Category: piperazines

373608-48-1, tert-Butyl 4-(3-aminopropyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Tert-butyl 4-(3-((2,4-dinitrophenyl)amino)propyl)piperazine-l-carboxylateTo a stirred solution of tert-butyl 4-(3-aminopropyl)piperazine-l-carboxylate (2 g, 8.22 mmol), in dichloromethane (DCM) (30 mL) was added l-fluoro-2,4-dinitrobenzene (1.529 g, 8.22mmol) and Et3N (2.291 mL, 16.44 mmol). The reaction mixture was stirred at 25 C for 12 hr. Progress of the reaction was monitored by TLC (TLC system 50% EtOAc in Hexane, Rf :0.5).The reaction mixture was concentrated under reduced pressure to get crude compound as a pale yellow solid. The crude compound was triturated with diethyl ether and dried to afford tert-butyl 4-(3-((2,4-d trophenyl)amino)propyl)piperazine-l-carboxylate (2.7 g, 6.48 mmol, 79 % yield) as a pale yellow solid. LCMS: m/z (M+H = 410).

373608-48-1, 373608-48-1 tert-Butyl 4-(3-aminopropyl)piperazine-1-carboxylate 17750945, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; BAILEY, James; CHEN, Yao; HURLE, Mark; LEACH, Craig; TURUNEN, Brandon; (103 pag.)WO2018/134731; (2018); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.129799-08-2,1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate,as a common compound, the synthetic route is as follows.

Step 5: The preparation of 4-(3-Methyl-butyl)-piperazine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester: Piperazine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester (6.0 g, 24.6 mmol) was treated with EtOH (100 mL), isovaleraldehyde (5.3 mL, 50 mmol), and 20% Pd/C (1.0 g), then shaken under an atmosphere of H2. The reaction was filtered and concentrated. The residue was chromatographed on silica gel eluding with 2:1 hexanes/EtOAC to give 7.0 g (90%) of the desired product as an oil. MS: 316 (M+1 for C16H30N2O4); colorless liquid; TLC: SiO2, Rf0.8 (50% hexanes/EtOAc);, 129799-08-2

As the paragraph descriping shows that 129799-08-2 is playing an increasingly important role.

Reference£º
Patent; Warner-Lambert; US6251919; (2001); B1;,
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.161357-89-7,1-(Methylsulfonyl)piperazine hydrochloride,as a common compound, the synthetic route is as follows.

A suspension of (3R,4S)-1-benzyl-4-(4-bromophenyl)-N,N-dimethylpyrrolidin-3-amine (3.24 g, 9.02 mmol), 1-(methylsulfonyl)piperazine hydrochloride (2.172 g, 10.82 mmol), tris(dibenzylideneacetone)dipalladium (0) (0.826 g, 0.902 mmol), 2-(dicyclohexylphosphine)-2′,4′,6′-tri-isopropylbiphenyl (0.860 g, 1.803 mmol) and sodium tert-butoxide (2.167 g, 22.54 mmol) in dioxane (32.2 ml) in a 250 ml round bottom flask was taken through three vacuum/nitrogen-purge cycles and heated in a heating block under a condenser at 110C for 2 hours. The mixture was diluted with ethyl acetate and filtered through diatomaceous earth with ethyl acetate washes. The filtrate was washed with saturated sodium bicarbonate (20 ml), dried with magnesium sulfate, filtered, and concentrated. The residue was flash chromatographed (50 mm silica gel column; 6.5% methanol/dichloromethane w/0.1% ammonium hydroxide) to afford the title compound., 161357-89-7

The synthetic route of 161357-89-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Curtin, Michael L.; Pliushchev, Marina A.; Li, Huan-Qiu; Torrent, Maricel; Dietrich, Justin D.; Jakob, Clarissa G.; Zhu, Haizhong; Zhao, Hongyu; Wang, Ying; Ji, Zhiqin; Clark, Richard F.; Sarris, Kathy A.; Selvaraju, Sujatha; Shaw, Bailin; Algire, Mikkel A.; He, Yupeng; Richardson, Paul L.; Sweis, Ramzi F.; Sun, Chaohong; Chiang, Gary G.; Michaelides, Michael R.; Bioorganic and Medicinal Chemistry Letters; vol. 27; 7; (2017); p. 1576 – 1583;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

780753-89-1, 1-(4-Fluorophenyl)piperazin-2-one is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 12^{^-Chloro-S-ttrifluoromethylJphenylJcarbony^-i^-fluorophenyl)^- piperazinone (E12); A solution of 1-(4-fluorophenyl)-2-piperazinone (100 mg, 0.52 mmol, prepared as described below), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (158 mg, 0.82 mmol), and lambda/,lambda/-dimethyl-4-pyridinamine (252 mg, 2.06 mmol) in dichloromethane (4 ml) was stirred at room temperature under argon. 2-Chloro-3- (trifluoromethyl)benzoic acid (116 mg, 0.52 mmol) was added portionwise and the mixture was left overnight. Dichloromethane and aqueous 3N citric acid were then added and the mixture was extracted into dichloromethane (x2). The dichloromethane layers were combined and washed sequentially with water (x1 ), saturated aqueous sodium hydrogen carbonate (x1 ), water (x1 ), and brine (x1 ), and then dried over magnesium sulphate. The solvent was evaporated in vacuo and the crude product was purified by flash-silica gel chromatography, eluting with 30-70percent ethyl acetate in isohexane, to give 4-{[2-chloro-3-(trifluoromethyl)phenyl]carbonyl}-1- (4-fluorophenyl)-2-piperazinone (101 mg) as a white solid. LC/MS [M+H]+ = 401 , retention time = 2.70 minutes.

780753-89-1, The synthetic route of 780753-89-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GLAXO GROUP LIMITED; WO2009/53459; (2009); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

70261-81-3, 1-Methyl-4-(4-nitrobenzyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 3 4-((4-methyl-1-piperazinyl)methyl)aniline (I-c) Crude I-a (8.5g, 36.2mmol), FeO(OH)/C, 2.0 g as catalyst and 95% ethanol (100 ml) were added into a 500 mL single neck flask, which was refluxed. Into the reaction system were added slowly and dropwise a mixture of 25 mL hydrazine hydrate and 20 mL 95% ethanol. The depletion of the starting materials was confirmed by TLC (methanol: chloroform = 1:15). Suction filtration was performed while the reaction mixture was hot. The filter cake was washed with hot ethanol twice (30 ml *2). After removal of the solvent under reduced pressure, white solid was obtained, which was dried under vacuum to give 6.7 g (I-c); Yield: 90.3%. The product was used for subsequent reaction without further purification. 1H-NMR[300MHz, DMSO-d6]: delta2.1 (3H, s, -CH3), 2.3-2.5 (8H, m, -CH2-*4), 3.5 (2H, s, -CH2-), 4.0(2H, s, -NH2), 7.5 (2H, d, J = 8.7 Hz, ArH), 8.1 (2H, d, J = 8.7 Hz, ArH)., 70261-81-3

70261-81-3 1-Methyl-4-(4-nitrobenzyl)piperazine 677795, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; China Pharmaceutical University; LU, Tao; WANG, Yue; CHEN, Yadong; LU, Yi; WANG, Zhanwei; JIN, Qiaomei; YANG, Taotao; LIN, Guowu; GUO, Qinglong; ZHAO, Li; EP2955185; (2015); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

143673-66-9, (R)-3-Isopropylpiperazine-2,5-dione is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

143673-66-9, Example 153. (2R)-2-(l-Methylethyl)piperazine (153); CH3H3CHNQNH[0540] A solution of (i?)-(-)-3-isopropyl-2,5-piperazinedione (1.0 g, 6.40 mmol) in THF(30 mL) was treated with LAH (25.6 mL, 25.6 mmol, 1.0 M in THF) and warmed to reflux for 16 h. The reaction mixture was then cooled to 0 C and quenched via the addition of water (2 mL), 4 M NaOH (2 mL), and more water (6 mL). On stirring the resultant suspension at it for 1 h, the mixture was dried (Na2SO4), filtered and the filter cake washed with THF (150 mL). The combined filtrates were evaporated to afford the title product as a pale orange semi-solid: 1H NMR deltaH (250 MHz, CDCl3) 2.90 (2H, dd), 2.70 (2H, m), 2.35 (2H, dd), 2.30 (IH, m), 2.22 (2H, br s), 1.48 (IH, m), 0.89 (3H, d), 0.86 (3H, d).

The synthetic route of 143673-66-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PANACOS PHARMACEUTICALS, INC.; NITZ, Theodore, J.; SALZWEDEL, Karl; FINNEGAN, Catherine; WILD, Carl; BRUNTON, Shirley; FLANAGAN, Stuart; MONTALBETTI, Christian; COULTER, Thomas, Stephen; KIMBER, Marc; MAGARACI, Filippo; JOHNSTON, David; WO2008/134035; (2008); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

169447-70-5, (S)-tert-Butyl 2-methylpiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A solution of 5-bromo-l,2,3-trifluorobenzene (1.05 g, 5.0 mmol), (S) -ter t-butyl 2- methylpiperazine-l-carboxylate (1.0 g, 5.0 mmol), t-BuONa (720 mg, 7.5 mmol), BetaGammaNuAlphaRho (62 mg, 0.1 mmol), and Pd2(dba)3 (92 mg, 0.1 mmol) in dry toluene (20 mL) was stirred for 17 hrs at 80C. The crude product was purified by chromatography (silica, EtOAc/PE = 1/30) to afford (S)-tert- butyl-2-methyl-4-(3,4,5-trifluorophenyl)piperazine-l-carboxylate (0.9 g, 2.7 mmol, 54%) as a yellow oil. ESI-MS (EI+, m/z): 275.0 [M-56]+.

169447-70-5, As the paragraph descriping shows that 169447-70-5 is playing an increasingly important role.

Reference£º
Patent; NAVITOR PHARMACEUTICALS, INC.; O’NEILL, David John; SAIAH, Eddine; KANG, Seong Woo Anthony; BREARLEY, Andrew; BENTLEY, Jonathan; (184 pag.)WO2018/89493; (2018); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

59878-57-8, 1-(Cyclopropylcarbonyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

200 mg of intermediate VIII was dissolved5 ml of N, N-dimethylacetamide,To the system was added 454 mul of N, N-diisopropylethylamine,360 mg of benzotriazole-N, N, N ‘, N’-tetramethyluronium hexafluorophosphate,Stir added 107.27 mg of 1-cyclopropylmethyl-formyl piperazine,After 24 hours of reaction at room temperature,The reaction was stopped, water was added to the system and extracted with methylene chloride. The organic layer was subjected to column chromatography to give 85.8 mg (I-1) as a white solid in 30% yield., 59878-57-8

59878-57-8 1-(Cyclopropylcarbonyl)piperazine 2064235, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; East China University of Science and Technology; Shanghai Institute of Materia Medica Chinese Academy of Sciences; Li, Jian; Miao, Zehong; Ding, Jian; Jiang, Hualiang; Liu, Yunxia; Huan, Xiajuan; Song, Shanshan; Chen, Yi; Ren, Guobin; (46 pag.)CN104003940; (2017); B;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

76003-29-7, 1-Boc-3-Oxopiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Preparation of tert-butyl 4-(4-bromobenzyl)-3-oxopiperazine-] -carboxylate (89)Sodium hydride (60% dispersion in mineral oil, 0.72g, l8mmol) was added to a suspension of 4-Boc-piperazinone (88) (3g, lSmmol) in DMF (30m1) under argon. The reaction mixture was stirred at room temperature for 30 minutes, and 4-bromobenzylbromide (87)(4.5g, l8mmol) was added. The reaction mixture was heated at 60 C for one hour, cooled down, diluted with ethyl acetate (lOOml) and washed with water (1 OOml) and brine (lOOml). The ethylacetate solution was dried over sodium sulfate, and concentrated. The crude material was purified with automated column chromatography using petroleum ether and ethyl acetate as eluents to give 1 -((3,5 ?-bis(trifluoromethyl)- [1,1 ?-biphenyll -4-yl)methyl)piperazin-2-one (89)(5.33g) as off white solid. Yield: 96%. Synthesis confimed by LCMS and MS (positive ion mode).

76003-29-7, The synthetic route of 76003-29-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ZALICUS PHARMACEUTICALS LTD.; PAJOUHESH, Hassan, A.; HOLLAND, Richard; ZHANG, Lingyun; PAJOUHESH, Hossein, O.; LAMONTAGNE, Jason; WHELAN, Brendan; SHORT, Glenn, F., III.; ROMERO, Donna, L.; WO2013/131018; (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.304897-49-2,tert-Butyl 4-(4-aminobenzyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

solution of tert-butyl 4-(4-aminobenzyl)piperazine-1-carboxylate (0.900 g, 3.089mmol), pyridine (0.299 mL, 3.706 mmol) and ethanesulfonyl chloride (0.477 g, 3.706 mmol) in dichloromethane (30 mL) was stirred at the room temperature for 12 hr. Then, water was added to the reaction mixture, followed by extraction with dichloromethane. The organic layer was washed with aqueous saturated ammonium chloride solution, dried with anhydrous MgSO4, filtered, and concentrated in vacuo. The residue was chromatographed (Si02, 12 g cartridge; ethyl acetate / hexane = 0 % to 40 %) to give tert-butyl 4-(4-(ethylsulfonamido)benzyl)piperazine-1-carboxylate as yellow solid (0.800 g, 67.5 %).

304897-49-2, 304897-49-2 tert-Butyl 4-(4-aminobenzyl)piperazine-1-carboxylate 12045001, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; CHONG KUN DANG PHARMACEUTICAL CORP.; LEE, Jaekwang; HAN, Younghue; KIM, Yuntae; CHOI, Daekyu; MIN, Jaeki; BAE, Miseon; YANG, Hyunmo; KIM, Dohoon; (644 pag.)WO2017/18803; (2017); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics