Heterocyclic Building Blocks-piperazine

129799-08-2, 1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

3-methoxy carbonyl-piperazine-1-carboxylate (500mg, 2.05mmol), methyl iodide (580mg, 4.10mmol) andpotassium carbonate (424 mg, 3.07mmol) was added to 50mL sealed tube was added acetone (10mL), 50 Cthe reaction is stopped after 6h the reaction, the solvent was removed, plus Water (20 mL), dichloromethane(10mL ¡Á 3) was extracted, dried over anhydrous sodium sulfate, the solvent was removed, and concentrated togive a pale yellow solid 290mg: 3- Methoxycarbonyl-4-methyl-piperazine-1-carboxylate, yield: 54%., 129799-08-2

The synthetic route of 129799-08-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Guangdong East Sunshine Pharmaceutical Co., Ltd; Zhang, Ying jun; Liu, Bing; Yu, Tian Zhu; Zhang, Xiang Yu; (348 pag.)CN105399698; (2016); A;,
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74879-18-8, (S)-(+)-2-Methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 11 2-(2-methylimidazo[l,2-b]pyridazin-6-yl)-7-[(3S)-3-methylpiperazin-l-yl]pyrido[l,2- a]pyrimidin-4-one In a sealed tube, 7-fluoro-2-(2-methylimidazo[l,2-b]pyridazin-6-yl)-4H-pyrido[l,2- a]pyrimidin-4-one (Intermediate 1; 50 mg, 0.169 mmol), and (S)-2-methylpiperazine (68 mg, 0.677 mmol, 4.0 eq.) were stirred in DMSO (2 mL) at 110C overnight. The solvent was removed under high vacuum. The residue was taken up in CH2CI2 and washed with an aqueous saturated solution of NaHC03. The organic layer was separated and dried over Na2S04 and concentrated in vacuo. The crude was purified by column chromatography (S1O2, CH2Cl2/MeOH=95/5 to 90/10) to afford the title product (40 mg, 63%) as a light yellow solid. MS m/z 376.2 [M+H+]., 74879-18-8

As the paragraph descriping shows that 74879-18-8 is playing an increasingly important role.

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; PTC THERAPEUTICS INC.; RATNI, Hasane; GREEN, Luke; NARYSHKIN, Nikolai A.; WEETALL, Marla L.; (80 pag.)WO2015/173181; (2015); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.75336-86-6,(R)-2-Methylpiperazine,as a common compound, the synthetic route is as follows.

Intermediate 22: (3R)-1 -(4′-fluorobiphenyl-4-yl)-3-methylpiperazine; ,FA mixture of (R)-2-methylpiperazine (2.2 g, 22.1 mmol, 1.0 eq.), tris(dibenzylidene acetone)dipalladium(O) (607 mg, 0.66 mmol, 0.03 eq.) and (+/-)-BINAP (137 mg, 0.22 mmol; 0.01 eq.) in toluene was degassed 15 min under N2. 4-bromo^T-fluorobiphenyl (4.99 g, 19.9 mmol, 0.90 eq.) was added followed by sodium tert-butoxide (2.97 g, 30.9 mmol, 1.4 eq.). The resulting mixture was heated to 90¡ãC for 14h. The reaction was cooled to room temperature, filtered on a bed of cellite and washed with Et2O. The combined organic layers were then washed with H2O (3x), dried over MgSO4, filtered and evaporated to give a dark brown oil. This residue was purified by chromatography on silicagel (DCM/MeOH 20/80) to give the title product as off white solid (3.0 g, 50percent) M+(ESI): 271.3. HPLC (Condition A), Rt: 2.8 min (HPLC purity: 99.8 percent)., 75336-86-6

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

Reference£º
Patent; Applied Research Systems ARS Holding N.V.; WO2006/10751; (2006); A1;,
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120737-78-2, tert-Butyl 2-methylpiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution of 7-(3,4-dimethoxyphenyl)-5-methyl-4-oxo-4,5-dihydrothieno[3,2-c]pyridine-2- carbaldehyde (for a preparation see Intermediate 25, 100 mg, 0.304 mmol) in DCM (5 mL) was added acetic acid (0.026 mL, 0.455 mmol) and ierf-butyl 2-methylpiperazine-1 -carboxylate (0.073 mL, 0.364 mmol) and the reaction mixture was stirred under nitrogen at room temperature for one hour. Sodium triacetoxyborohydride (322 mg, 1.518 mmol) was then added and the reaction was refluxed under nitrogen overnight. The reaction mixture was allowed to cool to room temperature and was then hydrolyzed with a saturated aqueous solution of sodium bicarbonate (20 mL). The layers were separated and the aqueous phase was extracted with DCM (3 x 10 mL). The combined organic layers were washed with a saturated aqueous solution of sodium chloride solution (approx. 20 mL), dried over magnesium sulphate, filtered and concentrated under vacuum to give a light brown residue. The residue was purified by chromatography on silica gel eluting with 0 to 5% MeOH in DCM. The appropriate fractions were combined to give an impure light brown residue. The product was therefore loaded onto a 2g SCX column and was flushed with MeOH (3 column volumes). The product was eluted in 2.0M ammonia in MeOH (3 column volumes) and concentrated to give ferf-butyl 4-((7-(3,4-dimethoxyphenyl)-5-methyl-4-oxo-4,5-dihydrothieno[3,2-c]pyridin-2- yl)methyl)-2-methylpiperazine-1-carboxylate (1 10 mg, 71 % yield) as a yellow oil. LCMS (2 min, Formic Acid): Rt = 0.90 min, MH+ = 514, 120737-78-2

120737-78-2 tert-Butyl 2-methylpiperazine-1-carboxylate 15087784, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; GLAXOSMITHKLINE LLC; AMANS, Dominique; BAMBOROUGH, Paul; BIT, Rino, Antonio; BROWN, John, Alexander; CAMPBELL, Matthew; LINDON, Matthew, John; SHIPLEY, Tracy, Jane; THEODOULOU, Natalie, Hope; WELLAWAY, Christopher, Roland; WESTAWAY, Susan, Marie; WO2014/78257; (2014); A1;,
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120737-78-2, tert-Butyl 2-methylpiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a greenhouse test tube was added rac-benzyl ((2S,3R,4R)-1-acetyl-6-bromo-2-cyclopropyl-3- methyl-I ,2,3,4-tetrahydroq uinolin-4-yl)carbamate (for a preparation see Intermediate 3, 101 mg,0.234 mmol), sodium tert-butoxide (65 mg, 0.676 mmol), DavePhos (18.1 mg, 0.046 mmol),Pd(dba)3 (21.9 mg, 0.024 mmol) and 1,4-dioxane (2 mL). tert-Butyl 2-methylpiperazine-1- carboxylate (0.070 mL, 0.351 mmol) was then added and the reaction mixture stirred at 100 C for 20 h 45 mm. The reaction mixture was allowed to cool to rt and then filtered through a pad of celite and rinsed with ethyl acetate. The filtrate was concentrated and purified by MDAP (Formic) to give the product (14.1 mg, 0.034 mmol, 14.46%) as a pale yellow gum. This was a racemic mixture ofdiatereoisomers. LCMS (2 mm Formic): Rt = 0.77 mi [MH] = 417.

120737-78-2, The synthetic route of 120737-78-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY (NO.2) LIMITED; AMANS, Dominique; ATKINSON, Stephen John; HARRISON, Lee Andrew; HIRST, David Jonathan; LAW, Robert Peter; LINDON, Matthew; PRESTON, Alexander; SEAL, Jonathan Thomas; WELLAWAY, Christopher Roland; WO2014/140076; (2014); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.262368-30-9,N-(4-Aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide,as a common compound, the synthetic route is as follows.

General procedure: To a suspension of methyl (Z)-1-acetyl-3-(ethoxy(phenyl)methylene)-2-oxoindoline-6-carboxylate (6) (500 mg,1.368 mmol) in DMF (3.5 mL) was added N-(4-aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide (14) (395 mg,1.505 mmol, 1.1 equiv.) at RT. After heating the reaction mixture at 80 C for 1 h, it was allowed to cool to RT. Piperidine (297 lL,3.010 mmol, 2.2 equiv.) was then added and stirred for 2 h. Volatiles were removed in vacuo and water was added to the obtained residue and stirred for 15 min. The precipitate was then filtered under suction and cake was washed with water, then with minimum amount of cold methanol, and then ether. The obtained product was purified by column chromatography (neutral Al2O3,0-10% methanol in CH2Cl2) to afford 532 mg (72%) of target molecule 15., 262368-30-9

The synthetic route of 262368-30-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Edupuganti, Ramakrishna; Taliaferro, Juliana M.; Wang, Qiantao; Xie, Xuemei; Cho, Eun Jeong; Vidhu, Fnu; Ren, Pengyu; Anslyn, Eric V.; Bartholomeusz, Chandra; Dalby, Kevin N.; Bioorganic and Medicinal Chemistry; vol. 25; 9; (2017); p. 2609 – 2616;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.5308-25-8,1-Ethylpiperazine,as a common compound, the synthetic route is as follows.,5308-25-8

General procedure: A solution of compound 2 (0.55 mmol), 1-substituted piperazine (0.83 mmol) and pyridine (0.8 mmol) in 10 mL THF (tetrahydrofuran) was stirred at room temperature overnight. When the reaction was completed, the solvent was evaporated under reduced pressure. The residues were dissolved in ethyl acetate and washed with water and saturated sodium chloride solution. After drying over anhydrous Na2SO4, the solvent was removed under reduced pressure to get crude product. The pure products were obtained by recrystallizing from ethanol.

The synthetic route of 5308-25-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Wu, Zhilin; Ding, Na; Tang, Yuting; Ye, Jiao; Peng, Junmei; Hu, Aixi; Research on Chemical Intermediates; vol. 43; 8; (2017); p. 4833 – 4850;,
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5294-61-1, N-(2,6-Dimethylphenyl)-2-(piperazin-1-yl)acetamide is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Part C. Synthesis of N-(2,6-dimethylphenyl)-2-[4-(2-chloroacetyl)piperazinyl]acetamide (9) To a solution of 5 (1g, 4mmol) in 15ml THF was added chloroacetic anhydride (0.692g, 4mmol). The solution was heated to reflux for one hour. The solvent was evaporated in vacuo and the residue was purified using flash chromatography to yield compound 9., 5294-61-1

Big data shows that 5294-61-1 is playing an increasingly important role.

Reference£º
Patent; Blackburn, Brent K.; Zablocki, Jeff; Elzein, Elfatih; Nudelman, Grigory; US2001/44541; (2001); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.162046-66-4,4-(4-(tert-Butoxycarbonyl)piperazin-1-yl)benzoic acid,as a common compound, the synthetic route is as follows.

Example 36 Preparation of N -(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-4-(piperazin-1-yl) benzamide hydrochloride To a solution of 4-(4-(tert-butoxycarbonyl)piperazin-1-yl)benzoic acid (commercial) (109 mg,357 flmol) in N,N-dimethylformamide (1.00 ml) under nitrogen at room temperature, wereadded HA TU ( 0-(7-azabenzotriazol-1-yl)-N ,N ,N’ ,N’-tetramethyluronium hexafluorophosphate)(204 mg, 536 flmol) and N-ethyldiisopropylamine (185 mg, 243 f..Ll, 1.43 mmol). After 5 minutesstirring at room temperature, 8-fluoro-2-methyl-imidazo[1,2-a]pyridin-6-ylamine hydrochloride (Example B.4) (72 mg, 357 flmol) was added. The mixture was stirred at room temperature for21 hours and then at 60C for 2 hours. The solvent was removed in vacuo. The residue was taken in a saturated aqueous solution of bicarbonate and extracted three times with ethyl acetate. The combined extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude oil was purified on silica gel (Eluent: heptane/ethyl acetate 0 to 10%) to provide 78 mg of tert-butyl 4-(4-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-ylcarbamoyl)phenyl)piperazine-1-carboxylate. To a suspension of this compound (40 mg, 88.2 flmol) in methanol (400 f..Ll) was added HC14M in dioxane (221 f..Ll, 882 flmol). The light yellow suspension was stirred at roomtemperature for 17 hours. The solid was filtered, washed with ether and hexane and dried toprovide 25 mg (72.7 %) of the title compound as a light yellow solid., 162046-66-4

162046-66-4 4-(4-(tert-Butoxycarbonyl)piperazin-1-yl)benzoic acid 2795508, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; PTC THERAPEUTICS INC.; DAKKA, Amal; GREEN, Luke; KARP, Gary; NARASIMHAN, Jana; NARYSHKIN, Nikolai; PINARD, Emmanuel; QI, Hongyan; RATNI, Hasane; RISHER, Nicole; WEETALL, Marla; WOLL, Matthew; WO2014/209841; (2014); A2;,
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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

A mixture of 6-bromo-4,7-dichloroquinazoline (300 mg, 1.08 mmol), tert-butyl methyl piperazine-1,2-dicarboxylate (395 mg, 1.62 mmol), DIEA (836 mg, 6.48 mmol) in 1,4-dioxane (8 mL) was stirred at 80C for 1 h. The mixture was allowed to cool to RT, quenched with saturated NaHCO3 solution and then extracted with ethyl acetate. The organic layer was washed with brine, dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by flash column chromatography onsilica gel (ethyl acetate/petroleum ether = 1:5) to afford the desired product (367 mg,70% yield) as a white solid., 129799-15-1

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

Reference£º
Patent; ARAXES PHARMA LLC; JANES, Matthew, Robert; PATRICELLI, Matthew, Peter; LI, Liansheng; REN, Pingda; LIU, Yi; (397 pag.)WO2016/44772; (2016); A1;,
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