Heterocyclic Building Blocks-piperazine

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

PREPARATION 76 1-(1,1-Dimethylethoxycarbonyl)-cis-3,5-dimethylpiperazine Di-tert-butyldicarbonate (5.42 g) in dry methylene chloride (20 ml) is added to a solution of cis-2,6-dimethylpiperazine in dry methylene chloride (70 ml) over one hour. The mixture is stirred an additional 30 rain, washed with water and saline, dried over sodium sulfate and concentrated to give the title compound, NMR (chloroform-d) 3.95, 2.77, 2.32, 1.46, 1.06 delta., 21655-48-1

As the paragraph descriping shows that 21655-48-1 is playing an increasingly important role.

Reference£º
Patent; The Upjohn Company; US5599930; (1997); A;,
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.76003-29-7,1-Boc-3-Oxopiperazine,as a common compound, the synthetic route is as follows.

Step A1, 1-dimethylethyl 4-(2-fIuoro-4-methylphenyl)-3-oxo-1-piporazinecarboxylate A mixture of 1 ,1-dimethylethyl 3-oxo-1 -piperazinecarboxylate (0.326 g, 0.00163 mol), 1-bromo-2-fluoro-4-methylbenzene (0.308 g, 0.0163 mol), (1 R,2R)-N,N’-dimethyl~ 1 ,2-cyclohexanediamine (0.026 mL, 0.163 mmol), copper(l) iodide (3.10 mg, 0.016 mmol) and potassium carbonate (450 mg, 3.26 mmol) in 1 ,4-dioxane (6 mL) in a septum-sealed vial was heated in an oil bath at 120 C overnight. The reaction mixture was cooled to room temperature and filtered through Celite washing with ethyl acetate. The filtrate was washed with saturated aqueous ammonium chloride, water and brine, dried over sodium sulfate and concentrated. The residue was purified by chromatography on silica gel to give the title compound (0. 253 g, 50%). MS (ESI) m/z: 309 (M+1 )., 76003-29-7

As the paragraph descriping shows that 76003-29-7 is playing an increasingly important role.

Reference£º
Patent; GLAXOSMITHKLINE LLC; BANKA, Anna; CATALANO, John, G.; CHONG, Pek, Yoke; FANG, Jing; GARRIDO, Dulce, Maria; MAYNARD, Andy; MILLER, John; PATTERSON, Dan; PEAT, Andrew, James; POWERS, Jeremiah; PRICE, Daniel, J.; ROBERTS, Chris; TAI, Vincent; YOUNGMAN, Michael; WO2011/50284; (2011); 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.438049-91-3,(3R,5R)-tert-Butyl 3,5-dimethylpiperazine-1-carboxylate,as a common compound, the synthetic route is as follows.,438049-91-3

To a solution of 1 -bromo-4-fluoro-2-methoxybenzene (910 mg, 4.4 mmol) and 1 M KHMDS (18 ml_, 18 mmol) in 1 ,4-dioxane (9 mL) was added tert- butyl (3R,5R)- 3,5- dimethylpiperazine-1 -carboxylate (950 mg, 4.4 mmol). The reaction mixture was stirred at 100 C for 3 h. The solvent was removed and the residue was purified by column chromatography (petroleum ether/EtOAc = 20:1 ) to provide tert- butyl {3R,5R)- 4-(3-fluoro-5- methoxyphenyl)-3,5-dimethylpiperazine-1 – carboxylate. LC-MS (ESI): m/z 339.0 [M+H]+.

The synthetic route of 438049-91-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; KEZAR LIFE SCIENCES; JOHNSON, Henry; (166 pag.)WO2019/178510; (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.4318-42-7,1-Isopropylpiperazine,as a common compound, the synthetic route is as follows.,4318-42-7

General procedure: To asolution of substrate 1 (10 mmol) in MeCN (20 mL), iodine (5.1g, 20 mmol) and NaOAc (3.3g, 40 mmol) were carefully added.The reaction mixture was stirred at 70 ¡ãC and monitored byTLC. After completion of the reaction, the mixture was cooledand concentrated to provide the crude product which was purifiedby recrystallization from EtOH or by column chromatographyusing basic alumina.

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

Reference£º
Article; Liu, Ruihuan; Wang, Yikun; Weng, Yanmei; Yao, Caiping; Zhang, Yan; Zhu, Gangzhi; He, Xiaoai; Xu, Kangping; Tan, Guishan; Synlett; vol. 28; 9; (2017); p. 1083 – 1086;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

108-49-6, 2,6-Dimethylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

2,6-Dimethylpiperazine (200.0 mg, 1.75 mmol) and TEA (0.6 mL, 4.37 mmol) were dissolved in DCM (6.0 mL), and (Boc)2O (458.7 mg, 2.10 mmol) was slowly added thereto at 0¡ã C. The reaction mixture was stirred at room temperature for 12 hours and then distilled under reduced pressure. The residue was purified by column chromatography (DCM:MeOH=95:5) on silica. The fractions containing the product were collected and evaporated to obtain yellow liquid compound of tert-butyl 3,5-dimethylpiperazin-1-carboxylate (210.0 mg, 56percent). [0559] 1H-NMR (300 MHz, CDCl3); delta: 3.95 (m, 2H), 2.79 (m, 2H), 2.33 (m, 2H), 1.46 (s, 9H), 1.07 (d, 6H, J=6.3 Hz)

108-49-6, The synthetic route of 108-49-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; C&C RESEARCH LABORATORIES; Ho, Pil Su; Yoon, Dong Oh; Han, Sun Young; Lee, Won Il; Kim, Jung Sook; Park, Woul Seong; Ahn, Sung Oh; Kim, Hye Jung; US2014/315888; (2014); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

129799-15-1, Methyl 1-Boc-piperazine-2-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution of 7-benzyl-2,4-dichloro-6,8-dihydro-5H-pyrido [3,4-d] pyrimidine (5.00 g, 17.0 mmol) and 1-tert-butyl 2-methylpiperazine-1,2-dicarboxylate (4.24 g, 17.3 mmol) in DMSO (80 mL) was added DIEA (5.49 g, 42.5 mmol, 7.42 mL). After stirring at 55¡ã C. for 12 hours, the mixture was diluted with ethyl acetate (100 mL), washed with brine (3 150 mL), dried over Na 2SO 4, filtered and concentrated under vacuum. The residue was purified by column chromatography (SiO 2, PE/EA=3/1) to give 1-tert-butyl 2-methyl 4-(7-benzyl-2-chloro-6,8-dihydro-5H-pyrido[3,4-d] pyrimidin-4-yl)piperazine-1,2-dicarboxylate (8.00 g, 15.9 mmol, 93.8% yield) as a yellow oil. ES+APCI MS m/z 502.1[M+H] +.

129799-15-1, As the paragraph descriping shows that 129799-15-1 is playing an increasingly important role.

Reference£º
Patent; Mirati Therapeutics, Inc.; Array BioPharma Inc.; Blake, James F.; Burgess, Laurence E.; Chicarelli, Mark Joseph; Christensen, James Gail; Cook, Adam; Fell, Jay Bradford; Fischer, John P.; Marx, Matthew Arnold; Mejia, Macedonio J.; Savechenkov, Pavel; Vigers, Guy P.A.; Smith, Christopher Ronald; Rodriguez, Martha E.; US2019/144444; (2019); A1;,
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

In a 500 mL three-necked flask, 12.70 g (63.0 mmol, 1.0 eq.) of Compound 1 was dissolved in 280 mL of dimethylformamide and cooled to 0 C in an ice bath.1.73 g (73.0 mmol, 1.15 equivalents) of sodium hydride were added and stirred under ice cooling for 1 hour.Then 6.60 mL (69.0 mmol, 1.10 equivalents) of methyl bromoacetate was added via syringe.After further stirring for 20 minutes under ice cooling, the reaction solution was warmed to room temperature.After 18 hours, 10 mL of methanol, 10 mL of deionized water and 180 mL of a saturated sodium chloride solution were added to the reaction solution.The aqueous phase was extracted once with 250 mL and extracted three times with 140 mL of diethyl ether.The combined organic phases were dried with MgSO Subsequently, the residual dimethylformamide was removed under reduced pressure at a water temperature of 55 C over 2 hours to obtain 13.4 g of an orange liquid.Purification by flash chromatography using petroleum ether / ethyl acetate 4:1: petroleum ether / ethyl acetate 2:1 as eluent to afford white solid, yield: 14.16 g (82%, 52.0 mmol)., 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; Shaoxing University; Hu Chunqi; Li Xin; Shi Yaru; Du Wenting; Tong Jie; Su Wanting; Xia Weiqi; (20 pag.)CN108610332; (2018); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

115619-01-7, 4-(4-Ethylpiperazin-1-yl)phenylamine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a 0.342 g of 4-(4-ethylpiperazine-1-yl)phenylamine (4d;0.00167 mol) in a dry round bottom flask was added 10 mL 98%ethanol. Then 0.265 g of ethyl 2,4-dioxo-6-methylcyclohexanecarboxylate(E164; previously synthesized in our lab)23 was added. The reactionmixture was refluxed for about 6 h and a total of 5 mL additionalethanol was added. The reaction was monitored by thin layer chromatography(dichloromethane: methanol 85/15). After 6 h, the heatwas turned off and reaction continued to stir at room temperatureovernight. After reaction was completed, the reaction was adsorbed ona silica gel and purified by automated flash chromatography (dichloromethane:methanol 75/25) to yield a yellow semi-solid (54)(0.154 g, 30%).1H NMR (300 MHz, d-CDCl3): delta (ppm) 1.099-1.176 (t,3H), 1.276-1.355 (t, 3H), 1.951 (d, 3H), 2.392-2.547 (q, 2H),2.498-2.641 (t, 4H), 3.211-3.244 (t, 4H), 4.239-4.287 (q, 2H), 5.403(s, 1H), 6.873-6.903 (d, 2H), 7.039-7.069 (d, 2H). HRMS (ESI): m/z,Calcd. for C22H31N3O3 [M+H]+: 386.2433, found 386.2564.

115619-01-7, As the paragraph descriping shows that 115619-01-7 is playing an increasingly important role.

Reference£º
Article; Ghoneim, Ola M.; Bill, Ashley; Dhuguru, Jyothi; Szollosi, Doreen E.; Edafiogho, Ivan O.; Bioorganic and Medicinal Chemistry; vol. 26; 14; (2018); p. 3890 – 3898;,
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.694499-26-8,4-((4-Methylpiperazin-1-yl)methyl)-3-(trifluoromethyl)aniline,as a common compound, the synthetic route is as follows.

4-[(4-methyl-1-piperidinyl) methyl] -3- (trifluoromethyl) -benzeneamine (360 mg, 1.33 mmol),N, N-Diisopropylethylamine (273 muL, 1.60 mmol),Dissolve DMAP (1.2 mg, 0.01 mmol) in THF (5.0 mL),3,5-Dibromo-4-methyl- benzoyl chloride (500 mg, 1.6 mmol) was added and stirred at room temperature for 2 hours.Add water and extract with ethyl acetate,It concentrated under reduced pressure with an evaporator.Silica gel column chromatography of the obtained residueThe compound 3 was purified by (chloroform: methanol = 10: 1).(540.0 mg, 0.98 mmol, 73.8%, pale yellow solid) were obtained., 694499-26-8

The synthetic route of 694499-26-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Kyoto University; Arkray Corporation; Saji, Hideo; Kimura, Hiroyuki; Matsuda, Hirokazu; Nakanishi, Shuichi; (27 pag.)JP2019/64986; (2019); A;,
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.314741-39-4,(S)-1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate,as a common compound, the synthetic route is as follows.

(d) [2S]-4-t-Butoxycarbonyl-2-hydroxymethylpiperazine A solution of Example 1(c) in dry tetrahydrofuran (40 ml) at 0 C. was treated with lithium aluminum hydride (0.50 g) and the mixture was stirred at 0 C. for 1.5 hours. The cooled solution was treated dropwise with a solution of 2M sodium hydroxide until a white precipitate had formed. Dichloromethane and anhydrous sodium sulfate were added and the solution was filtered and evaporated to give a pale yellow oil (3.0 g). MS (+ve ion electrospray) m/z 217 (MH+).

314741-39-4, The synthetic route of 314741-39-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; SmithKline Beecham Corporation and SmithKline Beecham p.l.c.; US2003/203917; (2003); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics