Heterocyclic Building Blocks-piperazine

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

To 48 (26 mg, 0.1 mmol) in DMF (1 mL) was added 2,4- difluorophenylpiperazine (20 mg, 0.1 mmol). The reaction mixture was stirred for 1.5 hours. To the crude mixture was added 2-thiopheneethylamine (14 pL, 0.12 mmol), DIEA (38 pL, 0.22 mmol) and HATU (42 mg, 0.11 mmol). The reaction was stirred overnight at room temperature. The reaction mixture was poured into water and extracted with EtOAc. The combined organic layers were washed with 0.1 N NaOH, 0.1 N HCI, and brine; dried over sodium sulfate and concentrated in vacuo to yield 49 as an oil (49 mg, 94%). HPLC- MS tR = 2.10 min (UV254 nm); mass calculated for formula C24H27F2N3O6S 523.2, observed LCMS m/z 524.4 (M+H) ; purity > 95% (ELSD).

115761-79-0, As the paragraph descriping shows that 115761-79-0 is playing an increasingly important role.

Reference£º
Patent; SCHERING CORPORATION; WO2005/121130; (2005); A2;,
Piperazine – Wikipedia
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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.

d) 1-(5-fftert-butyldimethylsilyloxy)methynpyridin-2-yl)piperidin-4-yl4- isopropyl-piperazine-1-carboxylate To a solution of 1-(5-((tert-butyldimethylsilyloxy)methyl)pyridin-2-yl)- piperidin-4-ol (257 mg, 1 mmol) in DCM (8 mL) was added BTC (297 mg, 1 mmol) and Et3N (152 mg, 1.5 mmol). The mixture was stirred at rt for 1 h before 1-isopropylpiperazine (128 mg, 1 mmol) was addedand the resulting mixture was stirred at rt overnight. The mixture was diluted with DCM (20 mL), washed with saturated K2C03?(20 mL) solution and brine (20 mL), dried andconcentrated to give the desired product as yellow oil (350 mg, 74percent). [LCMS: RtA?= 1.95min, m/z 477.2 [M+H]+].

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

Reference£º
Patent; NOVARTIS AG; WANG, Tielin; ZHANG, Xuechun; WO2013/50987; (2013); A1;,
Piperazine – Wikipedia
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.5308-25-8,1-Ethylpiperazine,as a common compound, the synthetic route is as follows.

5308-25-8, 0.20 g of N-[4-tert-butyl-5-(2,4-dichlorobenzyl)thiazol-2-yl]chloroacetamide and 5 mL of tetrahydrofuran, Stir at room temperature, 0.12 g of pyridine and 0.11 g of N-ethylpiperazine are added; Reaction overnight, Desolvent, Add dichloromethane, Saturated salt water wash, Drying with anhydrous sodium sulfate, Desolvent, Add petroleum ether to precipitate solids, Suction filtration Wash with petroleum ether, Dried to obtain beige solid N-[4-tert-butyl-5-(2,4-dichlorobenzyl)thiazol-2-yl]-2-(4-ethylpiperazinyl)acetamide, yield 77.9 %,

As the paragraph descriping shows that 5308-25-8 is playing an increasingly important role.

Reference£º
Patent; Hunan University; Hu Aixi; Wu Zhilin; Ding Na; Ye Jiao; (20 pag.)CN107365280; (2017); 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.129799-15-1,Methyl 1-Boc-piperazine-2-carboxylate,as a common compound, the synthetic route is as follows.

To a solution of l-(4-(bromomethyl)benzyl)pyridin-2(lH)-one (600 mg, 2.15 mmol, 1.0 eq) in CH3CN (5 mL) were added K2CO3 (0.89 g, 6.45 mmol, 3.0 eq) and 1-tert-butyl 2-methyl piperazine-l,2-dicarboxylate (1.05 g, 4.32 mmol, 2.0 eq). The mixture was heated at 80 C overnight, and then concentrated to dryness under reduced pressure. The residue was mixed with water (10 mL) and extracted with EA (10 mL X 3). The combined organic layers were washed with brine (10 mL), dried over anhydrous Na2S04 and concentrated. The residue was purified via flash chromatography to afford 1-tert-butyl 2-methyl 4-(4-((2-oxopyridin-l(2H)- yl)methyl)benzyl)p

129799-15-1, The synthetic route of 129799-15-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; LIFESCI PHARMACEUTICALS, INC.; MCDONALD, Andrew; WO2015/103317; (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.129779-30-2,(3R,5S)-rel-tert-Butyl 3,5-dimethylpiperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

To a 20 mL microwave reactor vial was added (3R,5S)-tert-butyl 3,5-dimethylpiperazine- 1 -carboxylate (250 mg, 1.1 67mmol), 1,3 -dibromo-5 -fluorobenzene(592 mg, 2.333 mmol), C52CO3 (950 mg, 2.92 mmol) and toluene (4 mL). The vessel was purged and degassed with N2, then 2,2?-bis(diphenylphosphino)- 1,1 ?-binaphthalene(109 mg, 0.175 mmol) and palladium(II) acetate (52.4 mg, 0.23 3 mmol) were added. The reaction vessel was purged and degassed again. The reaction vessel was capped and the mixture was stirred at 110 C overnight. The reaction mixture was filtered and washed with MeOH and then solvent was removed. The crude was diluted with EtOAc (20 mL),and washed with H20 (20 mL). The orange organic layer was washed with brine, dried over with MgSO4, then concentrated to give crude tert-butyl 4-(3-bromo-5-fluorophenyl) piperazine-1-carboxylate, which was then dissolved in 20% TFA in DCM. The mixture was stirred for 2 hours, concentrated, and then purified by SCX resin (CUBCX1-HL (Benzenesulfonyl, H.L. Resin, 5 g) to provide 1 -((cis)-4-(3 -bromo-5 -fluorophenyl)-3 ,5-dimethylpiperazine, which used directly for next step. LCMS (M+H) = 287.1, 289.1 (1:1 ratio).

129779-30-2, As the paragraph descriping shows that 129779-30-2 is playing an increasingly important role.

Reference£º
Patent; BRISTOL-MYERS SQUIBB COMPANY; BHIDE, Rajeev S.; BATT, Douglas G.; CHERNEY, Robert J.; CORNELIUS, Lyndon A.M.; LIU, Qingjie; MARCOUX, David; NEELS, James; POSS, Michael A.; QIN, Lan-ying; RUAN, Zheming; SHI, Qing; SRIVASTAVA, Anurag S.; TINO, Joseph A.; WATTERSON, Scott Hunter; (532 pag.)WO2016/64957; (2016); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics