Tag: M.W:100-200

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.,75336-86-6

EXAMPLE 16; Example 16A. 1.1.1 -trifluoro-2-f4-( ((2R)-2-methyl-4-r2-f trifluoromethvDphenyl’lpiperazin- 1 – yl 1 sulfonvOphenyl’lpropan-sigma-ol; Step 16A; A mixture of (R)-2-methyl-piperazine (300 mg, 2.99 mmol), 2-bromo benzotrifluoride (612 mg, 2.72 mmol), tris(dibenzylidineacetone)dipalldium (0) (24.72 mg, 0.027 mmol), rac-2,2′-bis(diphenylphosphino)-l,l’-binaphtyl (51.06 mg, 0.082 mmol) and sodium tert- butoxide (326.77 mg, 3.4 mmol) were charged to a microwave vial. Toluene (3.0 mL) was introduced under nitrogen atmosphere and the reaction mixture was irradiated at 1 1O0C for 30 minutes. Reaction was complete as determined by TLC. The reaction was repeated at (R)-2- methyl-piperazine (1.0 g, 9.98 mmol). Reaction mixtures were combined, diluted with dichloromethane, washed with water, saturated brine then dried over Na2SO4 and concentrated. The crude product was purified via flash column chromatography to yield (R)-3-methyI-l -(2- trifluoromethyl-phenyO-piperazine as yellow oil (1.23 g, 39.6percent yield). IH NMR (400 MHz, CHLOROFORM-D) delta ppm 1.07 (d, J=6.32 Hz, 3 H) 2.41 – 2.51 (m, 1 H) 2.74 – 2.84 (m, 1 H) 2.90 – 2.98 (m, 2 H) 3.00 – 3.13 (m, 3 H) 7.18 – 7.25 (m, 1 H) 7.35 (d, J=8.08 Hz, 1 H) 7.47 – 7.55 (m, 1 H) 7.62 (d, J=7.83 Hz, 1 H).

As the paragraph descriping shows that 75336-86-6 is playing an increasingly important role.

Reference：
Patent; WYETH; WO2007/92435; (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.4318-42-7,1-Isopropylpiperazine,as a common compound, the synthetic route is as follows.

To a solution of 2-chloro-5-nitropyridine (2.5g, 15.7mmol) in THF (25mL), are added1 -isopropylpiperazine (2.01g, 15.7mmol) and K2CO3 (3.25g, 23.6mmol). The reaction mixture is stirred at 5O0C for 4 hours and then at 7O0C overnight. The solvent is removed in vacuo and the resultant orange solid is triturated using 10:1 petroleum ether-diethyl ether. The isolated compound (3.7g, 94percent) is used in the next step without further purification.

4318-42-7, As the paragraph descriping shows that 4318-42-7 is playing an increasingly important role.

Reference：
Patent; GALAPAGOS N.V.; WO2007/138072; (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.5625-67-2,Piperazin-2-one,as a common compound, the synthetic route is as follows.

5625-67-2, Di-tert-butyl dicarbonate (3.92 g, 17.98 mmol) was added to a suspension of 2-piperazinone (1.50 g, 14.98 mmol) in dichloromethane (15 mL). The mixture was stirred at room temperature for 5 hours. The solvent was evaporated to afford 1 ,1- dimethylethyl 3-oxo-1-piperazinecarboxylate (2.99 g, quantitative) as an off-white solid.

As the paragraph descriping shows that 5625-67-2 is playing an increasingly important role.

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

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.

General procedure: To a solution of triphenylphosphine (0.37 mmol) in THF (30 mL) was slowly added diisopropyl azodicarboxylate (0.37 mmol) in 15 min at 0 C and the mixture was stirred for another 15 min. At the same temperature, to the resulting mixture was slowly added a solution of 20 (0.185 mmol) and corresponding alcohol (0.37 mmol) dissolved in 20 mL THF. The ice bar was removed and the reaction mixture was stirred at room temperature for 12 h. The reaction mixture was evaporated in vacuo, and the residue was purified by column chromatography to afford the product., 5317-33-9

5317-33-9 3-(4-Methylpiperazin-1-yl)propan-1-ol 79208, apiperazines compound, is more and more widely used in various fields.

Reference：
Article; Xing, Weiqiang; Ai, Jing; Jin, Shiyu; Shi, Zhangxing; Peng, Xia; Wang, Lang; Ji, Yinchun; Lu, Dong; Liu, Yang; Geng, Meiyu; Hu, Youhong; European Journal of Medicinal Chemistry; vol. 95; (2015); p. 302 – 312;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

115761-79-0, 1-(2,4-Difluorophenyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: Additional amide analogs were prepared by adding 1.5 equivalents of an amine which will provide the desired substituents into a 1 dram vial (1.5 eq.) along with lithium 5-amino-7- methoxyimidazo[1,2-c]quinazoline-2-carboxylate (30 mg, 0.114 mmol) and a DMF solution (1.0 ml) solution of DIPEA (0.079 ml, 0.454 mmol), shaking the vial for 5 minutes in a Bohdan Miniblock Shaker and then adding 1-propanephosphonic acid cyclic anhydride (50% w/w in EtOAc, 64.7 mul, 0.109 mmol), and continuing to shake the vial at RT overnight. The completed reaction was quenched with 1.0 ml water and the organic layer separated by filtering through a Varian 2 ml Reservior Frit and a Whatman 0.45mum syringe filter to remove emulsion, followed by solvent removal using a Genevac. The crude residue was dissolved in 1.0 ml DMSO and purified by LC/MS.

115761-79-0, The synthetic route of 115761-79-0 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; MERCK SHARP & DOHME CORP.; ALI, Amjad; LIM, Yeon-Hee; GALLO-ETIENNE, Gioconda, V.; KELLY, Joseph, Michael; BERLIN, Michael; TING, Pauline; TAGAT, Jayaram, R.; XIAO, Dong; KUANG, Rongze; WU, Heping; WANG, Hongwu; (157 pag.)WO2019/118313; (2019); 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.

A mixture of N [5-chloro-7- (3-isopropoxyprop-1-yn-1-yl)-1, 3-benzodioxol-4-yl]-7- (3- chloropropoxy) -6-methoxyquinazolin-4-amine (0.22g, 0. 43mmol), triethylamine (0. 29ml, 2.13mmol), 1-methylpiperazin-2-one (0.24g, 2. 13mmol) in 2-methoxyethanol (3ml) was heated to 80 C for 12 hours and then at 100 C for 7 hours. The solvent was removed under reduced pressure and the residue was partitioned between dichloromethane and water. The organic layer was separated, dried over magnesium sulfate and evaporated under reduced pressure. The residue was purified by flash chromatography on silica eluting with a mixture of 2-8 percent methanol in dichloromethane to give the product as an light orange solid (0.129g, 51percent). NMR Spectrum: (DMSOd6) 1. 18 (d, 6H), 1.98 (m, 2H), 2.52 (t, 2H under DMSO), 2.72 (t, 2H), 2.88 (s, 3H), 3.04 (s, 2H), 3.34 (t, 2H under H20), 3.83 (m, 1H), 3.97 (s, 3H), 4.22 (t, 2H), 4.42 (s, 2H), 6.17 (s, 2H), 7.15 (s, 1H), 7.21 (s, 1H), 7.83 (s, 1H), 8.34 (s, 1H), 9.52 (s, 1H). Mass Spectrum: M+H+ 596 and M+ll 594

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

Reference：
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2004/4732; (2004); 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.59878-57-8,1-(Cyclopropylcarbonyl)piperazine,as a common compound, the synthetic route is as follows.

59878-57-8, 0.62g to 1.0g of Intermediate VI and cyclopropylmethyl – piperazin-1-yl – methyl ketone was added to a 100mL one-neck flask was added10mLDMF clear solution was stirred, then add 2.05gHBTU, 0.82g triethylamine, room temperature for 5h. After completion of the reaction the reactionIt was poured into water, extracted with ethyl acetate, dried over anhydrous sodium sulfate spin column chromatography to give 1.1g solid.

59878-57-8 1-(Cyclopropylcarbonyl)piperazine 2064235, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; Warwick Nanjing Pharmaceutical Technology Co., Ltd.; Zhang, Xiaoqing; Song, Zhinchun; Bao, Jinyuan; Jiang, Yuwei; (25 pag.)CN105254628; (2016); A;,
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.21655-48-1,cis-2,6-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

Adding 2, 6-lupetazin (11.4g, 100mmol, 1eq) and di-tert-butyl dicarbonate (21.8g, 100mmol, 1eq) into a 250mlflask; and then adding 100ml tetrahydrofuran, reacting under room temperature for 4 hours; and condensing up tetrahydrofuran(i.e., condensing tetrahydrofuran until used up), 21.4g orange-colored oily substance ZTH-1 is obtained, whereinthe yield is 100%., 21655-48-1

As the paragraph descriping shows that 21655-48-1 is playing an increasingly important role.

Reference：
Patent; Suzhou Maidixian Pharmaceutical Inc.; Zhang, Nan; Zhong, Rong; ZHANG, Nan; ZHONG, Rong; EP2589601; (2013); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

21655-48-1, cis-2,6-Dimethylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

In a sealed tube, 2-(2,8-dimethylimidazo[l,2-b]pyridazin-6-yl)-7-fluoro-pyrido[l,2- a]pyrimidin-4-one (Intermediate 2; 50 mg, 0.162 mmol), and cis-2,6-dimethylpiperazine (74 mg, 0.647 mmol, 4.0 eq.) were stirred in DMSO (1.5 mL) at 110C overnight. The solvent was removed under high vacuum. The residue was taken up in CH2CI2and washed with an aqueous saturated solution of NaHC03. The organic layer was separated and dried over Na2S04and concentrated in vacuo. The crude was purified by column chromatography (S1O2,CH2Cl2/MeOH=95/5 to 90/10) to afford the title product (32 mg, 49%) as a light yellow solid. MS m/z 404.4 [M+H+]., 21655-48-1

As the paragraph descriping shows that 21655-48-1 is playing an increasingly important role.

Reference：
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; MCCARTHY, Kathleen Dorothy; METZGER, Friedrich; RATNI, Hasane; (76 pag.)WO2017/81111; (2017); 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.1152367-80-0,(S)-1,3-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

Intermediate 11CSV 2,4-dimethylpiperazi – 1 -carbonyl chlorideTo a solution of triphosgene (1.04 g, 3.5 mmol) in DCM (20 mL) under nitrogen was added pyridine (2.3 g, 28.0 mmol) drop-wise at 0C followed by addition of (S)-l,3- dimethylpiperazine (800 mg, 7.0 mmol) in DCM (30 mL), the reaction mixture was warmed to RT and stirred overnight as monitored by TLC (Rf= 0.9, PE: EtOAc = 1 : 1). The mixture was concentrated to give Intermediate 1 1 (3 g, crude) which was used without purification.

1152367-80-0, As the paragraph descriping shows that 1152367-80-0 is playing an increasingly important role.

Reference：
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; LI, David, Yunzhi; WANG, Jiabing; YANG, Zhenfan; ZENG, Qingbei; ZHANG, Xiaolin; WO2014/135876; (2014); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics