Tag: M.W:200-300

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.129779-30-2,(3R,5S)-rel-tert-Butyl 3,5-dimethylpiperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

Step 2: To a suspension of 26 (2.00 g, 7.3 mmol) in toluene (28 ml) were added N-Boc cis-2,6-dimethylpiperazine (3.13 g, 14.6 mmol), Pd2(dba)3 (254 mg, 0.28 mmol), tri-tert-butylphosphonium tetrafluoroborate (212 mg, 0.73 mmol) and NaO-tert-Bu (1.05 g, 10.9 mmol). The mixture was refluxed under N2 overnight. After cooling to room temperature, the mixture was partitioned between EtOAc (150 mL) and water (100 mL). The insoluble was removed through filtration and washed with EtOAc. The EtOAc layer was separated and washed with brine, dried over anhydrous Na2SO4. After the removal of organic solvent in vacuo, the residue was purified through Biotage chromatography (EtOAc/hexane= 25/100 to 75/100 gradient) to give the desired product 27 (476 mg, 16%) as a faint yellow solid.

129779-30-2, The synthetic route of 129779-30-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Jiang, Jian-kang; Huang, Xiuli; Shamim, Khalida; Patel, Paresma R.; Lee, Arthur; Wang, Amy Q.; Nguyen, Kimloan; Tawa, Gregory; Cuny, Gregory D.; Yu, Paul B.; Zheng, Wei; Xu, Xin; Sanderson, Philip; Huang, Wenwei; Bioorganic and Medicinal Chemistry Letters; vol. 28; 20; (2018); p. 3356 – 3362;,
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.314741-40-7,(S)-tert-Butyl 3-(hydroxymethyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

5-(bromoacetyl)-2-fluorobenzonitrile (590 mg, 2.44 mmol) and (S)-4-N-BOC-2-hydroxymethyl-piperazine (527 mg,2.44 mmol) were dissolved in THF (40 mL) at 0C then TEA (247 mg, 2.44 mmol) was added. The reaction mixturewas stirred at RT for 16 h, then poured into water and extracted with ethyl acetate. The organic layer was dried overNa2SO4, filtered, and evaporated to dryness. The crude product was purified by MPLC through an 80g Redi-sepcolumn using 0-100% EtOAc/hexane to yield the title compound.

314741-40-7, As the paragraph descriping shows that 314741-40-7 is playing an increasingly important role.

Reference£º
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.1188265-73-7,tert-Butyl 3-(2-hydroxyethyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

To a solution of Intermediate 4 (0.38 g, 2.06 mmol) in DMF (20 mL) were added tert-butyl 3-(2-hydroxyethyl)piperazine-l-carboxylate (1 g, 4.12 mmol) and DIPEA (0.4 g, 3.0 mmol). The reaction mixture was heated at 100C for 5 h, allowed to cool, then stirred at room temperature for 2 days. The reaction mixture was concentrated in vacuo, then partitioned between water and DCM. The organic phase was separated and concentrated in vacuo. The resulting crude material was purified by column chromatography (silica gel: 100-200 mesh, MeOH:DCM gradient 0% to 20%) to give a pale yellow foam. The foam was dissolved in DCM (1 mL) and TFA (2 mL) and stirred for 1 h. The reaction mixture was concentrated in vacuo, then triturated with diethyl ether, to give the title compound (0.6 g) as a sticky yellow solid., 1188265-73-7

As the paragraph descriping shows that 1188265-73-7 is playing an increasingly important role.

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Patent; UCB PHARMA S.A.; KATHOLIEKE UNIVERSITEIT LEUVEN, K.U.LEUVEN R&D; BROOKINGS, Daniel Christopher; FORD, Daniel James; FRANKLIN, Richard Jeremy; GHAWALKAR, Anant Ramrao; KULISA, Claire Louise; NEUSS, Judi Charlotte; REUBERSON, James Thomas; WO2013/68458; (2013); A1;,
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Piperazines – an overview | ScienceDirect Topics

414910-15-9, tert-Butyl 4-(cyclopropanecarbonyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

1 -Tertbutoxycarbonyl-4-(cyclopropanecarbonyl)piperazine (190 mg, 0.75 mmol) was dissolved in dichloromethane, and then trifluoroacetic acid (1 mE) was added. The reaction mixture was stirred at room temperature until complete reaction, and then washed with saturated sodium bicarbonate solution for three times. The organic phases were concentrated to give 112mg (yield 97%) pale yellow solid of N-(cyclopropanecarbonyl) piperazine for use.

414910-15-9, As the paragraph descriping shows that 414910-15-9 is playing an increasingly important role.

Reference£º
Patent; CHENGDU DI’AO PHARMACEUTICAL GROUP CO., LTD.; Ji, Jianxin; Guo, Na; Xue, Ting; Kang, Bingqiang; Ye, Xinfa; Chen, Xin; Zhang, Tao; US2015/51211; (2015); 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.

tert-Butyl (25)-2-methylpiperazine-1-carboxylate ( 43.1 g, 215 mmol) was added to asolution of aldehyde from Preparation 3 (39.0 g, 195 mmol) in dichloromethane (780mL). The reaction mixture was stirred at room temperature for 10 min then sodiumtriacetoxyborohydride (83.1 g, 391 mmol) was added portion-wise. On complete30 addition the reaction mixture was stirred at room temperature for 4 h. The reaction mixture was carefully quenched with water (200 mL) and extracted withdichloromethane (200 mL). The organic layer was dried over sodium sulphate andconcentrated under reduced pressure. Trituration of the crude product with n-pentane afforded the title compound as an off-white solid. (43.0 g, 57.3%)5 1H NMR (300MHz, DM50-d6) o =7.92 (d, 1=2.2 Hz, lH), 7.68 (d, 1=2.2 Hz, lH), 4.09(m, lH), 3.67 (br d, J= 13.1 Hz, lH), 3.52 (s, 2H), 2.88-3.02 (m, lH), 2.69 (br d,J=ll.l Hz, lH), 2.57 (br d, 1=11.3 Hz, lH), 2.35 (s, 3H), 2.15 (dd, 1=11.3, 3.6 Hz, lH),1.98 (td, 1=11.7, 3.4 Hz, lH), 1.39 (s, 9H), 1.13 (d, J=6.7 Hz, 3H). LCM5 Method 1:10m/z 384.66 [M+H+]; RT = 3.47 min

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

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Patent; LEO PHARMA A/S; JESSIMAN, Alan Stuart; JOHNSON, Patrick Stephen; MAANSSON, Kristoffer; S?RENSEN, Morten Dahl; (156 pag.)WO2018/11201; (2018); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

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

A solution of the product of EXAMPLE SE (300 mg, 1.4 mmol), 2-methoxy-4-(4-methylpiperazin- 1 -yl) aniline (338 mg, 1.53 mmol) andtriethylamine (421 mg, 4.17 mmol) in 1,4-dioxane (30 mL) was stirred at 105 C. under nitrogen for 12 hours. The solvent was removed under vacuum and the residue was washed with sodium bicarbonate solution and ethanol. The crude product was recrystallized from 1 ,4-dioxane to give the title compound.10318] ?H NMR (DMSO-d5) oe ppm 12.66 (s, 1H), 11.35 (s, 1H), 8.31 (d, J=9.0 Hz, 1H), 8.25 (s, 1H), 6.68 (d, J=1.2 Hz, 1H), 6.54 (dd, J=1.2, 9.0 Hz, 1H), 3.89 (s, 3H), 3.21-3.10 (m, 4H), 2.50-2.44 (m, 4H), 2.25 (s, 3H)., 122833-04-9

The synthetic route of 122833-04-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ABBVIE INC.; Vasudevan, Anil; Penning, Thomas Dale; Chen, Huanming; Liang, Bo; Wang, Shaohui; Zhao, Zhongqiang; Chai, Dikun; Yang, Leifu; Gao, Yingxiang; Pliushchev, Marina; US2014/171429; (2014); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

76003-29-7, 1-Boc-3-Oxopiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

76003-29-7, To a solution of tert-butyl 3-oxopiperazine- 1 -carboxylate (prepared according to procedure reported in W02005504737, 2.0 g, 9.99 mmol), 1-bromo-4- fluorobenzene (1.748 g, 9.99 mmol), N,N-dimethylethylenediamine (0.070 g, 0.799 mmol) and potassium hydrophosphate (KHPO4) (3.13 g, 17.98 mmol) intoluene (10 ml) was added copper (I)iodide (0.101 g, 0.529 mmol) at 25C. The reaction mixture was heated to 80C for 16 h. Progress of the reaction was monitored by TLC. The reaction mixture was cooled to 25C, diluted with ethyl acetate (25 ml) and filtered through a plug of celite and concentrated to give crude product. The crude product was purified over silica gel (100 – 200 mesh)by column chromatography using 30% ethyl acetate in hexane as eluent to obtain the title compound (0.8 g, 27.2 %)?H NMR (400 MHz, CDC13) 6 7.28-7.24 (m, 2H), 7. 14-7.08 (m, 2H), 4.26 (s, 2H), 3.88-3.71 (m, 4H), 1.51(s, 9H). MS: m/z295(M+1).

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

Reference£º
Patent; LUPIN LIMITED; JANA, Gourhari; KURHADE, Sanjay, Pralhad; JAGDALE, Arun, Rangnath; KUKREJA, Gagan; SINHA, Neelima; PALLE, Venkata, P.; KAMBOJ, Rajender, Kumar; WO2014/9872; (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.129799-08-2,1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate,as a common compound, the synthetic route is as follows.

[0256] Alternatively, the title compound can be prepared via the mono-piperidine compound, shown in the above scheme, beginning with Intermediate C, using two stepwise pairs of (a) amino acid coupling from with l-(tert-butyl) 3-methyl piperazine- 1,3- dicarboxylate, and (b) ester hydrolysis. HATU and DIPEA in DMF were employed at room temperature for 12 hours for the coupling reactions. The hydrolyses were accomplished with LiOH at room temperature for one hour. The combination of coupling and hydrolysis occurred in roughly 60% yield when performed on a gram scale. The steps could be accomplished by someone skilled in the art.

129799-08-2, The synthetic route of 129799-08-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM; LINK, James, T.; LISSANU DERIBE, Yonathan; (91 pag.)WO2019/200217; (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.53788-49-1,tert-Butyl 4-methylpiperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

Example 8Synthesis of [F- 18]- 1 -methyl- l-(4-fluorophenyl)piperazinium saltt-BOC-Protected methylpiperizine was heated in the presence of l-fluoro-4- nitrobenzene under pressure in benzene to give 4-t-BOC-protected 1 -methyl- 1 -(4- nitrophenyl)piperazinium salt. The piperazinium salt was heated in the presence of potassium [18F]fluoride and Krytofx at 2000C for 10 minutes. The oil was treated with aq. 3 M HCl for 20 minutes to give [F-18]- 1 -methyl- l-(4-fluorophenyl)piperazinium chloride., 53788-49-1

The synthetic route of 53788-49-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; THE GENERAL HOSPITAL CORPORATION; WO2008/22319; (2008); A2;,
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

DIPEA (1.79 ml, 10.25 mmol) was added to a solution of 3-bromo-8-chloro-2,4-dimethyl-7-nitro-1,5-naphthyridine (2.95 g, 9.32 mmol) and 1-tert-butyl 3-methyl (3R)-piperazine-1,3-dicarboxylate (2.39 g, 9.79 mmol) in THF (40 ml). The resultant brown solution was heated at 65 C. for 24 h. The reaction mixture was concentrated in vacuo, the residue re-dissolved in ethyl acetate and washed with water (*2) and brine. The aqueous layer was back extracted with ethyl acetate and the combined organics dried (phase separator) and concentrated in vacuo to afford crude material as a brown foam. This was purified by flash silica chromatography (0 to 100% ethyl acetate in heptane) to afford 1-tert-butyl 3-methyl (3R)-4-(7-bromo-6,8-dimethyl-3-nitro-1,5-naphthyridin-4-yl)piperazine-1,3-dicarboxylate (4.13 g, 85%) as a yellow solid; 1H NMR (400 MHz, DMSO, 30 C.) 1.42 (9H, s), 2.74 (3H, s), 2.82 (3H, s), 3.09-3.15 (1H, m), 3.24 (1H, s), 3.55 (1H, d), 3.67 (3H, s), 3.73-3.84 (1H, m), 3.88 (1H, s), 4.37 (1H, d), 5.59 (1H, s), 9.04 (1H, s); m/z: ES+ [M+H]+ 523.9.

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; ASTRAZENECA AB; Kettle, Jason Grant; Bagal, Sharanjeet; Robb, Graeme Richard; Smith, James Michael; Goldberg, Frederick Woolf; Cassar, Doyle Joseph; Feron, James Lyman; US2019/177338; (2019); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics