) was added 2-(4-chlorophenoxy)ethyl 4-nitrophenylcarbonate (330 mg, 1.0 mmol). The mixture was stirred overnight at room temperature and then diluted with DCM (30 ml). The reaction mixture was washed with 0.5 N NaOH (3.x.20 ml) and water (3.x.20 ml). The organic phase was concentrated and the oily residue was dissolved in a 0.5 N HCl solution (15 ml). The acidic solution was washed with diethyl ether (10 ml), concentrated and re-evaporated twice with acetonitrile to give 300 mg (82percent) of the title compound as a solid. M.p. 174-176 1H NMR (400 MHz, DMSO-d6): 51.25 (d, 6H), 2.88-3.02 (m, 2H), 3.3-3.5 (m, 5H), 3.95-4.10 (m, 2H), 4.20 (t, 2H), 4.35 (t, 2H), 7.00 (d, 2H), 7.34 (d, 2H), 11.0 (brs, 1H).

4318-42-7, The synthetic route of 4318-42-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Dorwald, Florencio Zaragoza; Andersen, Knud Erik; Sorensen, Jan Lindy; US2004/19039; (2004); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics