Tag: M.W:200-300

161357-89-7, 1-(Methylsulfonyl)piperazine hydrochloride is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 15 1 -mesyl-4-(5-methoxycarbonyl-2-pyridyl)piperazine 1-Mesylpiperazine hydrochloride (4.24 g) was added to a solution of methyl 6-chloronicotinate (1.7 g) and N,N-diisopropylethylamine (6.3 ml) in dimethylacetamide (20 ml) and the mixture was heated at 120 C. for 2 hours.. The mixture was allowed to cool to ambient temperature and poured onto crushed ice/water (50 ml) to precipitate a tan solid.. The solid was collected by filtration and dried at 80 C. for 18 hours in a vacuum oven, to give 1-mesyl-4-(5-methoxycarbonyl-2-pyridyl)piperazine (2.05 g), mp 205-207 C. NMR (d6-DMSO): 2.90 (s, 3H), 3.20 (m, 4H), 3.78 (m, 3H), 3.80 (s, 3H), 6.92 (d, 1H), 8.00 (dd, 1H), 8.67 (d, 1H), m/z 300 (M+1)., 161357-89-7

The synthetic route of 161357-89-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; AstraZeneca AB; US6734184; (2004); B1;,
Piperazine – Wikipedia
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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

10222] Step 4. To a suspension of 2-methoxy-4-(4-meth- ylpiperazin- 1 -yl)aniline (Green Chempharm; 3.45 g, 15.57 mmol) and N-(3-(5-methyl-2-(methylsulfinyl)-7-oxopyrido [2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide (Sb) (4.59 g, 12.46 mmol) in anhydrous tert-butanol (40 mE) and dioxane (5 mE) at RT was added DIEA (4.33 mE, 24.92 mmol). The mixture was heated at 1000 C. for 40 h. The reaction mixture was concentrated under reduced pressure (rotary evaporator) to remove the volatiles and the resulting crude residue was suspended in Et20 and filtered. The greenish-brown amorphous solid was washed with Et20 (3×50 mE) and this removed most of the remaining aniline starting material. The crude material was dry-packed on silica gel and purified on a silica gel column (1-20% MeOH in DCM) affording N-(3- (2-((2-methoxy-4-(4-methylpiperazin-1 -yl)phenyl)amino)5-methyl-7-oxopyrido[2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide (5) (2.03 g, 3.86 mmol, 31% yield) as a yellow amorphous solid. m/z (ESI, +ve ion) 526.2 (M+H). ?H NMR (400 MHz, DMSO-d5) oe ppm 10.33 (1H, s), 8.80 (1H, s), 8.09 (1H, s), 7.88 (1H, d, J=8.2 Hz), 7.56 (1H, J=1 .9Hz), 7.50 (1H, t, 1=8.1 Hz), 7.27 (1H, d, J=8.8 Hz), 6.97 (1H, dt, J=6.9, 1.0 Hz), 6.52 (1H, d, J=2.5 Hz), 6.37-6.48 (1H, m), 6.29-6.35 (1H, m), 6.19-6.29 (1H, m), 6.01 (1H, bt s.), 5.71-5.80 (1H, m), 3.78 (3H, s), 3.02 (4H, bt s.), 2.46 (3H, s), 2.43 (4H, t, J=4.9 Hz), 2.22 (3H, s)., 122833-04-9

As the paragraph descriping shows that 122833-04-9 is playing an increasingly important role.

Reference£º
Patent; TASKER, Andrew; WURZ, Ryan; PETTUS, Liping H.; HERBERICH, Bradley J.; US2014/249131; (2014); A1;,
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262368-30-9, N-(4-Aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A solution of methyl (Z)-3-((4-acetamidophenyl)chloromethylene)-2-oxoindoline-5-carboxylate (10 mg, 0.03 mmol), N-(4-aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide (8.1 mg, 0.03 mmol) and TEA (0.01 mL, 0.06 mmol) in EtOH (0.1 mL) was stirred under refluxed for overnight. The reaction solvent was evaporated under reduced pressure, and the residue was purified by column chromatography with dichloromethane/ethanol (50/1, v/v) to obtain the final compound 102 as a yellow solid (14 mg, 88% yield): 1H NMR (400 MHz, DMSO-d6) _ 11.89 (s, 1H), 11.12 (s, 1H), 10.26 (s, 1H), 7.77 (d, J = 8.6 Hz, 2H), 7.58 (dd, J = 8.2, 1.7 Hz, 1H), 7.41 (d, J = 8.6 Hz, 2H), 7.15 (d, J = 8.2 Hz, 2H), 6.93 (d, J = 8.2 Hz, 1H), 6.90 (d, J = 5.0 Hz, 2H), 6.69 (s, 1H), 3.64 (s, 3H), 3.06 (bs, 2H), 2.67 (bs, 2H), 2.18 (bs, 4H), 2.11 (s, 3H), 2.10 (bs, 2H); HRMS (ESI-TOF) m/z calcd for C33H36N6O5 [M + H+] 596.2747 found 597.2818.

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

Reference£º
Patent; BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM; DALBY, Kevin N.; EDUPUGANTI, Ramakrishna; TALIAFERRO, Juliana; LEE, Juhyeon; (0 pag.)WO2018/160967; (2018); A1;,
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31166-44-6, 1-Cbz-Piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

31166-44-6, EXAMPLE 2trans-(5-Carbamoyl-adamantan-2-yl)-amide of 4-{5-[4-(2,2-difluoro-cyclopropylmethyl)-piperazin-1-yl]-pyridin-2-yl}-3,4-dihydro-2H-quinoxaline-1-carboxylic acid (compound No. 4) 2.1: tert-Butyl ester of 4-[5-(4-benzyloxycarbonyl-piperazin-1-yl)-pyridin-2-yl]-3,4-dihydro-2H-quinoxaline-1-carboxylic acid10.12 g of tert-butyl ester of 4-(5-bromo-pyridin-2-yl)-3,4-dihydro-2H-quinoxaline-1-carboxylic acid (intermediate 1.1) and 5.7 g of 4-carboxybenzyl piperazine are mixed in 118 ml of toluene, then 0.95 g of tris(dibenzylideneacetone)dipalladium (0), 1.7 g of 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl and 3.5 g of sodium tert-butylate are added. The reaction mixture is heated at 110¡ã C. for 3 h. Then ethyl acetate is added and the mixture is washed once with water and once with a saturated aqueous solution of sodium chloride. The organic phase is dried over magnesium sulfate and concentrated under reduced pressure. The raw product obtained is chromatographed on silica gel, eluting with a gradient of a mixture of heptane/ethyl acetate (90/10 to 0/100). 10.16 g of tert-butyl ester of 4-[5-(4-benzyloxycarbonyl-piperazin-1-yl)-pyridin-2-yl]-3,4-dihydro-2H-quinoxaline-1-carboxylic acid is obtained.M+H+=530.5

31166-44-6 1-Cbz-Piperazine 643495, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; SANOFI; US2012/135958; (2012); 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.122833-04-9,2-Methoxy-4-(4-methylpiperazin-1-yl)aniline,as a common compound, the synthetic route is as follows.

To a solution of compound 8 (1.33 g, 4.66 mmol) and compound11 (1.03 g, 4.66 mmol) in anhydrous 1-butanol (20 mL), trifluoroacetic acid (0.36 mL, 4.66 mmol) was added. The reaction mixturewas heated to 100 C and stirred for 18 h. Subsequently, it wascooled to room temperature and saturated aqueous sodium bicarbonatesolution was added drop wise until basic pH was obtained.The volatiles were removed in vacuo and the obtained thick slurrywas dissolved in DCM (50 mL). The organic layer was washed withwater (20 mL), brine (20 mL), dried over anhydrous sodium sulfate,filtered and concentrated in vacuo. The crude was purified by flashsilica gel chromatography using DCM/MeOH (96:4, v/v) as eluentto afford 1.42 g of the desired product 12 (3.02 mmol, 65%) as white solid., 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
Article; Basu, Debjit; Richters, Andre; Rauh, Daniel; Bioorganic and Medicinal Chemistry; vol. 23; 12; (2015); p. 2767 – 2780;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.196811-66-2,tert-Butyl 4-carbamothioylpiperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

The production of compound No. 26 proceeds according to the sequence of reaction steps shown in the following schemes: The first sub-step shown above was performed at 20 C. during 2 hours with a molar excess of CH2N2 (about 2 molar equivalents) in dry ether, then in a second sub-step (shown below) performed at 5 C. HCl gas was bubbled into the reaction mixture for 15 minutes, and the desired intermediate was obtained in 71% yield. For the conversion from 3 to 4, the first sub-step shown above was performed at 20 C. during 1 hour with a molar excess of thio-carbonyldiimidazole (about 2 molar equivalents) in THF, then in a second sub-step performed at 20 C. for 12 hours a 25% aqueous NH3 solution was added, and the desired intermediate was obtained in 72% yield. The conversion from 4 to 5 was performed during 6 hours with 1 molar equivalent NaHCO3 at reflux in methanol, and the desired intermediate was obtained in 92% yield. The conversion from 5 to 6 was performed during 3 hours at 20 C., and the desired intermediate was obtained in 90% yield. The conversion from 6 to the final compound was performed during 6 hours at 20 C. in 1,2-dichloroethane (DCE) in the presence of a molar excess of triethylamine (1.2 molar equivalents).

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

Reference£º
Patent; NV reMYND; US2010/197703; (2010); A1;,
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438631-77-7, (R)-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

Representative Synthesis I; (R)-l-(4-Chloro-benzyl)-piperazine-2-carboxylic acid methyl ester; R-4N-Boc-piperazine 2-carboxylic acid methyl ester (679.4mg, 2.78mmol) and 4- chlorobenzaldehyde (390.94mg, 2.78mmol) are mixed in dichloromethane(lthetaml) for 30 minutes. Sodium triacetoxyborohydride (800mg, 3.77mmol) is added. The mixture is stirred at room temperature for 16 hf . Water is added. The aqueous layer is extracted with dichloromethane twice (3OmL x2). The dichloromethane solution is treated with trifluoracetic acid (30ml). After 4 hrs the solvent is evaporated and re-disolved in water. The water solution is basified by adding K2CO3 (solid). The water solution is extracted with EtOAc three times. The organic layer is dried over NaSO4. The product is colorless oil (748mg, 100% ) after removing solvent to dryness. Found reta/z ES+=269 . ‘ . .

438631-77-7, 438631-77-7 (R)-1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate 6558432, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; NOVARTIS AG; NOVARTIS PHARMA GmbH; WO2007/120595; (2007); A2;,
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Piperazines – an overview | ScienceDirect Topics

216144-45-5, 4-(4-Methylpiperazin-1-yl)benzylamine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To 4,9-dioxo-4,9-dihydrothiazolo [5,4-g] quinoline-2-carboxylic acid (27 mg, 0.1 mmol) of N, N-dimethylformamide ( 2.0mL) solution was added DIPEA (27mg, 0.21mmol), HATU (59mg, 0.15mmol), 4- (4-methylpiperazin-1-yl) benzylamine (21mg, 0.1mmol), and the reaction system was stirred at 40 C. 2 hours.The reaction system was diluted with water, extracted with ethyl acetate, and the organic phase was concentrated under reduced pressure andpurifiedby prep-HPLC (NH4HCO3system) to obtain compound 30 (2.25 mg, yield: 5%) as a gray-black solid., 216144-45-5

As the paragraph descriping shows that 216144-45-5 is playing an increasingly important role.

Reference£º
Patent; Shanghai Dinuo Pharmaceutical Technology Co., Ltd.; Zhao Zhiming; (42 pag.)CN110467629; (2019); A;,
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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.

Step 1: (S)-tert-butyl 4-(3,5-difluorophenyl)-2-methylpiperazine-1-carboxylate A solution of (S)-tert-butyl-2-methylpiperazine-1-carboxylate (1.2 g, 6 mmol), 1,3-difluoro-5-iodobenzene (1.685 g, 7.2 mmol), t-BuONa (865 mg, 9 mmol), BINAP (150 mg, 0.24 mmol), Pd2(dba)3 (110 mg, 0.12 mmol) in dry toluene (40 mL) was stirred under N2 at 80 C. for 16 hrs. The reaction mixture was concentrated and the mixture was purified by chromatography (silica, EtOAc/PE=1/10) to afford (S)-tert-butyl-4-(3,5-difluorophenyl)-2-methylpiperazine-1-carboxylate (1.1 g, 3.52 mmol, 59%) as a yellow oil. ESI-MS (EI+, m/z): 257.0 [M-55]+.

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

Reference£º
Patent; Navitor Pharmaceuticals, Inc.; O’Neill, David John; Saiah, Eddine; Kang, Seong Woo Anthony; Brearley, Andrew; Bentley, Jonathan; (136 pag.)US2019/389843; (2019); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

438631-77-7, (R)-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

Method 4:Synthesis of methyl (2R)-l-r5-(3-{l-r6-(2-aminopyrimidin-5-yl)pyridin-3- yl1cvclobutyl}-l,2,4-oxadiazol-5-yl)pyridin-2-yl1piperazine-2-carboxylate (Example 38, Table 1)Ex. 99 R30Example 99 (120 mg, 0.296 mmol) is treated with R30 (361 mg, 1.48 mmol) and NMP (0.150 mL) and heated at 80 C for 48 hours. The resulting mixture is cooled to room temperature and treated with 4N HC1 in 1,4-dioxane (1.50 mL) and stirred for 1.5 hours The resulting mixture is purified by reverse-phase preparative HPLC (C-18 silica, 10- 30% acetonitrile/water/0.1% trifluoroacetic acid over 20 minutes) to afford the title compound as a trifluoroacetic acid salt (110 mg), m/z 514.8 [M+H].

438631-77-7, As the paragraph descriping shows that 438631-77-7 is playing an increasingly important role.

Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; BARTOLOZZI, Alessandra; BOSANAC, Todd; CHEN, Zhidong; DE LOMBAERT, Stephane; DINES, Jonathon, Alan; HUBER, John, D.; LIU, Weimin; LOKE, Pui Leng; MORWICK, Tina, Marie; OLAGUE, Alan; RIETHER, Doris; TYE, Heather; WU, Lifen; ZINDELL, Renee, M.; WO2012/40139; (2012); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics