Tag: M.W:200-300

208167-83-3, tert-Butyl 4-(2-chloroethyl)piperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(a) Preparation of N-[1-butyl-4-[3-{2-(4-tert-butoxycarbonyl-1-piperazinyl)ethoxy}phenyl]-1,2-dihydro-2-oxo-1,8-naphthyridin-3-yl]-N’-(2,6-diisopropylphenyl)urea STR99 The title compound was obtained in the same manner as in Example 41 from N-[4-(3-hydroxyphenyl)-1,2-dihydro-2-oxo-1,8-naphthyridin-3-yl]-N’-(2,6-diisopropylphenyl)urea and 1-tert-butoxycarbonyl-4-(2-chloroethyl)piperazine. 1 H-NMR delta (CD3 OD) 8.63 (1H, dd, J=4.6 Hz, 1.7 Hz), 7.75 (1H, dd, J=7.9 Hz, 1.7 Hz), 7.47 (1H, dd, J=8.2 Hz, 7.9 Hz), 7.04-7.30 (5H, m), 6.93-7.04 (2H, m), 4.60-4.73 (2H, m), 4.05-4.10 (2H, m), 3.38-3.53 (4H, m), 2.92-3.10 (2H, m), 2.55-2.68 (2H, m), 2.36-2.54 (4H, m), 1.95-2.10 (2H, m), 1.70-1.90 (2H, m), 1.45-1.62 (2H, m), 1.49 (9H, s), 1.15 (12H, d, J=6.6 Hz), 1.05 (3H, t, J=7.3 Hz)

208167-83-3, The synthetic route of 208167-83-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Sumitomo Pharmaceuticals Company, Ltd.; US5843957; (1998); 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.30459-17-7,1-(4-Trifluoromethylphenyl)piperazine,as a common compound, the synthetic route is as follows.

To a solution of 2-CHLORO-5-METHANESULFONYL-BENZOIC acid (102mg, 0.43 mmol) in dimethylformamide (20 ml) were successively added TBTU (153mg, 0.48 mmol), N- ETHYLDIISOPROPYLAMINE (0.28 ML, 2.17 mmol) and 1- (4-TRIFLUROMETHYLPHENYL) piperazine (ABCR F07741NB, [30459-17-7], 100 mg, 0.43 mmol). The reaction was then stirred at room temperature for two hours, then concentrated in vacuo and purified by column chromatography (SI02, 50g, heptane/ethylacetate = 0 to 100%), to give the title compound as a colorless gum (170 mg, 0.38 mmol). MS (m/e): 464.3 (M+NH4+, 100%), 30459-17-7

30459-17-7 1-(4-Trifluoromethylphenyl)piperazine 121718, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; WO2005/23260; (2005); 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.132710-90-8,1-Boc-4-(3-hydroxypropyl)piperazine,as a common compound, the synthetic route is as follows.

To 0.5 g (2.05 mmol) of tert-butyl 4-(3-hydroxypropyl)piperazine-1-carboxylate, 0.3 g (2.46 mmol) of 4-hydroxybenzaldehyde and 1 g (3.07 mmol) of resin-supported triphenyl-phosphine (3 mmol/g of resin) diluted in 14.5 ml of anhydrous tetrahydrofuran, is added dropwise at 0C under argon 0.614 ml (3.07 mmol) of diisopropyldiazene-1,2-dicarboxylate. The reaction mixture is stirred at room temperature for 20h. The solid is filtered then rinsed in dichloromethane. The filtrate is concentrated and diluted in a sodium hydroxide solution (1M) and the product is extracted several times with ethyl acetate. The organic phases are combined, dried over magnesium sulfate, and concentrated. The residue is purified by chromatography on silica (cyclohexane/ethyl acetate eluent: 4:6 to 100% ethyl acetate) to yield 0.58 g of tert-butyl 4-(3-(4-formylphenoxy)propyl)piperazine-l-carboxylate in the form of a colourless oil.LCMS (ESI, m/z): (M+l) 348.91H-NMR: deltaEta pm 400 MHz, DMSO: 9.87 (1H, s, CHO), 7.86 (2H, d, CH^), 7.12 (2H, d, CHaro , 4.13 (2H, t, CH2), 3.28-3.31 (4H, m, 2CH2), 2.44 (2H, t, CH2),2.31-2.34 (4H, m, 2CH2), 1.91 (2H, q, CH2), 1.40 (9H, s, 3CH3).

132710-90-8, As the paragraph descriping shows that 132710-90-8 is playing an increasingly important role.

Reference£º
Patent; PIERRE FABRE MEDICAMENT; BEDJEGUELAL, Karim; RABOT, Remi; KALOUN, El Bachir; MAYER, Patrice; MARCHAND, Arnaud; RAHIER, Nicolas; SCHAMBEL, Philippe; BIENAYME, Hugues; WO2011/45344; (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.262368-30-9,N-(4-Aminophenyl)-N-methyl-2-(4-methylpiperazin-1-yl)acetamide,as a common compound, the synthetic route is as follows.

Add to the reaction flask(E) -4 – [(2-methoxybenzylidene)Benzyl acetate-2-yl]3-nitrobenzoate (III) (4.47 g, 10 mmol),N- (4-aminophenyl) -N-methyl-2- (4-methylpiperazin-1-yl)Acetamide (IV)(2.88 g, 11 mmol) and 50 mL of dioxane, the temperature was raised to 80-85 C and the reaction was stirred for 2.5 hours.Cooled to room temperature, acid-added acid lithium carbonate (1.1 g) was added, and the mixture was stirred at room temperature for 3 hours.The reaction solution was poured into 150 mL of water to precipitate a solid.The crude product was recrystallized from methanol to give a pale yellow solid (Z) -4 – {[2- (N-methyl-2- (4-methylpiperazin-1-yl)Acetamidanilide) benzylidene]Benzyl acetate-2-yl}3-nitrobenzoate(V) 4.93 g, yield 73.9%.

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

Reference£º
Patent; Suzhou Mirac Pharma Technology Co.,Ltd; Xu, Xuenong; (7 pag.)CN104262232; (2016); B;,
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.314741-39-4,(S)-1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate,as a common compound, the synthetic route is as follows.

314741-39-4, A solution of 3-iodopicolinic acid 2a (1.8 g, 7.23 mmol), (S)-l-tert-butyl 3-methyl piperazine-1,3- dicarboxylate (1.766 g, 7.23 mmol), HATU (3.02 g, 7.95 mmol), DIEA (5.05 mL, 28.9 mmol) in DCM (100 mL) / Acetonitrile (20 mL) was stirred at r.t. for 12 h. DCM (50 mL) and satd. H4Cl (100 mL) were added. The DCM layer was washed with brine, dried over Na2S04, filtered and concentrated. The reaction was purified by column chromatography and the product was eluted by EtOAc to yield (S)-l-tert-butyl 3-methyl 4-(3-iodopicolinoyl)piperazine-l,3-dicarboxylate 2b.

314741-39-4 (S)-1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate 1501855, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; MERCK SHARP & DOHME CORP.; RAO, Ashwin, U.; MCKITTRICK, Brian Alexander; LOMBARDO, Matthew; HICKS, Jacqueline, D.; MCCRACKEN, Amy Bittner; CHU, Hong Dong; SO, Sung-Sau; ORTH, Peter; WU, Zhicai; LAN, Ping; DEBENHAM, John, S.; WHITEHEAD, Brent, R.; TAYLOR, Jerry, A.; SUN, Zhongxiang; KATIPALLY, Revathi Reddy; GABLE, Jonathan, E.; DAHLGREN, Markus, K.; BHAT, Sathesh, P.; (104 pag.)WO2018/93695; (2018); 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.

169447-70-5, To a stirred solution of tert-butyl (2S)-2-methylpiperazine-1-carboxylate(1 g, 4.99 mmol, 1 equiv.) and DIEA(1.3 g, 9.99 mmol, 2 equiv.) in DMA(10 mL) was added 4,5-dibromo-2,3- dihydropyridazin-3-one (1.5 g, 5.91 mmol, 1.183 equiv.) in portions at 100 degrees C overnight. The reaction liquid was purified by reverse phase flash with the following conditions: (0292) MeCN/H2O (NH4CO3: 5%) (MeCN: 50%-95%,40 min) to afford tert-butyl (2S)-4-(5-bromo-6- oxo-1,6-dihydropyridazin-4-yl)-2-methylpiperazine-1-carboxylate(1.2g,64.39%) as a yellow solid.

The synthetic route of 169447-70-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GOLDFINCH BIO, INC.; YU, Maolin; DANIELS, Matthew, H.; HARMANGE, Jean-christophe, P.; TIBBITTS, Thomas, T.; LEDEBOER, Mark, W.; WALSH, Liron; MUNDEL, Peter, H.; MALOJCIC, Goran; (860 pag.)WO2019/55966; (2019); A2;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

889958-14-9, 1-Boc-2-oxopiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

889958-14-9, EXAMPLE 35 t-Butyl 3-Oxo-2-(alpha-hydroxy-4-fluorobenzyl)-1-piperazine carboxylate (35) To a solution of diisopropylamine (3.1 ml, 22 mmole) and dry THF (5 ml) at 0 C. under argon is added dropwise a hexane solution of n-butyllithium (13.8 ml, 22 mmole). After 3/4 hour, a solution of 2 (2.0 g, 10 mmole) in 75 ml of dry THF is added dropwise and stirred at 0 C. for 3 hours and 4-fluoro-benzaldehyde (13.6 g, 11 mmole) added dropwise. The reaction mixture was stirred at room temperature for 68 hours, poured into water, and extracted into ether. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure, and the residue recrystallized from ethanol to give 35. M.p. 219 C. (dec.)

889958-14-9 1-Boc-2-oxopiperazine 21868412, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; Richardson-Merrell Inc.; US4341698; (1982); A;,
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

To a solution of tert-butyl 3-oxopiperazine-1-carboxylate (5.00 g, 25.0 mmol) in DMF (50 mL) at 0 C. was added NaH (60% in mineral oil, 1.20 g, 30.0 mmol). The mixture was stirred for 30 min, and then methyl 2-bromoacetate (2.60 mL, 27.5 mmol) was added. The reaction was stirred at room temperate for 16 hours, then quenched with H2O (50 mL) and extracted with EtOAc (50 mL¡Á3). The combined organic extracts were washed with brine, dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by silica gel column (pet ether:EtOAc 5:1 to 2:1) to afford the desired compound as a colorless oil (4.0 g). Yield 59% (86% purity, UV=214 nm, ESI 217.0 (M+H)+)., 76003-29-7

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

Reference£º
Patent; Lazuli, Inc.; Harrison, Bryce A.; Bursavich, Matthew G.; Brewer, Mark; Gerasyuto, Aleksey I.; Hahn, Kristopher N.; Konze, Kyle D.; Lin, Fu-Yang; Lippa, Blaise S.; Lugovskoy, Alexey A.; Rogers, Bruce N.; Svensson, Mats A.; Troast, Dawn M.; (172 pag.)US2018/244648; (2018); 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.1188265-73-7,tert-Butyl 3-(2-hydroxyethyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.,1188265-73-7

Step 2: 3-(2-Hydroxy-ethyl)-piperazine-1-carboxylic acid tert-butyl ester (58 mg, 0.25 mmol) was dissolved in 4 mL of dichloromethane and 1 mL of DIPEA, and then triphosgene (27 mg, 0.09 mmol) was added at room temperature. The reaction mixture was stirred for 30 minutes, and the solvent was removed in vacuo. The residue was dissolved in 3 mL of dichloromethane and 1 mL of TFA. After the reaction mixture was stirred for 1 hour, the solvent was removed in vacuo to give hexahydro-pyrazino[1,2-c][1,3]oxazin-6-one trifluoro acetitic acid salt (Compound D) as a crude product which was used directly without further purification. LC/MS: calc’d 157 (MH+), exp 157 (MH+).

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

Reference£º
Patent; HOFFMANN-LA ROCHE INC.; Guo, Lei; Hu, Taishan; Kou, Buyu; Lin, Xianfeng; Shen, Hong; Shi, Houguang; Yan, Shixiang; Zhang, Weixing; Zhang, Zhisen; Zhou, Mingwei; Zhu, Wei; US2015/252057; (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.278788-66-2,(R)-tert-Butyl 3-(hydroxymethyl)piperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

To a stirred solution of (R)-tert-butyl 3-(hydroxymethyl)piperazine-1-carboxylate (231 mg, 1.07mmol), 2-(4-(bromomethyl)phenyl)-1 ,1 ,1 ,3,3,3-hexafluoropropan-2-ol (400mg, 1.19mmol) and sodium iodide (18mg, 0.12mmol) in acetonitrile (1 OmL) was added potassium carbonate (655mg, 4.75mmol). The reaction mixture was stirred at room temperature for 3 days, before being diluted with dichloromethane (1 OmL), filtered through cotton wool and concentrated under reduced pressure. The residue was purified by flash column chromatography (eluting with dichloromethane to 10% methanol in dichloromethane) to afford the intermediate (R)-tert-butyl 4-(4-(1 ,1 ,1 ,3,3,3-hexafluoro-2- hydroxypropan-2-yl)benzyl)-3-(hydroxymethyl)piperazine-1-carboxylate (250mg, 0.53mmol). To a stirred solution of (R)-tert-butyl 4-(4-(1 ,1 ,1 ,3,3,3-hexafluoro-2- hydroxypropan-2-yl)benzyl)-3-(hydroxymethyl)piperazine-1-carboxylate (220mg, 0.466mmol) in dichloromethane (3mL), was added trifluoroacetic acid (3mL, 38.3mmol). The reaction mixture was stirred at room temperature for 5 hours before being purified directly by SCX chromatography, eluting with 2N ammonia in methanol solution to afford the title compound (165mg). MS (ESI) m/z 373.3 [M+H]+, 278788-66-2

278788-66-2 (R)-tert-Butyl 3-(hydroxymethyl)piperazine-1-carboxylate 24820286, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; N.V. ORGANON; WO2009/138438; (2009); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics