Tag: M.W:200-300

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.

694499-26-8, General procedure: To a solution of 3-iodo-4-methylbenzoyl chloride obtained above in dry DCM (10mL) at 0C was added Et3N (0.28mL, 2.0mmol) and 4-((4-methylpiperazin-1-yl) methyl)-3-(trifluoromethyl) aniline (328mg, 1.2mmol). The mixture was stirred at room temperature for 5h, and then the solvent was removed under reduced pressure. The residue was purified by using column chromatography to afford the corresponding product 6-1 (439mg, 2 steps yield: 85%).

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

Reference：
Article; Liu, Yang; Peng, Xia; Guan, Xiaocong; Lu, Dong; Xi, Yong; Jin, Shiyu; Chen, Hui; Zeng, Limin; Ai, Jing; Geng, Meiyu; Hu, Youhong; European Journal of Medicinal Chemistry; vol. 126; (2017); p. 122 – 132;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

57260-70-5, tert-Butyl 4-benzylpiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step 2: 1-Benzylpiperazine hydrochloride (0757) [00269] To a solution of compound A3-2 (16.8 g, 60.8 mmol, l .O eq) in Dioxane-HCI (100 mL) was stirred at 20 C for 2 hours. The reaction mixture was concentrated under reduced pressure to obtain the title compound (12.5 g, 97% yield) as a white solid., 57260-70-5

As the paragraph descriping shows that 57260-70-5 is playing an increasingly important role.

Reference：
Patent; VIVACE THERAPEUTICS, INC.; LIN, Tracy Tzu-Ling Tang; KONRADI, Andrei W.; VACCA, Joseph; SHEN, Wang; COBURN, Craig; (231 pag.)WO2017/58716; (2017); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

630125-91-6, 4-((4-Ethylpiperazin-1-yl)methyl)-3-(trifluoromethyl)aniline is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,630125-91-6

Into a solution of 4-(4-Ethyl-piperazin-1-ylmethyl)-3-trifluoromethyl- phenylamine (3.0 g, 1.04 mmol, 1.0 eq. ) in dichloromethane (5.2 ml) was added diisopropylethyl amine,(2.00 ml, 1.14 mmol, 1.1 eq.). The solution was cooled to 0 C, after which 4-Methyl-3-nitrobenzoylchloride (2.13 g, 1.07 mmol, 1.03 eq. ) was added in portions into the reaction mixture which was further equilibrated for 30 minutes. The reaction mixture was then partitioned between dichloromethane and saturated sodium carbonate solution. The organic layer was separated and the aqueous layer was extracted with dichloromethane. The combined organic extracts were washed with water, brine, dried over Na2S04, filtered and concentrated to afford the desired product (4.58 g, 98%). The desired compound was used in the next step without further purification.

The synthetic route of 630125-91-6 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; IRM LLC; WO2005/123719; (2005); 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.76003-29-7,1-Boc-3-Oxopiperazine,as a common compound, the synthetic route is as follows.

76003-29-7, To a solution of the product of Step 7 (10.0 g, 50.0 mmol) in anhydrous DMF(250 ml) in an ice-water bath were added sodium hydride (2.40 g, 60.0 mmol) andbenzyl chloride (6.60 g, 52.5 mmol). The mixture was stirred at RT for 4.5 h. Thereaction was quenched with water (10 ml), diluted with CH2CI2 (500 ml), and washedwith water (2x250ml). The organic layer was extracted with saturated NH4CI (200 ml),dried (MgSO4), concentrated, and purified by column chromatography (gradientMeOH/CH2CI2 0-5%) to give the product (10.7 g, 74%). 1H-NMR (CDCI3): 6=7.2-7.3(m, 5H), 4.57 (s, 2H), 4.10 (s, 2H), 3.53 (m, 2H), 3.19 (m, 2H), 1.41 (s, 9H).

As the paragraph descriping shows that 76003-29-7 is playing an increasingly important role.

Reference：
Patent; SCHERING CORPORATION; WO2006/14944; (2006); 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.5747-48-8,11-(Piperazin-1-yl)dibenzo[b,f][1,4]thiazepine,as a common compound, the synthetic route is as follows.

Example 1: l-(4-Dibenzo[b,f| [l,4]thiazepin-ll-yl-piperazin-l-yl)-2-methyl-propan-l-oneAn ice-bath-cooled solution of 1 l-iperazin-l-yldibenzo[b,f][l,4]thiazepine (“PDBTZ”, 1 mmol) and triethylamine (1.1 mmol) in dichloromethane (5 mL) is treated with 2-methylpropionic acid chloride (1.1 mmol). The mixture is warmed to ambient temperature and stirred for one hour. Water is added and the mixture is extracted with dichloromethane. The organic portion is washed (brine), dried (sodium sulfate), and evaporated. The crude material is purified by flash chromatography to provide the title compound., 5747-48-8

Big data shows that 5747-48-8 is playing an increasingly important role.

Reference：
Patent; ASTRAZENECA AB; WO2008/79838; (2008); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

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

To a mixture of 1-tert-butyl 2-methyl piperazine- 1,2-dicarboxylate (5.0 g, 22.6 mmol, 1.00 eq) in MeOH (50.0 mL) was added HCl/dioxane (4.0 M, 134 mL). The reaction mixture was degassed and purged with nitrogen 3 times, and the mixture was stirred at 25 C for 12 hours under a nitrogen atmosphere. The reaction mixture was concentrated under reduced pressure to dryness to give methyl piperazine- 2-carboxylate (4.89 g, 2HC1, crude) as a white solid, which was used directly in the next step without further purification.

129799-15-1, 129799-15-1 Methyl 1-Boc-piperazine-2-carboxylate 2756818, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; MIRATI THERAPEUTICS, INC.; ARRAY BIOPHARMA, INC.; FISCHER, John, P.; FELL, Jay, Bradford; BLAKE, James, F.; HINKLIN, Ronald, Jay; MEJIA, Macedonio, J.; HICKEN, Erik, James; CHICARELLI, Mark, Joseph; GAUDINO, John, J.; VIGERS, Guy, P.A.; BURGESS, Laurence, E.; MARX, Matthew, Arnold; CHRISTENSEN, James, Gail; LEE, Matthew, Randolf; SAVECHENKOV, Pavel; ZECCA, Henry, J.; (529 pag.)WO2017/201161; (2017); 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, 1.3g, 5.3 mmol) in dioxane (10 mL), TEA(1 mL, 7 mmol) and 1-bromo-3,3-dimethylbutan-2-one (0.94 mL, 6.8 mmol) were added at rt and stirred for 16 h at 90 C. The completion of the reaction was monitored by TLC. Thereaction mixture was quenched with water and extracted with EtOAc. The organic layer was dried over anhydrous Na2504, concentrated under vacuum and the resulting crude product was taken as such for next step without further purification. Yield: 88% (1.5 g, black liquid). LCMS: (Method A) 326.2 (M+H), Rt. 3.75 mm, 60.4% (Max)., 196811-66-2

196811-66-2 tert-Butyl 4-carbamothioylpiperazine-1-carboxylate 12093220, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; ASCENEURON S. A.; QUATTROPANI, Anna; KULKARNI, Santosh, S.; GIRI, Awadut Gajendra; TORONTO, Dawn, V.; CROWE, David, Malcolm; (150 pag.)WO2017/144637; (2017); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

55121-99-8, (4-Aminophenyl)(4-methylpiperazin-1-yl)methanone is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,55121-99-8

Example 164 N-[4-(4-Methylpiperazin-1-ylcarbonyl)phenyl]-(2-chloro-5-nitrophenyl)carboxamide The title compound (0.54 g, yield 89%) was obtained according to the procedure described in Example 2 using 4-(4-methylpiperazin-1-ylcarbonyl)aniline (0.33 g, 1.50 mmol), DMA (5 ml) and 2-chloro-5-nitrobenzoyl chloride (0.40 g, 1.80 mmol). 1H-NMR (400 MHz, DMSO-d6, TMS): delta(ppm) 2.32 (4H, m), 3.34-3.59 (4H, m), 7.42 (2H, d, J=8.6 Hz), 7.77 (2H, d, J=8.6 Hz), 7.91 (1H, d, J=8.8 Hz), 8.35 (1H, dd, J=2.7, 8.8 Hz), 8.49 (1H, d, J=2.7 Hz), 10.89 (1H, s); MS(FAB) m/z: 403 (M+H)+.

The synthetic route of 55121-99-8 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; SANKYO COMPANY, LIMITED; US2003/134859; (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.,694499-26-8

Methyl 3-azido-4-methylbenzoate (9.6 g, 0.5 mol) and 4-((4-methylpiperazine-1-substituted) methyl) -3- (Trifluoromethyl) aniline (13.7 g, 0.5 mol) was dissolved in re-distilled tetrahydrofuran (50.0 mL), and a solution of potassium tert-butoxide (16.8 g, 0.15 mol) in re-distilled tetrahydrofuran (50.0 mL) was slowly dropped. After 1 hour of reaction, the temperature was naturally raised to room temperature and the reaction was continued for 8 hours. After the reaction was completed, the solvent was spin-dried, extracted with EtOAc and water, and the organic phase was washed with saturated brine,Anhydrous Na2SO4 was dried, and the red solid obtained by silica gel column chromatography was the target product (13.5 g, yield: 61%).

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

Reference：
Patent; Chinese Academy Of Sciences Guangzhou Bio-pharmaceutical And Health Institute; Ding Ke; Li Yupeng; Shen Mengjie; Long Huoyou; Zhang Zhang; Leng Fang; Lu Xiaoyun; (51 pag.)CN103539784; (2016); B;,
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.170911-92-9,tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

A stirred mixture of 8-((6-chloro- lH-pyrazolo[3,4-d]pyrimidin-l- yl)sulfonyl)quinoline (0.3 g, 0.00086 mol, 1.0 eq), tert-butyl 4-(4- aminophenyl)piperazine- l-carboxylate (0.95eq), DIPEA (3.0 eq) in w-BuOH (10 mL) in a sealed vial was heated at 110C for 16 h. After TLC showed completion of the starting material, the mixture was cooled to rt, poured into water and extracted with ethyl acetate (2 x 100 mL). The organic layer was dried over Na2S04 and the solvent distilled off to get the crude product. The crude product was purified through Combiflash chromatography (silica gel) using MeOH in DCM as eluent. The desired compound was eluted at 0.8% MeOH in DCM and the concentration of the pure fractions provided tert- butyl 4-(4-((l-(quinolin-8-ylsulfonyl)- lH-pyrazolo[3,4-170911-92-9

170911-92-9 tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate 11011301, apiperazines compound, is more and more widely used in various fields.

Reference：
Patent; ASANA BIOSCIENCES, LLC; VENKATESAN, Aranapakam M.; SMITH, Roger A.; THOMPSON, Scott K.; LAPING, Nicholas; KULKARNI, Bheemashankar; HALLUR, Gurulingappa; VISWANADHAN, Vellarkad N.; PENDYALA, Muralidhar; KETHIRI, Raghava Reddy; TYAGI, Rajiv; SIVANANDHAN, Dhanalakshmi; BAKTHAVATCHALAM, Rajagopal; WO2015/38417; (2015); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics