Tag: M.W:200-300

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.262368-30-9,N-(4-Aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide,as a common compound, the synthetic route is as follows.

Preparation of the Final Compounds: (cr) 3-Z-[1-(4-(N-(4-methyl-piperazin-1-yl-methylcarbonyl)-N-methyl-amino)-anilino)-methylene]-6-ethylcarbamoyl-2-indolinone 160 mg 3-(1-hydroxy-methylene)-6-ethylcarbamoyl-2-indolinone (starting material VIII) and 543 mg N-[(4-methyl-piperazin-1-yl)-methylcarbonyl]-N-methyl-p-phenylendiamine are dissolved in 3 ml of tetrahydrofuran, 506 ml trimethylsilylimidazole are added and the mixture is stirred for 25 minutes at 170 C. in a microwave oven. After cooling the solvent is evaporated and the residue is purified over an aluminum oxide column (activity 2-3) with methylene chloride/ethanol (19:1) as eluant. The residue is recrystallized from ether and vacuum-dried at 80 C. Yield: 0.17 g (52% of theory), Rf value: 0.60 (aluminum oxide, methylene chloride/methanol=9:1) Melting point: 255-260 C. C26H32N6O3 Mass spectrum: m/z=477 [m+H]+, 262368-30-9

As the paragraph descriping shows that 262368-30-9 is playing an increasingly important role.

Reference：
Patent; Boehringer Ingelheim International GmbH; US2006/142373; (2006); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

304897-49-2, tert-Butyl 4-(4-aminobenzyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

d: Ethyl 4-(4-((4-(tert-butoxycarbonyl)piperazin- 1 -yl)methyl)phenylamino)-2-chloro- 6-methylpyrimidine-5-carboxylate Ethyl 2,4-dichloro-6-methylpyrimidine-5-carboxylate (0.5 g, 2.1 mmol) and tert-butyl 4-(4-aminobenzyl)piperazine-l-carboxylate (0.6 g, 2.06 mmol) were dissolved in NMP and stirred at 0C for 2 hour. The reaction mixture was poured onto water and extracted with EtOAc. The organic layer was washed with water, dried over a2S04 and evaporated under vacuum to get the desired compound (0.62 g). XH NMR (400 MHz, CDC13): delta 10.58 (s, 1H), 7.58 (d, J = 6.4 Hz, 2H), 7.31 (d, J = 6.4 Hz, 2H), 4.45 (q, J = 6.8 Hz, 2H), 3.56 (s, 2H), 3.41 (m, 4H), 2.69 (s, 3H), 2.47 (m, 4H), 1.45 (s, 9H), 1.43 (t, J = 6.8 Hz, 3H); MS m/z 490.0 (M+l).

304897-49-2, As the paragraph descriping shows that 304897-49-2 is playing an increasingly important role.

Reference：
Patent; ENDO PHARMACEUTICALS INC.; VENKATESAN, Aranapakam; SMITH, Roger, Astbury; HOSAHALLI, Subramanya; POTLURI, Vijay; PANIGRAHI, Sunil, Kumar; BASETTI, Vishnu; KUNTU, Karunasree; WO2013/28818; (2013); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

314741-40-7, (S)-tert-Butyl 3-(hydroxymethyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A vial was charged with (S)-tert-butyl 3 -(hydroxymethyl)piperazine-l -carboxylate (367.3 mg, 1.647 mmol) and 2-(tert-butoxymethyl)oxirane (243.3 mg, 1.850 mmol) in ethanol (3 mL). The mixture was heated at 120 C for 30 min using microwave. The mixture was cooled to room temperature, concentrated to remove all of solvents. The residue was purified with flash column chromatography on silica gel using 1-10% methanol in dichloromethane to afford the final product as colorless oil (497.5 mg) in 87% yield. NMR (500 MHz, Chloroforn /) delta 3.86 – 3.80 (m, 2H), 3.71 – 3.68 (m, lH), 3.53 – 3.41 (m, 2H), 3.40 – 3.35 (m, 2H), 3.24 (dd, J = 9.1, 6.6 Hz, 1H), 3.10 (br, 1H), 2.91 (m, 1H), 2.83 – 2.75 (m, 1H), 2.48 (dd, J = 13.1, 7.6 Hz, 2H), 2.39 – 2.30 (m, 1H), 1.44 (s, 9H), 1.18, 1.17 (2s, 9 H). MS for C17H34N2O5: 347.2 (MH+)., 314741-40-7

The synthetic route of 314741-40-7 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; NEKTAR THERAPEUTICS (INDIA) PVT. LTD.; NEKTAR THERAPEUTICS; SHARMA, PANKAJ; KHATRI, VIJAY KUMAR; GU, XUYUAN; SONG, YUAN; SHEN, MICHAEL LIXIN; SAUTHIER, JENNIFER RIGGS; ANAND, NEEL K.; KOZLOWSKI, ANTONI; ODINECS, ALEKSANDRS; RILEY, TIMOTHY A.; REN, ZHONGXU; MU. YONGQI; SHEN, XIAOMING; YUAN. XUEJUN; AURRECOECHEA, NATALIA; O’MAHONY, DONOGH JOHN ROGER; WO2015/92819; (2015); 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.34334-28-6,4-(4-Methylpiperazin-1-yl)benzonitrile,as a common compound, the synthetic route is as follows.

To a solution of 13 (1eq.) and CoCl2 6H20(2.1 eq.), NaBH4 (10 eq.) was added. The reaction mixture wasstirred for 5h and then filtered on a celite pad. The organic phase wasevaporated under reduced pressure. The yellow oil was purified by flashchromatography on silica gel (CH2Cl2:MeOH 8:2). Thedesired compound was obtained as a white solid (50%). 1H NMR (400MHz, MeOD): delta(ppm) 2.42(s, 3H); 2.74(t, J=8, 4H); 3.17(t, J=8, 4H), 4.43(s,2H); 6.89(d, J=8, 2H); 7.18(d, J=8, 2H). Anal. Calcd. for C12H19N3:C, 70.20; H, 9.33; N, 20.47; found; C, 70.10; H, 9.13; N, 20.27, 34334-28-6

34334-28-6 4-(4-Methylpiperazin-1-yl)benzonitrile 763205, apiperazines compound, is more and more widely used in various fields.

Reference：
Article; Radi, Marco; Bernardo, Vincenzo; Vignaroli, Giulia; Brai, Annalaura; Biava, Mariangela; Schenone, Silvia; Botta, Maurizio; Tetrahedron Letters; vol. 54; 38; (2013); p. 5204 – 5206;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

5747-48-8, 11-(Piperazin-1-yl)dibenzo[b,f][1,4]thiazepine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,5747-48-8

Example 3: l-(4-Dibenzo[b,f] [l,4]thiazepin-ll-yl-piperazin-l-yl)-ethanoneA solution of PDBTZ (1 mmol) (lmmol) in DMF (2 mL) is treated with acetic anhydride (2 mmol) and heated for one hour. The reaction mixture is evaporated to dryness, made basic with aqueous potassium carbonate, and extracted with dichloromethane. The organic portion is washed (water, brine), dried (sodium sulfate), and evaporated. The crude material is purified by flash chromatography to provide the title compound.

The synthetic route of 5747-48-8 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ASTRAZENECA AB; WO2008/79838; (2008); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

129779-30-2, (3R,5S)-rel-tert-Butyl 3,5-dimethylpiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,129779-30-2

Sodium triacetoxyborohydride (0.32 g, 1 .51 mmol) was added to a solution of tert-butyl (3R,5S)-3,5-dimethylpiperazine-i -carboxylate (0.28 g, 1 .30 mmol) and 4-[2-(dimethyl amino)ethoxy]benzaldehyde (Preparation 18a, 0.25 g, 1.29 mmol) in dichloromethane (10 mL) and the resulting mixture was stirred at room temperature for 4 days. The reaction mixture was washed with 2M aqueous solution of sodium hydroxide and theorganic layer was separated, dried over magnesium sulfate and the solvent evaporated to dryness. 4M Solution of hydrochloric acid in 1,4-dioxane was added to the residue and the resulting mixture was stirred at room temperature for 2 hours. The solvent was evaporated to dryness to yield the hydrochloride salt of the title compound (299 mg, 45%) as a solid.LRMS (mlz): 292 (M+i).

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

Reference：
Patent; ALMIRALL, S.A.; BACH TANA, Jordi; PEREZ CRESPO, Daniel; LLERA SOLDEVILA, Oriol; ESTEVE TRIAS, Cristina; TABOADA MARTINEZ, Lorena; WO2015/86693; (2015); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

129799-15-1, Methyl 1-Boc-piperazine-2-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

4-Methanesulfonyl-piperazine-1,2-dicarboxylic acid 1-tert-butyl ester 10 mmol of Piperazine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester were dissolved in 20 ml methylenchloride. 1.05 eq of DIPEA and mesylchloride were added. The reaction mixture was stirred at room temperature for 30 min. The product was extracted from etylacetate/water. The crude material was redissolved in methanol and treated with 2N NaOH. The reaction mixture was stirred at room temperature for 2 h. The mixture was neutralized with HCl and the product isolated via extraction from ethylacetate/water. MS(ISO): 307.4 (M-H+), 129799-15-1

As the paragraph descriping shows that 129799-15-1 is playing an increasingly important role.

Reference：
Patent; Ackermann, Jean; Bleicher, Konrad; Ceccarelli Grenz, Simona M.; Chomienne, Odile; Mattei, Patrizio; Schulz-Gasch, Tanja; US2007/129544; (2007); 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.262368-30-9,N-(4-Aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide,as a common compound, the synthetic route is as follows.

Preparation of the Final Compounds: (cr) 3-Z-[1-(4-(N-(4-methyl-piperazin-1-yl-methylcarbonyl)-N-methyl-amino)-anilino)-methylene]-6-ethylcarbamoyl-2-indolinone 160 mg 3-(1-hydroxy-methylene)-6-ethylcarbamoyl-2-indolinone (starting material VIII) and 543 mg N-[(4-methyl-piperazin-1-yl)-methylcarbonyl]-N-methyl-p-phenylendiamine are dissolved in 3 ml of tetrahydrofuran, 506 ml trimethylsilylimidazole are added and the mixture is stirred for 25 minutes at 170 C. in a microwave oven. After cooling the solvent is evaporated and the residue is purified over an aluminum oxide column (activity 2-3) with methylene chloride/ethanol (19:1) as eluant. The residue is recrystallized from ether and vacuum-dried at 80 C. Yield: 0.17 g (52% of theory), Rf value: 0.60 (aluminum oxide, methylene chloride/methanol=9:1) Melting point: 255-260 C. C26H32N6O3 Mass spectrum: m/z=477 [m+H]+, 262368-30-9

As the paragraph descriping shows that 262368-30-9 is playing an increasingly important role.

Reference：
Patent; Boehringer Ingelheim International GmbH; US2006/142373; (2006); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics