Tag: M.W:100-200

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.

To a solution of czs-2,6-dimethylpiperazine (1.00 g, 8.70 mmol) in CHC13 (20 mL) was added Boc anhydride (1.90 g, 8.70 mmol) drop-wise at 0 C, and the reaction mixture was stirred at room temperature for 16 h. The reaction mixture was diluted with DCM (30 mL) and washed with H20 (30 mL). The organic layer was separated, washed with brine (10 mL), dried over anhydrous Na2S04 and concentrated in vacuo to afford tert-butyl cz5-3,5-dimethylpiperazine-l- carboxylate (1.82 g crude) as an off-white solid. This compound was used as such for the next reaction without further purification. LC/MS (ESI) m/e [M+H]+/RT (min)/%: (0321) 215.00/2.52/83.4%. 1H NMR (400 MHz, DMSO-d6) delta 1.05 (d, J = 6.1 Hz, 6H), 1.20 (d, J = 6.7 Hz, 1H), 1.46 (s, 9H), 2.32-2.40 (m, 2H), 2.72-2.82 (m, 2H), 3.80-4.02 (m, 2H)., 21655-48-1

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

Reference£º
Patent; NEUROPORE THERAPIES, INC.; WRASIDLO, Wolfgang; STOCKING, Emily, M.; HALL, Adrian; MACCOSS, Malcolm; (139 pag.)WO2017/20010; (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.109-01-3,1-Methylpiperazine,as a common compound, the synthetic route is as follows.

A mixture of 3-bromopropanol (20 ml), N-methylpiperazine (29 ml), potassium carbonate (83 g) and ethanol (200 ml) was stirred and heated to reflux for 20 hours. The mixture was cooled to ambient temperature and filtered. The filtrate was evaporated and the residue was triturated under diethyl ether. The resultant mixture was filtered and the filtrate was evaporated. The residue was purified by distillation at about 60-70C under about 0.2 mm Hg to give 1- (3-hydroxypropyl)-4-methylpiperazine (17 g); NMR Spectrum: (CDC13) 1.72 (m, 2H), 2.3 (s, 3H), 2.2-2. 8 (m, 8H), 2.6 (t, 2H), 3.8 (t, 2H), 5.3 (br s, 1H)., 109-01-3

As the paragraph descriping shows that 109-01-3 is playing an increasingly important role.

Reference£º
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2004/4732; (2004); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

13889-98-0, 1-Acetylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure P. l-[4-(4-Nitro-phenyl)-piperazin-l-yl]-ethanoneA focus microwave vessel was charged with 4-fluoronitrobenzene (leqv, 1.41 g, 10 mmol), acetylpiperazine (leqv, 1.28 g, 10 mmol), DIPEA (leqv, 1.7 ml, 10 mmol) and propan-2-ol (2 ml). The reaction mixture was irradiated (100W) at 9O0C for 25 mins. A yellow precipitate formed on cooling, which was collected by filtration, washed with propan-2-ol (20 ml) and dried under vacuum to give the product (1.401 g, 56%, 5.6 mmol) as a yellow solid. LC/MS: 100% MH+, m/z 250, Rt = 1.23 mins.

13889-98-0, 13889-98-0 1-Acetylpiperazine 83795, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; EVOTEC AG; WO2008/122787; (2008); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

74879-18-8, (S)-(+)-2-Methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

74879-18-8, To a stirred solution of (2S)-2-methylpiperazine (0.30 g, 2.1 mmol) in DMA (6 mL), 6-chloropyridine-3-carbonitrile (0.29 g, 2.3 mmol) and K2C03 were added. The resultantreaction mixture was heated to 60 C for 2 h (TLC indicated complete consumption ofstarting material). The reaction mixture was diluted with cold water (20 mL) and extractedwith EtOAc (3 x 25 mL). The combined organic extracts were washed with cold water (20mL) and brine (2 x 20 mL). The organic layer was separated, dried over Na2S04 andconcentrated under reduced pressure to give the crude residue which was purified by columnchromatography (100-200 silica gel, 10 g, 10% MeOH-DCM) to furnish 6-[(3S)-3-methylpiperazin-1-yl]pyridine-3-carbonitrile (0.29 g, 67%) as an off-white solid.LCMS: m/z: 203.4 [M+Ht.

As the paragraph descriping shows that 74879-18-8 is playing an increasingly important role.

Reference£º
Patent; MITOBRIDGE, INC.; TAKAHASHI, Taisuke; KLUGE, Arthur; LAGU, Bharat; JI, Nan; (162 pag.)WO2018/125961; (2018); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

1152367-80-0, (S)-1,3-Dimethylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To 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 0 C. followed by addition of (S)-1,3-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 11 (3 g, crude) which was used without purification.

1152367-80-0, The synthetic route of 1152367-80-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ASTRAZENECA AB; LI, David Yunzhi; WANG, Jiabing; YANG, Zhenfan; ZENG, Qingbei; ZHANG, Xiaolin; US2014/255428; (2014); 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.109-07-9,2-Methylpiperazine,as a common compound, the synthetic route is as follows.

Example 5 A reaction was carried out as described for Example 1, except that the solvent was changed from 44.7 g of 1-butanol to a mixed solvent consisting of 5.3 g of water and 40 g of 1-butanol (water content 10.6 wt%). After stirring at 0 to 5C for 2 hours, the reaction solution was analyzed. As a result, the reaction yield of 1-benzyloxycarbonyl-3-methylpiperazine was 82.1% (based on the amount of 2-methylpiperazine). Comparative Example 1 A reaction was carried out as described for Example 1, except that the solvent was changed from 44 g of 1-butanol to a mixed solvent consisting of 9 g of water and 35 g of 1-butanol (water content 20.5 wt%). After stirring at 0 to 5C for 2 hours, the reaction solution was analyzed. As a result, the reaction yield of 1-benzyloxycarbonyl-3-methylpiperazine was 59.6% (based on the amount of 2-methylpiperazine). Comparative Example 2 A reaction was carried out as described for Example 4, except that the solvent was changed from 44 g of 1-butanol to a mixed solvent consisting of 18 g of water and 27 g of 1-butanol (water content 40.0 wt%). After stirring at 0C for 2 hours, the reaction solution was analyzed. As a result, the reaction yield of 1-benzyloxycarbonyl-3-methylpiperazine was 51.6% (based on the amount of 2-methylpiperazine). Comparative Example 3 A reaction was carried out as described for Example 1, except that the solvent was changed from 44 g of 1-butanol to a mixed solvent consisting of 22 g of water and 22 g of 1-butanol (water content 50 wt%). After stirring at 0C for 2 hours, the reaction solution was analyzed. As a result, the reaction yield of 1-benzyloxycarbonyl-3-methylpiperazine was 33.6% (based on the amount of 2-methylpiperazine)., 109-07-9

The synthetic route of 109-07-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Toray Fine Chemicals Co., Ltd.; EP1548010; (2005); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

103-76-4, N-(2-Hydroxyethyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,103-76-4

Step: 3A-lSynthesis of 2-[4-(4-Nitro-phenyI)-piperazin-l-yl]-ethanol. Procedure:K2C03 (3.912g, 0.02834mol) followed by 1 -Fluoro-4-nitro-benzene (2g, 0.01417mol) was added to a solution of 2-Piperazin-l-yl-ethanol (5.21ml, 0.0425 lmol) in DMF (10ml) and the reaction flask was maintained at 80C for 5hrs. The reaction was monitored by the TLC (10% MeOH: CHC13). The resultant was quenched with ice to afford 3g (86% yield) of 2-[4-(4-Nitro-phenyl)-piperazin-l-yl]-ethanol as a yellow solid.

The synthetic route of 103-76-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; AURIGENE DISCOVERY TECHNOLOGIES LIMITED; SENGUPTA, Saumitra; RAJAGOPALAN, Srinivasan; BELAVAGI, Ningaraddi; RAMACHANDRA, Muralidhara; WO2012/59932; (2012); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

4318-42-7, 1-Isopropylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step A: r5-(4-lsopropyl-piperazin-1 -yl)-2-(4-methylsulfanyl-phenoxy)- benzyli-methyl-carbamic acid tert-butyl ester.; A mixture of [5-bromo-2-(4- methylsulfanyl-phenoxy)-benzyl]-methyl-carbamic acid tert-butyl ester (300 mg, 0.684 mmol) {prepared in an analogous fashion to Example 1 , Steps A-C}, isopropyl piperazine (132 mg, 1.02 mmol), XPHOS (39 mg, 0.082 mmol), Pd2(dba)3 (62.6 mg, 0.0684 mmol), and t-BuONa (98.0 mg, 1.02 mmol) in toluene was heated in a sealed tube overnight at 120 0C. After cooling to rt, the mixture was filtered through diatomaceous earth and the filtrate was concentrated. Purification by FCC gave the desired product (180 mg, 54percent). MS (ESI): mass calcd. for C27H39N3O3S, 485.27; m/z found, 486.4 [M+H]+. 1H NMR (CDCI3): 7.22 (d, J = 8.5, 2H), 6.86-6.83 (m, 1 H), 6.83-6.80 (m, 4H), 4.42- 4.35 (m, 2H), 3.19-3.16 (m, 4H), 2.87-2.83 (m, 2H), 2.80-2.75 (m, 1 H), 2.75- 2.71 (m, 1 H), 2.71-2.67 (m, 4H), 2.44 (s, 3H), 1.48-1.40 (m, 9H), 1.10 (d, J = 6.5, 6H).

4318-42-7, 4318-42-7 1-Isopropylpiperazine 78013, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; JANSSEN PHARMACEUTICA N.V.; WO2008/2820; (2008); 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.59878-57-8,1-(Cyclopropylcarbonyl)piperazine,as a common compound, the synthetic route is as follows.

59878-57-8, To a stirred suspension of 4-(bromomethyl)-6-(trifluoromethyl)pyridin-2-amine hydrobromide (2.10 g, 6.25 mmol) in acetonitrile (13 mL) was added potassium carbonate and cyclopropyl(piperazin-1-yl)methanone (1.06 g, 6.88 mmol). The mixture was stirred atr.t. for 14 h. Water was added and the mixture was extracted with ethyl acetate. The organic phase waswashed with half-saturated sodium chloride solution, dried (sodium sulfate) and the solvent was removed in vacuum. Ssilicage chromatography gave 2.00 g (98 % yield) of the title compound.LC-MS (Method 2): R = 0.94 mm; MS (ESipos): m/z = 329 [M+H]

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

Reference£º
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; SCHULZE, Volker; HEINRICH, Tobias; PRINZ, Florian; LEFRANC, Julien; SCHROeDER, Jens; MENGEL, Anne; BONE, Wilhelm; BALINT, Joszef; WENGNER, Antje; EIS, Knut; IRLBACHER, Horst; KOPPITZ, Marcus; BOeMER, Ulf; BADER, Benjamin; BRIEM, Hans; LIENAU, Philip; CHRIST, Clara; STOeCKIGT, Detlef; HILLIG, Roman; (1256 pag.)WO2017/102091; (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.103-76-4,N-(2-Hydroxyethyl)piperazine,as a common compound, the synthetic route is as follows.

2-(4-Methylpiperazin-l-yl)ethyl 4-nitrophenyl carbonate To a stirred solution of l-(2-hydroxyethyl)piperazine (26.0 g, 0.2 mol) in DMF (200 mL) was added formic acid (752 mL, 0.2 mol) and formaldehyde (16.2 g, 0.2 mol, 37percent solution in water) The reaction mixture was cautiously heated at 100 0C for 2 hours and then stirred overnight at room temperature. The solvent was removed in vacuo. This procedure was repeated 3 further times to give -100 g of product. The crude products were combined and distilled under vacuum to give, at ~74 0C, 2-(4-methylpiperazin-l-yl)ethanol (51 g, 44percent) as a colourless liquid. Analytical LCMS: (System B, Rtau = 0.70 min), ES+: 145.1 (100percent) [MH]+., 103-76-4

As the paragraph descriping shows that 103-76-4 is playing an increasingly important role.

Reference£º
Patent; BIOVITRUM AB (publ); WO2009/71677; (2009); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics