Tag: M.W:200-300

314741-40-7, (S)-tert-Butyl 3-(hydroxymethyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

2,6-difluoro-3-(oxiran-2-yl)benzonitrile (1.50 g, 8.28 mmol) and (S)-4-N-BOC-2-hydroxymethylpiperazine (2.40g, 11.1 mmol) were suspended in ethanol (15 mL) then heated in a microwave apparatus for 30 min at 150 C. Thereaction mixture was cooled and evaporated dryness. The residue was purified by chromatography through a 120gRedi-sep column eluting with 5%MeOH/95% EtOAc to yield the title compound LC-MS: M+1 = 398

314741-40-7, The synthetic route of 314741-40-7 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Merck Sharp & Dohme Corp.; PASTERNAK, Alexander; BLIZZARD, Timothy; CHOBANIAN, Harry; DE JESUS, Reynalda; DING, Fa-Xiang; DONG, Shuzhi; GUDE, Candido; KIM, Dooseop; TANG, Haifeng; WALSH, Shawn; PIO, Barbara; JIANG, Jinlong; (128 pag.)EP2744499; (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.76003-29-7,1-Boc-3-Oxopiperazine,as a common compound, the synthetic route is as follows.

A mixture of 1 ,1-dimethylethyl 3-oxo-1-piperazinecarboxylate (0.200 g, 0.999 mmol), 1-bromo-4-fluorobenzene (0.091 mL, 0.832 mmol), copper(l) iodide (0.008 g, 0.042 mmol), potassium carbonate (0.230 g, 1.665 mmol) and N,N’-dimethyl-1 ,2- ethanediamine (0.009 mL, 0.083 mmol) in toluene (5 mL) was heated at reflux under nitrogen overnight. The reaction mixture was filtered through silica gel. The filtrate was evaporated and the residue was purified by silica gel chromatography (EtOAc:hexane) to give1 ,1-dimethylethyl 4-(4-fluorophenyl)-3-oxo-1-piperazinecarboxylate (0.180 g, 73%) as a white solid., 76003-29-7

76003-29-7 1-Boc-3-Oxopiperazine 3157178, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; GLAXOSMITHKLINE LLC; BANKA, Anna; CATALANO, John, G.; CHONG, Pek, Yoke; FANG, Jing; GARRIDO, Dulce, Maria; PEAT, Andrew, James; PRICE, Daniel, J.; SHOTWELL, John, Brad; TAI, Vincent; ZHANG, Huichang; WO2011/41713; (2011); A2;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

120737-59-9, tert-Butyl 3-methylpiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution OF RAC-3-METHYL-PIPERAZINE-L-CARBOXYLIC acid tert-butyl ester (350 mg, 1.75 mmol) in dimethylformamide (3 ml) were added 2-Iodo-5-methanesulfonyl-benzoic acid (540 mg, 1.67 mmol), N-ETHYLDIISOPROPYLAMINE (1. 8 ml, 10.5 mmol), and TBTU (630 mg, 1.92 mmol). The reaction mixture was then allowed to stir at room temperature for 16 hours. The reaction mixture was then concentrated in vacuo and the residue was purified by column chromatography (SI02, 20g, Heptane/EtOAc 0-100percent) to give the title compound (400 mg, 45 percent). MS (m/e): 526.2 (M+NH4+).

120737-59-9, As the paragraph descriping shows that 120737-59-9 is playing an increasingly important role.

Reference：
Patent; F. HOFFMANN-LA ROCHE AG; WO2005/23260; (2005); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

78818-15-2, Benzyl 3-oxopiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 98 1-(4-methoxyphenyl)-3-(methylsulfonyl)-6-[4-(2-oxo-1-piperazinyl)phenyl]-1,4,5,6-tetrahydro-7H-pyrazolo[3,4-c]pyridin-7-one To 6-(4-iodophenyl)-1-(4-methoxyphenyl)-3-(methylsulfonyl)-1,4,5,6-tetrahydro-7H-pyrazolo(3,4-c)pyridin-7-one (0.55 g, 1.0 mmol), 4-benzyloxycarbonylpiperazin-2-one (0.35 g,1.4 mmol),and K2CO3 (0.23 g,1.6 mmol) was added DMSO (5 mL). The mixture was degassed with N2. CuI (39 mg, 0.21 mmol) was added and the reaction was heated to 130 C. for 18 h. The reaction was diluted with EtOAc and water, extracted with EtOAc, and dried (MgSO4). Purification of the intermediate by chromatography on silica gel using 5%MeOH/CH2Cl2 was followed by deprotection in refluxing TFA. Purification by HPLC and freeze-drying afforded 175 mg (27%) of a white solid; High Resolution Mass Spec (M+H)+for C24H26N6O5S 496.1650.

78818-15-2, As the paragraph descriping shows that 78818-15-2 is playing an increasingly important role.

Reference：
Patent; Pinto, Donald J.P.; Quan, Mimi L.; Orwat, Michael J.; Li, Yun-Long; Han, Wei; Qiao, Jennifer X.; Lam, Patrick Y.S.; Koch, Stephanie L.; US2003/191115; (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.694499-26-8,4-((4-Methylpiperazin-1-yl)methyl)-3-(trifluoromethyl)aniline,as a common compound, the synthetic route is as follows.

A mixture of 7-(6-Chloro-pyrimidin-4-yloxy)-isoquinoline-4-carboxylic acid (1.95 g, 5.5 mmol), 4-(4- Methyl-piperazin-1-ylmethyl)-3-trifluoromethyl-phenylamine (1.5 g, 5.49 mmol) and triethylamine (6.42 mL, 46.2 mMol) in dry DMF (50 mL) is heated under an argon atmosphere at 500C. A solution of propylphosphonic anhydride (5.4 mL, 8.2 mmol) 50% inDMF is then added. After 2 h, the reaction mixture is poured onto an aqueous solution of NaHCO3 and stirred at 00C for 1h. The suspension is then filtered (hyflo) and the solid residue is dissolved in CH2CI2 – MeOH (5:1). The solvent is evaporated off under reduced pressure to afford a crude product which is purified by reversed phase MPLC (Bchi system), yielding, after neutralisation with saturated aqueous NaHCO3, the title compound as a orange solid., 694499-26-8

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

Reference：
Patent; NOVARTIS AG; NOVARTIS PHARMA GMBH; WO2007/31265; (2007); 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.55121-99-8,(4-Aminophenyl)(4-methylpiperazin-1-yl)methanone,as a common compound, the synthetic route is as follows.,55121-99-8

Step 3: l-(4-Bromo-phenyl)-3-[4-(4-methyl-piperazine-l-carbonyl)-phenyl]-urea rTo a solution of (4-amino-phenyl)-(4-methyl-piperazine-l-yl)-methanone (10.0 g, 0.0456 mol) and TEA (4.7 g, 0.0456 mol) in DCM (150 mL) was added 4-bromophenyl isocyanate (10.9 g, 0.0547 mol). The reaction mixture was stirred at room temperature for 12 h. The white solid was obtained and was filtered and dried to afford the title compound [15.0 g, 79%]; LC-MS (ESI): Calculated mass: 416.1; Observed mass: 417.1 [M+H]+ (RT: 0.23 min).

As the paragraph descriping shows that 55121-99-8 is playing an increasingly important role.

Reference：
Patent; ENDO PHARMACEUTICALS INC.; SMITH, Roger, Astbury; THOMPSON, Scott, Kevin; HOSAHALLI, Subramanya; BEJUGAM, Mallesham; NANDURI, Srinivas; PANIGRAHI, Sunil, Kumar; MAHALINGAM, Natarajan; WO2012/58671; (2012); 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.414910-15-9,tert-Butyl 4-(cyclopropanecarbonyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.,414910-15-9

Preparation of N-cyclopropanoyl piperazinium p-toluenesulfonate (compound A) N-Boc-4-cyclopropanoyl piperazine (20.00 g, 78.64 mmol, 1.0 equiv.) and p-toluenesulfonic acid (p-TSA) monohydrate (15.71 g, 82.60 mmol, 1.05 equiv.) and ethyl acetate (EtOAc) (160 mL, 8 vol.) were added to a 3-necked 250 mL flask equipped with 5 cm stir bar, condenser, thermal couple and N2 inlet. The resulting mixture was heated to 50 C. overnight. The reaction was monitored by TLC. Upon completion, the suspension was cooled to 0 C. in ice bath and stirred for 1 hour. After stirring, the resulting slurry was filtered through Buchner funnel. The obtained wet cake was washed with EtOAc (20.0 mL, 1 vol.) twice (and dried at not more than 60 C. under vacuum overnight to afford compound A as white solid (23.12 g, 70.83 mmol, 90.08% Yield). 1H NMR (400 MHz, CDCl3) ?: 0.75 (m, 2H), 0.94 (m, 2H), 1.61 (m, 1H), 2.35 (s, 3H), 3.23 (br, 4H), 3.86 (br, 4H), 7.19 (d, J=8.2 Hz, 2H), 7.69 (d, J=8.2 Hz, 2H), 9.20 (br, 1H).

The synthetic route of 414910-15-9 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; SCINOPHARM TAIWAN, LTD.; HSIAO, Tsung-Yu; CHANG, Yung-Hung; (16 pag.)US2018/57464; (2018); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

196811-66-2, tert-Butyl 4-carbamothioylpiperazine-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 4-carbamothioylpiperazine-1-carboxylate (synthesized according to Example 5, Step 1, 2 g, 13.75 mmol) in dioxane (20 mL), triethyl amine (1.7 mL, 12.24 mmol) and 1-bromo-3,3,3-trifluoro acetone (3.2 g, 16.5 mmol) were added and stirred at 90 C for 3 h. The completion of the reaction was monitored by TLC. The reaction mixture was quenched with water (10 mL) and extracted with ethyl acetate (2 x 25 mL). The organic layer was separated, dried over anhydrous Na2SO4, concentrated under vacuum and was used as such for next step. Yield: 75% (1 .0 g, white solid). 1 H NMR (300 MHz, DMSO-d6): delta 7.57 (s, 1H), 3.42 (m, 8H), 1.40 (s, 9H). LCMS: (Method A) 338.0 (M+H), Rt. 5.37 min, 99.0% (Max)., 196811-66-2

The synthetic route of 196811-66-2 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ASCENEURON SA; QUATTROPANI, Anna; KULKARNI, Santosh S.; GIRI, Awadut Gajendra; (243 pag.)WO2016/30443; (2016); 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.278788-66-2,(R)-tert-Butyl 3-(hydroxymethyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

Step D: (3R)-tert-butyl4-(2-(2-chloro:-3-cyano-4-fluorophenyl)-2-hydroxyethyl)-3-(hydroxymethyl)piperazine-1-carboxylate; 2-Chloro-6-fluoro-3-( oxiran-2-yl)benzonitrile (9.1 g,46 mmol) and (R)-tert-butyl3-(hydroxymethyl)piperazine-1-carboxylate (14.9 g, 69.1 mmol)were dissolved in ethanol (1 05 mL) and dispensed into 9 sealed tubes then microwaved at140C for 1 h. The combined reaction mixture was concentrated and purified through a 330gISCO Redi-sep column with 50%-100 ethyl acetate/hexane solvent system to yield the title compound., 278788-66-2

278788-66-2 (R)-tert-Butyl 3-(hydroxymethyl)piperazine-1-carboxylate 24820286, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; MERCK SHARP & DOHME CORP.; PASTERNAK, Alexander; BLIZZARD, Timothy; CHOBANIAN, Harry; DE JESUS, Reynalda; DING, Fa-Xiang; DONG, Shuzhi; GUDE, Candido; KIM, Dooseop; TANG, Haifeng; WALSH, Shawn; PIO, Barbara; JIANG, Jinlong; WO2013/28474; (2013); 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.169447-70-5,(S)-tert-Butyl 2-methylpiperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

A mixture of 7-bromo-1-methyl-1H-indazole (500 mg, 2.37 mmol), (S)-tert-butyl-2- methylpiperazine-1-carboxylate (474 mg, 2.37 mmol), t-BuONa (341 mg, 3.55 mmol) BINAP (19 mg, 0.03 mmol), and Pd2(dba)3 (9 mg, 0.01 mmol) in toluene (15 mL) was stirred at 80 C for 16h. The mixture was purified by chromatography (silica, EtOAc/PE = 1/8) to afford (S)-tert-butyl2-methyl-4-( 1-methyl-i H-indazol-7-yl)piperazine- 1 -carboxylate (353 mg, 1.07 mmol, 45%) as product. ESI-MS (Erb, m/z): 331.4 [M+H]t

169447-70-5, As the paragraph descriping shows that 169447-70-5 is playing an increasingly important role.

Reference：
Patent; NAVITOR PHARMACEUTICALS, INC.; O’NEILL, David John; SAIAH, Eddine; KANG, Seong Woo Anthony; BREARLEY, Andrew; BENTLEY, Jonathan; (565 pag.)WO2018/89433; (2018); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics