Tag: M.W:100-200

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.13889-98-0,1-Acetylpiperazine,as a common compound, the synthetic route is as follows.

Example 12[4-(3,3-Bis-{4-[3-(4-acetyl-piperazin-1-yl)-prop-1-ynyl]-phenyl}allylsulfanyl)-2-methylphenoxy]acetic acidA mixture of 1-piperazin-1-yl-ethanone (15.2 g, 0.119 mol; prepared as described in U.S. Pat. No. 2,973,362), 3-bromopropyne (17 g, 0.143 mol) and potassium carbonate anhydrous (21.5 g, 0.156 mol) in 2-butanone (150 mL) was refluxed for 6 h. A separated solid was filtered off, washed with 2-butanone (80 mL) and 2-butanone was evaporated in vacuo. The residue was purified by vacuum distillation to yield 1-(4-prop-2-ynylpiperazin-1-yl)ethanone, b.p. 115 C./7 Torr).Yield: 12.2 g (62%).M.p. 63-65 C.

13889-98-0, 13889-98-0 1-Acetylpiperazine 83795, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; Novo Nordisk A/S; High Point Phamaceticals LLC; US2011/39841; (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.21043-40-3,1-Cyclopentylpiperazine,as a common compound, the synthetic route is as follows.

General procedure: To a stirred solution of 7 (0.1 mmol, 55 mg) in dry dichloromethane (3 ml) was added the appropriate amine (0.12 mmol, 1.2 equiv) and triethylamine (0.12 mmol) at room temperature. After stirring for overnight, the reaction mixture was purified directly by silica gel column chromatography., 21043-40-3

The synthetic route of 21043-40-3 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Jin, Yan; Liu, Jie; Huang, Wen-Ting; Chen, Shi-Wu; Hui, Ling; European Journal of Medicinal Chemistry; vol. 46; 9; (2011); p. 4056 – 4061;,
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.25057-77-6,1,2-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

A solution of 7-fluoro-1H-quinazoline-2,4-dione (4.1 g, 23 mmol), dimethylpiperazine (6.2 mL, 46 mmol), and tripropylamine (8.7 mL, 46 mmol) in dioxane (55 mL), was cooled to 0 C. and treated with phosphorous oxychloride (6.4 mL, 68 mmol). The reaction mixture was heated to 100 C. for 1 h, cooled to ambient temperature and stirred an additional 16 h. Chloroform (about 200 mL) was added and the mixture was slowly poured over ice. After neutralizing to pH>10 with 25% NaOH (about 30 mL), the organic layer was separated. The aqueous layer was extracted again with chloroform, and the combined organic extracts were dried over sodium sulfate, filtered and concentrated. Silica gel chromatography (10% ethyl acetate in hexanes) afforded 3.7 g (58%) of the desired product as a light brown solid., 25057-77-6

As the paragraph descriping shows that 25057-77-6 is playing an increasingly important role.

Reference：
Patent; Caprathe, Bradley William; Glase, Shelly Ann; Konstantinou, Zissis; Schelkun, Robert Michael; Sheehan, Susan M.; Thomas, Anthony Jerome; Yuen, Po-Wai; US2005/96327; (2005); 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.59702-07-7,1-Methylpiperazin-2-one,as a common compound, the synthetic route is as follows.

59702-07-7, EXAMPLE 14 3-(2-Fluorophenyl)-5-(1-methyl-2-oxopiperazin-4-yl)-[1,2,3]triazolo[1,5-a]quinazoline Prepared from 1-methylpiperazin-2(1H)-one as described for Example 1, step c (0.033 g, 73percent). deltaH (360 MHz; DMSO) 2.91 (3H, s), 3.61 (2H, dd, J=6 and 6), 3.96 (2H, dd, J=6 and 6), 4.24 (2H, s), 7.35-7.40 (2H, m), 7.44-7.46 (1H, m), 7.78 (1H, dd, J=7 and 7), 8.06-8.12 (2H, m), 8.23 (1H, d, J=7), 8.59 (1H, d, J=7); m/z (ES+) 377 (M+H+).

As the paragraph descriping shows that 59702-07-7 is playing an increasingly important role.

Reference：
Patent; Chambers, Mark Stuart; Collins, Ian James; Goodacre, Simon Charles; Hallett, David James; Jones, Philip; Keown, Linda Elizabeth; Maxey, Robert James; Street, Leslie Joseph; US2003/45532; (2003); 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.13889-98-0,1-Acetylpiperazine,as a common compound, the synthetic route is as follows.

A mixture of N-[4-(2-Bromo-ethoxy)-3-(2-methyl-2H-pyrazol-3-yl)-phenyl]-3-methoxy-benzamide (90 mg, 0.21 mmole), and 1-Piperazin-1-yl-ethanone (32 mg, 1.2 eq), and K2CO3 (116 mg, 4.0 eq) in 2 mL DMF was stirred at 120 C. for 20 minutes in microwave. The mixture was purified by HPLC to give title compound as a white solid as TFA salt (97 mg, 97%). 1H NMR (Acetone-d6, 400 MHz) delta 2.07 (s, 3H), 3.30 (sb, 4H), 3.71 (t, J=4.80 Hz, 2H), 3.75 (s, 3H), 3.79 (sb, 2H), 3.87 (s, 3H), 4.60 (t, J=4.80 Hz, 2H), 4.99 (sb, 2H), 6.32 (s, 1H), 7.13 (d, J=8.08 Hz, 1H), 7.23 (d, J=9.09 Hz, 1H), 7.42 (t, J=8.08 Hz, 1H), 7.53 (m, 2H), 7.56 (d, J=7.83 Hz, 1H), 7.82 (s, 1H), 7.94 (dd, J=8.84, 2.53 Hz, 1H), 9.56 (s, NH). Exact mass calculated for C26H31N5O4477.2, found 478.3 (MH+).

13889-98-0, 13889-98-0 1-Acetylpiperazine 83795, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; Teegarden, Bradley; Xiong, Yifeng; Strah-Pleynet, Sonja; Jayakumar, Honnappa; Dosa, Peter I.; Feichtinger, Konrad; Casper, Martin; Lehmann, Juerg; Jones, Robert M.; Unett, David J.; Karoline Choi, Jin Sun; US2007/207994; (2007); 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.27561-62-2,Cyclohexyl(piperazin-1-yl)methanone,as a common compound, the synthetic route is as follows.

General procedure: 5.1.5. General procedure 4 (GP4) A halide intermediate (1.0equiv), amine (0.9-10equiv) and optionally a base (2.7equiv) and halogenating agent (0.5equiv) were mixed together in industrial methylated spirits (15mL per g halide) and heated in a microwave at 150C for 1h, repeating if neccesary. Upon completion of the reaction, the mixture was passed through a phase seperation cartridge, concentrated and purified

27561-62-2, The synthetic route of 27561-62-2 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Kelly, Nicholas M.; Wellejus, Anja; Elbr°nd-Bek, Heidi; Weidner, Morten Sloth; J°rgensen, Signe Humle; Bioorganic and Medicinal Chemistry; vol. 21; 11; (2013); p. 3334 – 3347;,
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

5464-12-0, Compound 132 was synthesized according to the following production scheme.

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

Reference：
Patent; SBI BIOTECH CO., LTD.; CRYSTALGENOMICS, INC.; US2011/190299; (2011); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

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

75336-86-6, i) tert-Butyl (3/?)-3-methylpiperazine-l-carboxylate;To a solution of (2No.)-2-methylpiperazine (Ig) in THF (10ml) was added di-tert-butyldicarbonate (1.45g). The reaction mixture was allowed to stir at room temperaturefor 18h.The reaction mixture was then partitioned between DCM (100 ml) and HaO (100 ml). Theorganics were separated and the aqueous layer was re-extracted with DCM (2 x 150ml).Organics were combined, dried (MgSO4) and reduced in vacuo to give the subtitle compoundas a clear oil. Yield: 1. Ig’H NMR: (DMSO) 8 0.92 (d, 3H), 1.38 (s, 9H), 2.57-2.70 (m, 1H), 2.76-2.81 (m, 1H), 2.87-2.99 (m, 1H), 3.66-3.74 (m, 4H)

The synthetic route of 75336-86-6 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/24823; (2006); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

934-98-5,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.934-98-5,2-(4-Methylpiperazin-1-yl)ethanamine,as a common compound, the synthetic route is as follows.

General procedure: The mixture of 6-bromobenzo[d]thiazol-2-amine (2.0 g, 8.73 mmol), carbonyldimidazole (4.24 g, 26.2 mmol) and dried DMF (20 ml) was stirred at room temperature for 8 h, added cyclopropanamine (0.76 g, 13.2 mmol), then stirred at room temperature for another 8 h. The volatile was removed under reduced pressure. Water (30 ml) was added to the residue. The resulting suspension was stirred. After standing, the solid was collected by filtration, dried to produce 8a (1.77 g, 65percent) as white solid. 4.1.1.7 1-(6-Bromobenzo[d]thiazol-2-yl)-3-(2-(4-methylpiperazin-1-yl)ethyl)urea (8g) White solid; Yield 64percent; mp: 97-99 °C; 1H NMR (CDCl3) delta 7.85 (s, 1H, Ar-H), 7.52 (d, J = 8.6 Hz, 1H, Ar-H), 7.47 (d, J = 8.6 Hz, 1H, Ar-H), 3.49 (s, 2H, CH2), 2.78-2.41 (m, 10H, CH2 CH2*5), 2.35 (s, 3H, CH3). MS (ESI, m/z): Calcd for [M+H]+ C15H21BrN5OS: 398, 400, found 398, 400.

934-98-5 2-(4-Methylpiperazin-1-yl)ethanamine 70284, apiperazines compound, is more and more widely used in various fields.

Reference：
Article; Xie, Xiao-Xiao; Li, Huan; Wang, Juan; Mao, Shuai; Xin, Min-Hang; Lu, She-Min; Mei, Qi-Bing; Zhang, San-Qi; Bioorganic and Medicinal Chemistry; vol. 23; 19; (2015); p. 6477 – 6485;,
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.5317-33-9,3-(4-Methylpiperazin-1-yl)propan-1-ol,as a common compound, the synthetic route is as follows.

5317-33-9, 500 mg of 3-bromo-5-(1H-pyrazol-4-yl)-pyridine, 850 mg of 3-(N-methylpiperazin)- propan-1-ol and 1.69 g of triphenylphosphine are dissolved in dimethylformamide. 1.28 ml of diisopropylazodicarboxylate is added to the reaction. The mixture is stirred over night at room temperature. For workup the mixture is evaporated and dichloromethane is added. The organic phase is washed with diluted HCI. The acidic aqueous phase is neutralized and extracted with dichloromethane. After drying, filtration and evaporation the product is purified by chromatography in ethyl acetate and methanol. 472 mg of 1-{3-[4-(5-bromo-pyridin-3-yl)-pyrazol-1-yl]-propyl}-4- methyl-piperazine are obtained;HPLC-MS: 1.23 min, [M+H] 366 .

As the paragraph descriping shows that 5317-33-9 is playing an increasingly important role.

Reference：
Patent; MERCK PATENT GMBH; HOELZEMANN, Guenter; DORSCH, Dieter; JONCZYK, Alfred; AMENDT, Christiane; ZENKE, Frank; WO2012/3912; (2012); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics