Category: 21655-48-1piperazines

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.

Step 1: 2-chloro-5-nitropyridine (5 g, 32 mmol) and K2CO3 (8.8 g, 64 mmol) were dissolved in acetonitrile (40 mL), compound 245-1 (4.3 g, 38.4 mmol) was added. The reaction mixture was stirred at 80¡ãC for 1h, then the reaction mixture was filtrated, concentrated to deliver compound 245-3 (4.5 g) as yellow solid. MS ESI calcd for C11H16N4O2 [M+H]+ 237, found 237., 21655-48-1

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

Reference£º
Patent; GUANGDONG ZHONGSHENG PHARMACEUTICAL CO., LTD; WU, Hao; LIN, Jun; LI, Yunhui; WEI, Changqing; CHEN, Shuhui; LONG, Chaofeng; CHEN, Xiaoxin; LIU, Zhuowei; CHEN, Lijuan; (212 pag.)EP3124482; (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.21655-48-1,cis-2,6-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

A mixture of intermediate 47 (0.49 g; 0.85 mmol) and cis 2,6-dimethylpiperazine (0.2 g; 1.7 mmol) in MeOH (6 mL) was stirred at room temperature overnight. Sodium triacetoxyborohydride (0.54 g; 2.6 mmol) was added to the reaction mixture and stirred 3 hours at room temperature. The solution was poured into cooled water and basified with K2CO3 powder and the product was extracted with EtOAc. The organic layer was separated, dried over MgSC , filtered and evaporated to dryness. The residue (0.625 g) was purified by chromatography over silica gel (Irregular SiOH, 15-40 muiotaeta, gradient from 97percent DCM 3percent CH3OH 0.1percent NH4OH to 85percent DCM 15percent CH3OH 0.1percent NH4OH). The fractions containing the product were collected and evaporated to dryness to afford 0.347 g (61percent) of intermediate 49., 21655-48-1

21655-48-1 cis-2,6-Dimethylpiperazine 6950261, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; JANSSEN PHARMACEUTICA NV; MEVELLEC, Laurence, Anne; MEERPOEL, Lieven; COUPA, Sophie; PONCELET, Virginie, Sophie; PILATTE, Isabelle, Noelle, Constance; PASQUIER, Elisabeth, Therese, Jeanne; BERTHELOT, Didier, Jean-Claude; QUEROLLE, Olivier, Alexis, Georges; MEYER, Christophe; ANGIBAUD, Patrick, Rene; DEMESTRE, Christophe, Gabriel, Marcel; MERCEY, Guillaume, Jean, Maurice; (203 pag.)WO2016/97359; (2016); 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

To a solution of (2i?,65)-2,6-dimethylpiperazine (8.0 g, 70.1 mmol) in DCM (70 niL) was added triethylamine (9.78 niL, 70.1 mmol). The reaction mixture was cooled to 0 0C and benzyl chlorocarbonate (9.86 mL, 70.1 mmol) was added. After stirring at 0 0C for 1 hour, the reaction was warmed to rt. The reaction mixture was washed with brine, dried (Na2SO4), concentrated and the residue purified with silica chromatography (Hex:EtOAc 1 :1 to EtOAc to EtOAc:MeOH 10:1) to give 13.48g (77 percent) of a colorless oil

21655-48-1, The synthetic route of 21655-48-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2009/136191; (2009); 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

To a solution of cis-2,6-dimethyl-piperazine (600 mg) and triethylamine (0.80 mL) in dichloromethane (10 mL) at 0¡ã C. was added dropwise methanesulfonyl chloride (0.43 mL). The reaction mixture was stirred at room temperature for 16 h and then quenched with water (10 mL) and extracted into dichloromethane (2*20 mL). The combined organic layers were washed with saturated aqueous brine solution (2*20 mL), dried (MgSO4) and concentrated to afford (3S,5R)-1-methanesulfonyl-3,5-dimethyl-piperazine as a white solid (817 mg, 81percent). Reaction between 6-(bromomethyl)-2-chloro-4-morpholinothieno[3,2-d]pyrimidine and (3S,5R)-1-methanesulfonyl-3,5-dimethyl-piperazine using potassium carbonate and acetonitrile yielded 2-chloro-6-((2S,6R)-4-methanesulfonyl-2,6-dimethyl-piperazin-1-ylmethyl)-4-morpholin-4-yl-thieno[3,2-d]pyrimidine. This compound was subjected to procedure A to yield the desired final compound which was purified using flash chromatography. [M+H]+ 542.24 NMR: (400 MHz, CDCl3): 1.18 (6H, d, J 6.90, Me), 2.48-2.52 (2H, m, CH2), 2.72 (3H, s, SO2Me), 2.78-2.88 (2H, m, CH2), 3.51-3.56 (2H, m, CH2), 3.81-3.88 (4H, m, CH2), 3.96-4.02 (4H, m, CH2), 4.12 (2H, s, CH2), 7.28 (1H, s, Ar), 7.42 (1H, t, J 8.22, Ar), 7.49 (1H, d, J 8.31, Ar), 8.20 (1H, d, J 7.26, Ar) 8.94 (1H, s, Ar) and 10.08 (1H, s, NH).

21655-48-1, The synthetic route of 21655-48-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Piramed Limited; Genentech, Inc.; US2008/76758; (2008); 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.21655-48-1,cis-2,6-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

Example 264 N-[(6-Cyano-3′-{[(3R,5S)-3,5-dimethyl-1-piperazinyl]methyl}-3-biphenylyl)methyl]-N’-{[1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}-1,3-benzenedicarboxamide N-[(6-Cyano-3′-formyl-3-biphenylyl)methyl]-N’-{[1,6-diethyl-4-(tetrahydro-2H-pyran-4-ylamino)-1H-pyrazolo[3,4-b]pyridin-5-yl]methyl}-1,3-benzenedicarboxamide (108 mg, 0.000161 mol) in DCM (4 mL) and (2R,6S)-2,6-dimethylpiperazine (26.7 mg, 0.00023 mol) were mixed with sodium triacetoxyborohydride (68.3 mg, 0.00032 mol) and AcOH (11.6 mg, 11 muL). This solution was stirred overnight at room temperature. LC-MS showed that the reaction was complete. The reaction was quenched with sat. aq. NaHCO3, then extracted with DCM (2*). The combined organic extracts were washed with sat. aq. NaCl, dried (Na2SO4) and concentrated to a glassy foam (122.9 mg). Purification was carried out on Gilson instrument with acetonitrile-water (0.1percent TFA) gradient; C18-RP column. Fractions containing the clean desired product were combined; diluted with EtOAc; washed with sat. aq. NaHCO3; and the aq. phase was back-extracted with EtOAc. Combined organic layers were washed with sat. aq. NaCl and dried (Na2SO4) and concentrated to a residue. It was taken up in a small amount of DCM and transferred to a vial and pumped down to afford the title compound as a white solid [62.3 mg (51percent)]. LC-MS m/z 769.7 (M+H)+., 21655-48-1

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

Reference£º
Patent; Glaxo Group Limited; US2009/197871; (2009); 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.21655-48-1,cis-2,6-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

Example 7 2-(2,8-dimethylimidazo[l,2-b]pyridazin-6-yl)-7-[(3S,5R)-3,5-dimethylpiperazin-l- yl]pyrido[l,2-a]pyrimidin-4-one 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 CH2CI2 and washed with an aqueous saturated solution of NaHC03. The organic layer was separated and dried over Na2S04 and 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, 21655-48-1 cis-2,6-Dimethylpiperazine 6950261, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; PTC THERAPEUTICS INC.; RATNI, Hasane; GREEN, Luke; NARYSHKIN, Nikolai A.; WEETALL, Marla L.; (80 pag.)WO2015/173181; (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.21655-48-1,cis-2,6-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

(a) Step 1 cis-2,6-Dimethylpiperazine (0.114 g, 1.00 mmol) and potassium carbonate (0.0691 g, 0.500 mmol) were added to 4 mL of methylene chloride, and stirred at room temperature. Four milliliters of a methylene chloride solution of the 7-(bromomethyl)-6-methoxybenzofuran-3(2H)-one (0.129 g, 0.500 mmol) described in [WO2011/136319] was added dropwise, and stirring was continued for 12 hours at room temperature. The reaction solution was filtered, and the residue obtained by concentrating the filtrate was purified by silica gel chromatography (methanol/chloroform), and 7-[(cis-3,5-dimethylpiperazin-1-yl)methyl]-6-methoxybenzofuran-3(2H)-one (0.131 g, 90percent) was obtained. 1H NMR (300 MHz, CDCl3) delta 1.03 (d, J=6.6 Hz, 6H), 1.73 (t, J=11.1 Hz, 2H), 2.82 (dd, J=2.1, 11.1 Hz, 2H), 2.87-2.98 (m, 2H), 3.67 (s, 2H), 3.93 (s, 3H), 4.64 (s, 2H), 6.70 (d, J=9.0 Hz, 1H), 7.62 (d, J=9.0 Hz, 1H).

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

Reference£º
Patent; THE UNIVERSITY OF TOKYO; NAGANO, Tetsuo; NAKANO, Hirofumi; HASEGAWA, Tsukasa; SAITO, Nae; KOJIMA, Hirotatsu; OKABE, Takayoshi; MUKAIDA, Naofumi; (42 pag.)US2017/145005; (2017); 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

General procedure for Buchwald-Hartwig couplingIn a oven dried 20 mL round-bottomed flask 2,2′-bis(diphenylphosphino)-l,l’-binaphthyl (racemic) (0.07 g, 0.1 12 mmol) and palladium(II) acetate (0.02 g, 0.089 mmol) in dry toluene (3 ml) were added under N2 atm. followed by addition of (2No.,6S)-2,6-dimethylpiperazine (0.101 g, 0.888 mmol), 12a (0.2 g, 0.740 mmol) and cesium carbonate (0.338 g, 1.037 mmol). Reaction mixture was stirred at 100 ¡ãC for 16 h. After 16 h reaction mixture was cooled, diluted with EtOAc and filtered through celite pad, filtrate was concentrated and purified by column chromatography with a silica gel column and was eluted with 15 percent MeOH in CHC to obtain a pure product 13a, 0.1 g (45 percent)

21655-48-1, 21655-48-1 cis-2,6-Dimethylpiperazine 6950261, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; CAMBRIDGE ENTERPRISE LIMITED; GLEN, Robert; HILEY, Robin; BELL, James; SPRING, David; KAPADNIS, Prashant, Bhimrao; WO2011/98776; (2011); 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.21655-48-1,cis-2,6-Dimethylpiperazine,as a common compound, the synthetic route is as follows.

D. Amination Reaction In one experiment, (Benzotriazol-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate (41.73 g, 94.35 mmol) and triethylamine (88 mL, 630 mmol) were added to a mixture of (R)-2-(1-hydroxycyclohexyl)-2-(3-(trifluoromethoxy)phenyl)acetic acid (20.0 g, 62.9 mmol) and cis-2,6-dimethylpiperazine (7.17 g, 62.9 mmol) in methylene chloride (150 mL) at RT. After stirring for 18 h, the mixture was concentrated in vacuo. The residue was purified by flash chromatography on silica gel (50 to 100percent ethyl acetate in heptane) to afford 1-(3,5-Dimethyl-piperazin-1-yl)-2-(R)-(1-hydroxy-cyclohexyl)-2-(3-trifluoromethoxy-phenyl)-ethanone (24.3g, 93percent).

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

Reference£º
Patent; Wyeth; US2007/135449; (2007); 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

21655-48-1, EXAMPLE 24 Cis-3,5-dimethyl-1-(4-nitro-phenyl)-piperazine A suspension of 6.74 g (47.8 mmol) of 4-fluoro-nitro-benzene and 10.91 g (95.5 mmol) of cis-2,6-dimethyl-piperazine is heated at 45¡ã C. for 1 hour. The reaction mixture is cooled and shaken with dichloromethane and water. The organic layer is dried (magnesium sulfate) and concentrated to give 11.62 g (>100percent) of the product as a solid.

21655-48-1 cis-2,6-Dimethylpiperazine 6950261, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; Booth, Richard John; Dobrusin, Ellen Myra; Josyula, Vara Prasad Venkata Nagendra; McNamara, Dennis Joseph; Toogood, Peter Laurence; US2003/73668; (2003); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics