Tag: M.W:200-300

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.259808-67-8,1-Boc-3,3-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

To a solution of the product from the previous step (1.0 g, 4.7 mmol) in CH2Cl2 (20 mL) at 0 C were added TEA (2.0 ml, 14 mmol) and methanesulfonyl chloride (0.641 g, 5.60 mmol) and the resulting mixture was stirred RT for 3 h. The mixture was concentrated under reduced pressure. The residue was purified via silica gel chromatography (5 – 100 % EtOAc in hexanes) to afford a colorless liquid. The residue was taken up in CH2CI2 (20 mL), 4 N HCl in dioxane (3.5 mL, 14 mmol) was added and the mixture was stirred at RT for 14 h. A white ppt was collected by vacuum filtration to afford the title compound (716 mg, 80 % yield).

259808-67-8, As the paragraph descriping shows that 259808-67-8 is playing an increasingly important role.

Reference£º
Patent; BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM; CHEMPARTNER CORPORATION; DI FRANCESCO, Maria, Emilia; JONES, Philip; CARROLL, Christopher, Lawrence; CROSS, Jason, Bryant; JOHNSON, Michael, Garrett; LIVELY, Sarah; (187 pag.)WO2018/218197; (2018); A2;,
Piperazine – Wikipedia
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314741-39-4, (S)-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

A solution of Example 1(c) in dry tetrahydrofuran (40ml) at 0C was treated with lithium aluminium hydride (0.50g) and the mixture was stirred at 0C 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 (3.0g). MS (+ve ion electrospray) m/z 217 (MH+).

314741-39-4, 314741-39-4 (S)-1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate 1501855, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; SmithKline Beecham plc; EP1187828; (2004); B1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

122833-04-9, 2-Methoxy-4-(4-methylpiperazin-1-yl)aniline is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

2-(methylsulfonyl)-4-(3-nitrophenoxy)pyrazolo[l ,5-a][ l ,3,5]triazine (7, 0.25 g, 0.74 mmol), 2-methoxy-4-(4-methylpiperazin- l -yl)aniline (8, 0.164 g, 0.74 mmol), Cul (14 mg, 0.074 mmol), L- proline (17 mg, 0.14 mmol) and K3P04 (0.474 g, 2.2 mmol) in DMF (5 mL) was stirred at 80 C for overnight. Reaction was monitored by TLC and LCMS. After completion of the reaction, water was added and extracted with ethyl acetate. Organic layer was washed with brine, dried over anhydrous sodium sulfate and evaporated under reduced pressure. Crude product was purified by column chromatography using 3% MeOH-DCM to afford N-(2-methoxy-4-(4-methyIpiperazin- l -yl)phenyl)- 4-(3-nitrophenoxy) pyrazolo[ l ,5-a][ l ,3,5]triazin-2-amine (9, 0.15 g, 42%). NMR (400 MHz, CDjOD): delta 8.20-8.18 (m, 2H), 8.10 (s, 1 H), 7.70-7.45 (m, 3H), 6.65 (s, 1 H), 6.40-6.30 (d, 1 H), 6.25 (s, 1 H), 3.95 (s, 3H), 3.30-3.20 (t, 4H), 2.70-2.60 (t, 4H), 2.32 (s, 3H).

122833-04-9, 122833-04-9 2-Methoxy-4-(4-methylpiperazin-1-yl)aniline 20136253, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; GATEKEEPER PHARMACEUTICAL, INC.; GRAY, Nathanael, S.; ZHOU, Wenjun; WO2011/79231; (2011); A1;,
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548762-66-9, (2S,5R)-tert-Butyl 2,5-dimethylpiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a stirred solution of tert-butyl (2S,5R)-2,5-dimethylpiperazine-1-carboxylate (1.5 g, 7. mmol) in acetonitrile (15 mL) was added DIPEA (3.7 mL, 21 mmol) and methyl 2-bromo-2-(4-fluorophenyl)acetate (1.9 g, 7.7 mmol). The reaction mixture was heated up to 85 C over 10 min and was stirred for 16 h. The reaction mixture was concentrated under reduced pressure to obtain a brown gummy solid. The crude compound was purified by flash chromatography (using 24 g silica gel column; using 5 % -10 % ethylacetate/ Pet. ether) to obtain tert-butyl (2S,5R)-4-(1-(4-fluorophenyl)-2-methoxy-2- oxoethyl)-2,5-dimethylpiperazine-1-carboxylate (2.35 g, 6.18 mmol, 88% yield) as brown solid. LCMS: m/z, 379.3 (M-H); rt 1.13 min; Column: Waters Acquity UPLC BEH C18 (2.1 x 50 mm) 1.7 mm, Mobile phase A: 10 mM ammonium acetate:acetonitrile (95:5); Mobile phase B: 10 mM ammonium acetate:acetonitrile (5:95), Gradient = 20-90 % B over 1.1 minute, then a 0.6 minute hold at 90 % B; Temperature: 50 C; Flow rate: 0.7 mL/min; Detection: UV at 220 nm., 548762-66-9

As the paragraph descriping shows that 548762-66-9 is playing an increasingly important role.

Reference£º
Patent; BRISTOL-MYERS SQUIBB COMPANY; VELAPARTHI, Upender; CHUPAK, Louis S.; DARNE, Chetan Padmakar; DING, Min; GENTLES, Robert G.; HUANG, Yazhong; KAMBLE, Manjunatha Narayana Rao; MARTIN, Scott W.; MANNOORI, Raju; MCDONALD, Ivar M.; OLSON, Richard E.; RAHAMAN, Hasibur; JALAGAM, Prasada Rao; ROY, Saumya; TONUKUNURU, Gopikishan; VELAIAH, Sivasudar; WARRIER, Jayakumar Sankara; ZHENG, Xiaofan; TOKARSKI, John S.; DASGUPTA, Bireshwar; REDDY, Kotha Rathnakar; RAJA, Thiruvenkadam; (0 pag.)WO2020/6018; (2020); A1;,
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Piperazines – an overview | ScienceDirect Topics

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.

Preparation of the Final Compounds: (cr) 3-Z-[1-(4-(N-(4-methyl-piperazin-1-yl-methylcarbonyl)-N-methyl-amino)-anilino)-methylene]-6-ethylcarbamoyl-2-indolinone 160 mg 3-(1-hydroxy-methylene)-6-ethylcarbamoyl-2-indolinone (starting material VIII) and 543 mg N-[(4-methyl-piperazin-1-yl)-methylcarbonyl]-N-methyl-p-phenylendiamine are dissolved in 3 ml of tetrahydrofuran, 506 ml trimethylsilylimidazole are added and the mixture is stirred for 25 minutes at 170 C. in a microwave oven. After cooling the solvent is evaporated and the residue is purified over an aluminum oxide column (activity 2-3) with methylene chloride/ethanol (19:1) as eluant. The residue is recrystallized from ether and vacuum-dried at 80 C. Yield: 0.17 g (52% of theory), Rf value: 0.60 (aluminum oxide, methylene chloride/methanol=9:1) Melting point: 255-260 C. C26H32N6O3 Mass spectrum: m/z=477 [m+H]+, 262368-30-9

As the paragraph descriping shows that 262368-30-9 is playing an increasingly important role.

Reference£º
Patent; Boehringer Ingelheim International GmbH; US2006/142373; (2006); A1;,
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,115619-01-7

In a RB flask fitted with rubber septum and Argon baloon, 2-chloro-4-(2-(3-nitrophenyl)- 5,6-dihydro-4H-cyclopenta[b]thiophen-3-yl)pyrimidine (0.140 mmol), p-TSA (0.279 mmol) and 4-(4-ethylpiperazin- 1 -yl)aniline (0.168 mmol) were taken in NMP. The reaction mixture was heated at 110 C for 12-14 h. The reaction mixture was cooled, diluted with saturated aqueous NaHC03 and extracted with ethyl acetate. The combined organic layers were washed with water, dried over anhydrous Na2S04 and concentrated. The crude reaction mixture was purified by silica gel column chromatography. Yield = 87% (0779) XH NMR (CDC13, 300 MHz) delta: 8.33 (s, 1H), 8.30 (d, / =4.8Hz, 1H), 8.11 (d, / =7.8Hz, 1H), 7.61 (d, =7.5Hz, 1H), 7.43 (t, J =7.8, 8.1Hz, 1H), 7.25 (d, =8.7Hz, 2H), 6.96 (s, 1H), 6.82 (d, =8.4Hz, 1H), 6.56 (d, =5.1Hz, 1H), 3.17 (m, 2H), 3.03 (m, 2H), 2.92 (m, 2H), 2.65 (m, 4H), 2.52 (m, 4H), 1.27 (s, 2H), 1.16 (t, = 6.9, 7.2Hz, 3H). Mass: 527 (M+l)

The synthetic route of 115619-01-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PIRAMAL ENTERPRISES LIMITED; ROYCHOWDHURY, Abhijit; SHARMA, Rajiv; GADEKAR, Pradip, Keshavrao; URUNKAR, Ganesh, Devidas; SEELABOYINA, Balapadmasree; DEKA, Nabajyoti; DAWANGE, Mahesh, Balasaheb; B-RAO, Chandrika; KHANNA, Smriti; WO2015/128698; (2015); 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.278788-60-6,(R)-1-Boc-Piperazine-2-carboxylic acid,as a common compound, the synthetic route is as follows.

PREPARATIVE EXAMPLE 6; The tricyclic alcohol [] (5.6 gm, 17.33 mmol) was dissolved in CH2Cl2 (56 mL) and SOCl2 (2.46 mL) was added while stirring under a dry N2 atmosphere. After 5 hrs. the tlc was checked ( by adding an aliquot of the reaction mixture to 1N NaOH and shaking with CH2Cl2 and checking the CH2Cl2 layer by tlc using 50percent EtOAc/Hexanes as the eluent). The mixture was evaporated to give a gum which was evporated from dry toluene twice and once from CH2Cl2 to give a foamy solid. The resulting chloro-tricyclic compound was dissolved in dry DMF (100 mL) and the title compound from Preparative Example 5 (3.98 gm) was added followed by triethylamine (12.11 mL) and the mixture stirred at ambient temperature under a nitrogen atmosphere. After 24 hours, the reaction mixture was concentrated and the residue dissolved in EtOAc (200 mL) and washed with brine. The brine layer was extracted with EtOAc (2X) and the combined organics were dried over MgSO4, filtered, and evaporated to give a foamy solid. The solid was chromatographed on a 1 1/2″ X 14″ column of silica gel eluting with 2L of 0.4percent 7N MeOH/NH3:CH2Cl2, 6L of 0.5percent 7N MeOH/NH3:CH2Cl2, 2L of 0.65percent 7N MeOH/NH3:CH2Cl2, 2L of 0..8percent 7N MeOH/NH3:CH2Cl2, 4L of 1percent 7N MeOH/NH3:CH2Cl2, 2L of 3percent 2N MeOH/NH3:CH2Cl2, 2L of 5percent 2N MeOH/NH3:CH2Cl2, 2L of 10percent 2N MeOH/NH3:CH2Cl2, 2L of 15percent 2N MeOH/NH3:CH2Cl2, 4L of 20percent 2N MeOH/NH3:CH2Cl2 to obtain 4.63 gm of final product.

278788-60-6, 278788-60-6 (R)-1-Boc-Piperazine-2-carboxylic acid 24820285, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; SCHERING CORPORATION; EP1140904; (2005); B1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

3022-15-9, Piperazine-2-carboxylic acid dihydrochloride is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Intermediate 1 : 1 ,4-Bis{[(1 ,1 -Dimethylethyl)oxy]carbonyl}-2- piperazinecarboxylic acidTo a solution of 2-piperazinecarboxylic acid (10 g) dihydrochloride in methanol (500 mL) at 0 C was added triethylamine (28.8 mL) dropwise via a dropping funnel. After addition, the solution was stirred for 30 minutes and then cooled to 0 C before addition of di-tert-butyl dicarbonate (27.4 mL). The reaction was stirred for 18 h at room temperature. The reaction mixture was concentrated under vacuum and then partitioned between ethyl acetate (500 ml) and water (500 mL). The organic phase was washed with further water (500 mL) and then brine (300 mL) before it was dried (Na2S04), filtered and the solvent removed under vacuum to give an oil of 3g, which was discarded. The aqueous layer was acidified to pH 2 with 5M HCI and then extracted with ethyl acetate (2 x 700 mL). The organic phase was dried (Na2S04), filtered and the solvent removed under vacuum to give the title compound as a white solid (14.58 g).LCMS (low pH) RT 0.98 min : m/z (ES) 331 [M+H]+, 3022-15-9

The synthetic route of 3022-15-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; CONVERGENCE PHARMACEUTICALS LIMITED; NORTON, David; ANDREOTTI, Daniele; WARD, Simon E; PROFETA, Roberto; SPADA, Simone; PRICE, Helen Susanne; WO2012/98400; (2012); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

170911-92-9, tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a solution of 2a (1.0 g, 3.6 mmol) in dichloromethane (30 mL)was added 1,1?-thiocarbonyldiimidazole (1.2 g, 7.2 mmol) at roomtemperature. The reaction mixture was stirred at room temperature for1 h. The solvent was removed in vacuo and the residue was purified bysilica gel chromatography (Developing solvent: petroleum ether (PE)/ethyl acetate (EA)=20/1) to give 3a (1.0 g, yield 87.2%). 1H NMR(300 MHz, DMSO-d6): delta 1.42 (s, 9H), 3.08-3.23 (m, 4H), 3.37-3.52 (m,4H), 6.96 (d, J=8.7 Hz, 2H), 7.29 (d, J=8.7 Hz, 2H)., 170911-92-9

The synthetic route of 170911-92-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Bao, Jiyin; Liu, Haichun; Zhi, Yanle; Yang, Wenqianzi; Zhang, Jiawei; Lu, Tao; Wang, Yue; Lu, Shuai; Bioorganic Chemistry; vol. 94; (2020);,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

655225-01-7, tert-Butyl 4-(2-bromoethyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,655225-01-7

The compound obtained in Example 138-5 (141 mg, 0.54 mmol) was dissolved in DMF (2.8 ml). Thereto cesium carbonate (209 mg, 0.64 mmol), tert-butyl 4- (2-bromomethyl) piperazine-1-carboxylate (317 mg, 1.08 mmol), potassium iodide (179 mg, 1.08 mmol) was added to 70 and the mixture was stirred overnight at . After the reaction, the solvent was evaporated. The residue was purified by silica gel column chromatography (Chromatorex NH 10 g, hexane / ethyl acetate) to give the title compound (246 mg, 95.8percent) as a yellow oil.

The synthetic route of 655225-01-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Yakult Honsha Co., Ltd.; University of Occupational and Environmental Health; Ono, Masahiro; Kobayashi, Tsuneyuki; Yamazaki, Ryuta; Haibara, Hirotake; Nishiyama, Yukiko; Hokkyo, Atsuko; Nishiyama, Hiroyuki; Kurita, Akinobu; Matsuzaki, Ken; Kono, Kimitoshi; Izumi, Hiroto; (215 pag.)JP2016/124812; (2016); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics