Tag: M.W:100-200

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.25057-77-6,1,2-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

A solution of methyl 2-chloropyrimidine-5-carboxylate (500 mg, 2.90 mmol) in dichloromethane (7.50 ml) was added to a stirred solution of 1,2-dimethylpiperazine (331 mg, 2.90 mmol) and N-ethyl-N-propan-2-ylpropan-2-amine (1.26 ml, 7.24 mmol) in dichloromethane (7.25 ml) at room temperature under nitrogen. The resulting solution was stirred at ambient temperature for 5 h. The reaction mixture was concentrated under reduced pressure and the crude product was purified by ion exchange chromatography, using an SCX column. The desired product was eluted from the column using 7M NH3/MeOH and evaporated to dryness to afford impure product. The impure material was purified by silica column chromatography, eluting with a gradient of 0 to 5% 7M NH3/MeOH in dichloromethane. Pure fractions were evaporated to dryness to afford the desired compound (713 mg, 98%) as a yellow solid. 1H NMR (399.9 MHz, DMSO-d6) delta 1.04-1.06 (3H, m), 1.98-2.05 (1H, m), 2.06-2.13 (1H, m), 2.21 (3H, s), 2.78-2.84 (2H, m), 3.14-3.21 (1H, m), 3.81 (3H, s), 4.46-4.55 (2H, m), 8.78 (2H, s). MS: m/z 251 (MH+)., 25057-77-6

The synthetic route of 25057-77-6 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ASTRAZENECA AB; US2008/153812; (2008); 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

59878-57-8, 0.06 mol of methyl o-fluorobenzoate,0.022 mol DIC,6.6 mmol DMAP was added to 100 mL dichloromethane, Stirring to continue stirring at room temperature for 30min,Gradually warming to 45 ~ 50 ,The reaction flask was charged with 1-cyclopropanecarbonylpiperazine (0.08 mol)Continue stirring reaction 9 ~ 10h.After the reaction is completed,Cool to 0 C and stir 45min,filter,The filtrate was washed with water (3 * 50 mL)Dried over anhydrous sodium sulfate,The methylene chloride was evaporated under reduced pressure,It was solid,Compound 2 (15.27 g),The yield was 92.57%Purity 99.92%

As the paragraph descriping shows that 59878-57-8 is playing an increasingly important role.

Reference：
Patent; Shandong Yuxin Pharmaceutical Co., Ltd.; Liu Zhenteng; Sun Yiwei; Li Hua; Gong Wenju; Wang Libiao; (10 pag.)CN107325055; (2017); 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.109-07-9,2-Methylpiperazine,as a common compound, the synthetic route is as follows.

A mixture of 5-chloroindole-2-carboxylic acid (0.196 g) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.288 g) in dichloromethane (10 mL) was treated with 2-Methyl-piperazine (0.15 g) and stirred at ambient temperature for 16 h. The reaction mixture was poured into dichloromethane (50 mL), washed with water, saturated sodium hydrogencarbonate solution and then brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified via silica gel chromatography (0-10% methanol/dichloromethane) to give the title compound (0.229 g). 1H NMR (400 MHz, CDCl3): delta 10.99 (br s, 1 H), 7.55 (d, J = 1.76 Hz, 1 H), 7.33 (d, J = 8.80 Hz, 1 H), 7.14 (dd, J = 1.96, 6.65 Hz, 1 H), 6.63 (br s, 1 H), 4.55 (br s, 2H), 3.23-2.61 (m, 5H), 1.76 (br s, 1 H), 1.08 (d, J = 5.87 Hz, 1 H). MS (electrospray): exact mass calculated for C14H16ClN3O, 277.10; m/z found, 278.1 [M+H]+, 109-07-9

The synthetic route of 109-07-9 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Janssen Pharmaceuticals, Inc.; CARRUTHERS, Nicholas, I.; CHAI, Wenying; DVORAK, Curt, A.; EDWARDS, James, P.; GRICE, Cheryl, A.; JABLONOWSKI, Jill, A.; KARLSSON, Lars; KHATUYA, Haripada; KREISBERG, Jennifer, D.; KWOK, Annette, K.; LOVENBERG, Timothy, W.; LY, Kiev, S.; PIO, Barbara; SHAH, Chandravadan, R.; SUN, Siquan; THURMOND, Robin, L.; WEI, Jianmei; XIAO, Wei; (87 pag.)EP1373204; (2016); 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.13754-38-6,1-Benzoylpiperazine,as a common compound, the synthetic route is as follows.

3.09 (10.0 mmol) of N-(2-bromoethyl)-2-nitrobenzenesulfonamide,1.90 g (10.0 mmol) of benzoylpiperazine and 2.76 g (20.0 mmol) of potassium carbonate were added toThe reaction was carried out in 150 ml of tetrahydrofuran at room temperature for 2 h, warmed to reflux, and the reaction was followed by TLC.After the completion of the reaction, the solvent was evaporated, evaporated, evaporated, evaporated.Column chromatography, 2.59 g of white solid, yield 62%, 13754-38-6

As the paragraph descriping shows that 13754-38-6 is playing an increasingly important role.

Reference：
Patent; East China University of Science and Technology; Xu Xiaoyong; Li Zhong; Chen Xiulei; Li Wei; Jia Haowu; Cao Xiaofeng; Shao Xusheng; Xu Zhiping; (70 pag.)CN108276352; (2018); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

5308-25-8, 1-Ethylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

5308-25-8, General procedure: A mixture of 4-fluoro benzaldehyde (0.259 mL, 0.002 mol), corresponding phenol, thiophenol,or amine (0.002 mol), and a catalytic quantity of potassium carbonate (K2CO3) was refluxed in DMF(20 mL) for 36 h. After completion of the reaction, the mixture was poured into ice water (50 mL),and the precipitated product was filtered, washed with deionized water, dried, and recrystallizedfrom ethanol.

As the paragraph descriping shows that 5308-25-8 is playing an increasingly important role.

Reference：
Article; Osmaniye, Derya; Avu?o Glu, Bet l Kaya; Sa gl?k, Beg m Nurpelin; Levent, Serkan; Acar evik, Ulviye; Atl?, Zlem; Zkay, Yusuf; Kaplanc?kl?, Zafer As?m; Molecules; vol. 23; 4; (2018);,
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.109-07-9,2-Methylpiperazine,as a common compound, the synthetic route is as follows.

Example 30 2-(2-Methoxyphenoxy)-1-methylethyl 3-(3-methyl-1-piperazinyl)-2-pyrazinyl Ether The title compound was prepared according to the procedure described in Example 4, Step 2, starting from 2-chloro-3-[2-(2-methoxyphenoxy)-1-methylethoxy]pyrazine* (150 mg, 0.51 mmol) and 2-methylpiperazine (260 mg, 2.6 mmol) with the exception that a final extraction step between EtOAc and 5% aqueous NaOH was carried out. This gave 118 mg (65%) of the title product. HRMS m/z calcd for C19H26N4O3 (M)+358.2005, found 358.2018. Anal. (C19H26N4O3) C, H, N. *Prepared according to the procedure described in Example 4, Step 1., 109-07-9

109-07-9 2-Methylpiperazine 66057, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; Biovitrum AB; US6465467; (2002); B1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

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

1-(2-Chloroethyl)-4-methylpiperazine (58b) was prepared by refluxing 2-(4- methylpiperazin-1-yl)ethanol (58a) (1.1 g, 7.33 mmol) with thionyl chloride (10 mL). The reaction mixture was cooled to 20 °C, and poured into ice/water. The aqueous solution was then treated with 6-bromo-4-hydroxy-2-methyl-9H-xanthen-9-one (28b) (260 mg, 0.85 mmol), tetrabutylammonium bromide (100 mg), KOH (1.12 g, 20 mmol), and CH2C12 (50mL), and the mixture was stirred for 3 days. The CH2C12 layer was separated, and the aqueous layer was further extracted with CH2C12. The combined CH2C12 extracts were dried (Na2SO4) and the solvent was removed. Chromatography on neutral alumina eluting with 0-20percent hexanes/EtOAc followed by 0-1percent CH2C12/MeOH gave crude material which was re-columned in Si02 eluting with 20percent hexanes/EtOAc to remove impurities, then with0-4percent CH2C12/MeOH to elute 6-bromo-2-methyl-4-(2-(4-methylpiperazin- 1 -yl)ethoxy)-9H- xanthen-9-one (58c): MS (APCI) m/z: 431 and 433 (M+H). This was used directly without further purification., 5464-12-0

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

Reference：
Patent; AUCKLAND UNISERVICES LIMITED; MARSHALL, Andrew James; BUCHANAN, Christina Maree; REWCASTLE, Gordon William; LU, Guo-Liang; FLANAGAN, Jack Urquhart; BONNET, Muriel; SHEPHERD, Peter Robin; JAMIESON, Stephen Michael Frazer; GAMAGE, Swarnalatha Akuratiya; DENNY, William Alexander; (213 pag.)WO2018/83635; (2018); A2;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

5308-25-8, 1-Ethylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Into a solution of l-Methyl-4-nitro-2-trifluoromethyl-benzene (1; 15 g, 73 mmol, 1.0 eq.) in carbon tetrachloride (250 ml) are added NBS (13 g, 98 ml, 73 mmol, 1.0 eq.) and AIBN (1.19 g, 7.3 mmol, 0.1 eq.) as an initiator. The reaction is refiuxed overnight and then partitioned with water. The organic layer is separated and the aqueous layer is extracted with dichloromethane. The combined organic extracts are washed with water, dried over EPO Na2SO4, filtered and concentrated to afford the solids. The solids are dissolved in dichloromethane (300 ml). The clear solution is treated with DIEA (12.55 ml, 73 mmol, 1.0 eq.) and N-Ethylpiperazine (8.25 g, 73 mmol, 1.0 eq.). The reaction mixture is stirred at room temperature for 30 minutes (until the completion of reaction as per LCMS). The reaction mixture is washed with water, dried over Na2SO4, filtered and concentrated to afford the crude product. The crude product is purified by flash column chromatography using 1 :1 v/v hexanes: ethyl acetate as solvent to afford title compound 2 as a solid., 5308-25-8

5308-25-8 1-Ethylpiperazine 79196, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; IRM, LLC; WO2006/124462; (2006); A2;,
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.

General procedure: A solution of 2-chloroalkyl/aryl substitutedwith or without N-substitution as well as with or without 5 and/or 6-substituted benzimidazole derivative (1.75g,0.01051mol) and 1-[(4-phenyl)carbonyl]piperazine (3g,0.0105mol) in N, N dimethylformamide was taken in a RBF.K2CO3(2gm,) was added to the reaction mixture. The reaction mixture was stirred for 8h at 80C on a magnetic stirrer (heat + stirring). The progress of the reaction was monitored by thin layer chromatography (TLC).Upon completion of the reaction, water was added to the reaction mixture and the product extracted by shaking the reaction mixture with dichloromethane in a separating funnel.The dichloromethane layer was washed successively with water and brine, dried over anhydrous sodium sulfate. Evaporation of the solvent gave theproduct. 11a-l Recrystallized with various solvent like chloroform, ethanol, methanol.

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

Reference：
Article; Kankate, Rani S.; Gide, Parag S.; Belsare, Deepak P.; Oriental Journal of Chemistry; vol. 30; 4; (2014); p. 1855 – 1863;,
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.103-76-4,N-(2-Hydroxyethyl)piperazine,as a common compound, the synthetic route is as follows.

2-(4-Methylpiperazin-1-yl)ethyl 4-nitrophenyl carbonate To a stirred solution of 1-(2-hydroxyethyl)piperazine (26.0 g, 0.2 mol) in DMF (200 mL) was added formic acid (752 mL, 0.2 mol) and formaldehyde (16.2 g, 0.2 mol, 37percent solution in water) The reaction mixture was cautiously heated at 100° C. for 2 hours then stirred overnight at room temperature. The solvent was removed in vacuo. This procedure was repeated 3 further times to give ~100 g of product. The crude products were combined and distilled under vacuum to give, at 74° C., 2-(4-methylpiperazin-1-yl)ethanol (51 g, 44percent) as a colourless liquid. Analytical LCMS: (System C, RT=0.70 min), ES+: 145.1 [MH]+.

103-76-4, 103-76-4 N-(2-Hydroxyethyl)piperazine 7677, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; Biovitrum AB; US2009/281087; (2009); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics