Category: 170911-92-9

170911-92-9, tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a 250 mL round bottom flask was added 5 g (18.1 mmol) of crude I-f,Nitro-lH-pyrazole-3-carboxylic acid (3.1 g, 19.9 mmol)EDC · HCl 4.1 g (21.7 mmol),HOBt 2.9 g (21.7 mmol) and anhydrous DMF 50 mL,Stir at room temperature for 24 hTLC detects the disappearance of the starting material (methanol: chloroform = 1:10).The reaction solution was poured into 200 mL of ice water,Precipitation of a large number of light yellow solid, standing,Consider the yellow solid,The crude product was recrystallized from a mixed solvent of ethyl acetate and methanol to give 4.7 g of (I-g)Yield 62.4%., 170911-92-9

As the paragraph descriping shows that 170911-92-9 is playing an increasingly important role.

Reference：
Patent; China Pharmaceutical University; Lu Shuai; Wang Yue; Zhi Yanle; Yao Chao; Lu Tao; Li Baoquan; Chen Puzhou; Bao Jiyin; (27 pag.)CN107245073; (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.170911-92-9,tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

To a stirred solution of 6-iodo-8-methyl-2-(methylthio)pyrido[2,3- d]pyrimidin-5(8H)-one (100 mg, 0.30 mmol) in toluene (2mL) at 0 C under nitrogen was added mCPBA (<77% pure)(78 mg, 0.35 mmol) in DCM (2 mL) . After 30 mi DIPEA(0.157 mL, 0.90 mmol) was added, followed by the additionof tert-butyl 4-(4-aminophenyl)piperazine-1-carboxylate(92 mg, 0.33 mmol) in toluene (1.0 mL) . The reactionmixture was stirred at 60 C until deemed complete byLCMS analysis. The reaction mixture was cooled to RT and diluted with DCM (15 mL) and brine (10 mL) and extracted. The organic portion was dried (Phase Separator) and concentrated in vacuo. The residue obtained was purified by flash chromatography (0-100%, EtOAc in cyclohexane) toafford the title compound (44.0 mg, 26%) as a yellow solid. LCMS (Method A) : = 1.33 mi m/z = 563 [M+H]., 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; ALMAC DISCOVERY LIMITED; ROUNTREE, James Samuel Shane; O’DOWD, Colin Roderick; BURKAMP, Frank; BELL, Mark Peter; WO2015/19037; (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.170911-92-9,tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

To a stirred solution of 6-iodo-8-methyl-2-(methylthio)pyrido[2,3- d]pyrimidin-5(8H)-one (100 mg, 0.30 mmol) in toluene (2mL) at 0 C under nitrogen was added mCPBA (<77% pure)(78 mg, 0.35 mmol) in DCM (2 mL) . After 30 mi DIPEA(0.157 mL, 0.90 mmol) was added, followed by the additionof tert-butyl 4-(4-aminophenyl)piperazine-1-carboxylate(92 mg, 0.33 mmol) in toluene (1.0 mL) . The reactionmixture was stirred at 60 C until deemed complete byLCMS analysis. The reaction mixture was cooled to RT and diluted with DCM (15 mL) and brine (10 mL) and extracted. The organic portion was dried (Phase Separator) and concentrated in vacuo. The residue obtained was purified by flash chromatography (0-100%, EtOAc in cyclohexane) toafford the title compound (44.0 mg, 26%) as a yellow solid. LCMS (Method A) : = 1.33 mi m/z = 563 [M+H]., 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; ALMAC DISCOVERY LIMITED; ROUNTREE, James Samuel Shane; O’DOWD, Colin Roderick; BURKAMP, Frank; BELL, Mark Peter; WO2015/19037; (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.170911-92-9,tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

To a stirred solution of 6-iodo-8-methyl-2-(methylthio)pyrido[2,3- d]pyrimidin-5(8H)-one (100 mg, 0.30 mmol) in toluene (2mL) at 0 C under nitrogen was added mCPBA (<77% pure)(78 mg, 0.35 mmol) in DCM (2 mL) . After 30 mi DIPEA(0.157 mL, 0.90 mmol) was added, followed by the additionof tert-butyl 4-(4-aminophenyl)piperazine-1-carboxylate(92 mg, 0.33 mmol) in toluene (1.0 mL) . The reactionmixture was stirred at 60 C until deemed complete byLCMS analysis. The reaction mixture was cooled to RT and diluted with DCM (15 mL) and brine (10 mL) and extracted. The organic portion was dried (Phase Separator) and concentrated in vacuo. The residue obtained was purified by flash chromatography (0-100%, EtOAc in cyclohexane) toafford the title compound (44.0 mg, 26%) as a yellow solid. LCMS (Method A) : = 1.33 mi m/z = 563 [M+H]., 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; ALMAC DISCOVERY LIMITED; ROUNTREE, James Samuel Shane; O’DOWD, Colin Roderick; BURKAMP, Frank; BELL, Mark Peter; WO2015/19037; (2015); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

170911-92-9, tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

4-(4-Aminophenyl)-l-piperazinecarboxylic acid 1,1-dimethylethyl ester (1.00 g, 3.61 mmol), 1,3-benzenedicarboxylic acid 1 -methyl ester (4.33 mmol), O-benzotriazolyl tetramethylisouronium tetrafluoroborate (TBTU) (5.03 mmol) and Et3N (1.50 ml, 10.7 mmol) were mixted in CH3CN (10 ml) and stirred at room temperature for 5 hours. The crystalline product was filtered off from the reaction mixture, washed with H2O and dried on the air. Yield: 1.262 g of intermediate 42 (80 %).

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; JANSSEN PHARMACEUTICA N.V.; WO2008/148849; (2008); A2;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

170911-92-9, tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

4-(4-Aminophenyl)-l-piperazinecarboxylic acid 1,1-dimethylethyl ester (1.00 g, 3.61 mmol), 1,3-benzenedicarboxylic acid 1 -methyl ester (4.33 mmol), O-benzotriazolyl tetramethylisouronium tetrafluoroborate (TBTU) (5.03 mmol) and Et3N (1.50 ml, 10.7 mmol) were mixted in CH3CN (10 ml) and stirred at room temperature for 5 hours. The crystalline product was filtered off from the reaction mixture, washed with H2O and dried on the air. Yield: 1.262 g of intermediate 42 (80 %).

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; JANSSEN PHARMACEUTICA N.V.; WO2008/148849; (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.170911-92-9,tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

A mixture of 8-cyclopentyl-2-methanesulfinyl-6-(5-methyl-[1,3,4]oxadiazol-2-ylmethyl)-8H-pyrido[2,3-d]pyrimidin-7-one (185 mg, 0.495 mmol) and 4-(4-amino-phenyl)-piperazine-1-carboxylic acid tert-butyl ester (247 mg, 0.892 mmol, 1.8 eq) were dissolved in DMSO (2.5 mL) and heated at 80 C. for 2 days. Succinic anhydride (70 mg) was added to react with the excess aniline and the mixture was heated at 80 C. for 3 h. The reaction mixture was partitioned between ethyl acetate and H2O. The organic layer was washed with saturated NaHCO3 (2×), H2O and brine, dried over Na2SO4 and concentrated to give an orange foam. Purification by liquid chromatography (2-4% MeOH/CH2Cl2) gave 4-{4-[8-cyclopentyl-6-(5-methyl-[1,3,4]oxadiazol-2-ylmethyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-phenyl}-piperazine-1-carboxylic acid tert-butyl ester as a yellow foam (202 mg, 0.344 mmol, 70%). The structure was confirmed by NMR and mass spectrometry. MS: APCl: M+1: 587.1 (Exact Mass: 586.30)., 170911-92-9

The synthetic route of 170911-92-9 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; PFIZER INC; US2006/142312; (2006); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

170911-92-9, tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

mCPBA (<77% pure) (4.5 mg, assumed 0.020 mmol) in DCM (0.5 ml) was added to a stirred solution of 6- (2 , 6 -dichlorophenyl ) -8-methyl-2- (methylthio)pyrido [4 , 3 -d] pyrimidin-5 (6H) -one (6.1 mg, 0.017 mmol) in toluene (1.0 mL) at RT under nitrogen. After 1.5 h, DIPEA (9.0 mu-,, 0.052 mmol) and tert-butyl 4-(4- aminophenyl) piperazine-l-carboxylate (5.3 mg, 0.019 mmol) [commercially available] in toluene (0.5 ml) were added, successively, and the temperature was increased to 60 C. After 16 h, the reaction mixture was allowed to cool to RT, and was loaded directly onto a column and purified by flash chromatography (0-100%, EtOAc in cyclohexane) to give the title compound (5.4 mg, 54%) as a yellow oil. LCMS (Method A): RT = 1.61 min, m/z = 581, 583 [M+H]+ 170911-92-9, The synthetic route of 170911-92-9 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ALMAC DISCOVERY LIMITED; O’DOWD, Colin Roderick; ROUNTREE, James Samuel Shane; BURKAMP, Frank; WILKINSON, Andrew John; WO2014/167347; (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.170911-92-9,tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

A mixture of 8-cyclopentyl-2-methanesulfinyl-6-(5-methyl-[1,3,4]oxadiazol-2-ylmethyl)-8H-pyrido[2,3-d]pyrimidin-7-one (185 mg, 0.495 mmol) and 4-(4-amino-phenyl)-piperazine-1-carboxylic acid tert-butyl ester (247 mg, 0.892 mmol, 1.8 eq) were dissolved in DMSO (2.5 mL) and heated at 80 C. for 2 days. Succinic anhydride (70 mg) was added to react with the excess aniline and the mixture was heated at 80 C. for 3 h. The reaction mixture was partitioned between ethyl acetate and H2O. The organic layer was washed with saturated NaHCO3 (2×), H2O and brine, dried over Na2SO4 and concentrated to give an orange foam. Purification by liquid chromatography (2-4% MeOH/CH2Cl2) gave 4-{4-[8-cyclopentyl-6-(5-methyl-[1,3,4]oxadiazol-2-ylmethyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-phenyl}-piperazine-1-carboxylic acid tert-butyl ester as a yellow foam (202 mg, 0.344 mmol, 70%). The structure was confirmed by NMR and mass spectrometry. MS: APCl: M+1: 587.1 (Exact Mass: 586.30)., 170911-92-9

The synthetic route of 170911-92-9 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; PFIZER INC; US2006/142312; (2006); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

170911-92-9, tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

mCPBA (<77% pure) (4.5 mg, assumed 0.020 mmol) in DCM (0.5 ml) was added to a stirred solution of 6- (2 , 6 -dichlorophenyl ) -8-methyl-2- (methylthio)pyrido [4 , 3 -d] pyrimidin-5 (6H) -one (6.1 mg, 0.017 mmol) in toluene (1.0 mL) at RT under nitrogen. After 1.5 h, DIPEA (9.0 mu-,, 0.052 mmol) and tert-butyl 4-(4- aminophenyl) piperazine-l-carboxylate (5.3 mg, 0.019 mmol) [commercially available] in toluene (0.5 ml) were added, successively, and the temperature was increased to 60 C. After 16 h, the reaction mixture was allowed to cool to RT, and was loaded directly onto a column and purified by flash chromatography (0-100%, EtOAc in cyclohexane) to give the title compound (5.4 mg, 54%) as a yellow oil. LCMS (Method A): RT = 1.61 min, m/z = 581, 583 [M+H]+ 170911-92-9, The synthetic route of 170911-92-9 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ALMAC DISCOVERY LIMITED; O’DOWD, Colin Roderick; ROUNTREE, James Samuel Shane; BURKAMP, Frank; WILKINSON, Andrew John; WO2014/167347; (2014); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics