Tag: M.W:100-200

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.109-07-9,2-Methylpiperazine,as a common compound, the synthetic route is as follows.

A solution of 2-methyl-5-fluoroquinazoline (100 mg; 0.616 MMOL ; 1EQ), 2- methylpiperazine (310 mg; 3.083 MMOL ; 5eq) and triethylamine (0.17 mL; 1.23 MMOL ; 2 eq) in dry DMF (2.5 mL) was heated at 120C for 5 h. The yellow solution was cooled and the solvent was evaporated in vacuo. The crude material was purified on SPE cartridge (Si; 2 g) eluting with a gradient from 100% dichloromethane to 85% DICHLOROMETHANE : 1% NH40H 2M sol in methanol to afford the title compound (D15) (85 mg; yield 57%). MS; (ES) m/z: 243.3 [MH+]. CAHSN4 requires 242.32. ‘H NMR (300MHZ, CDCI3) 8 : 9.48 (s, 1H), 7.81 (t, 1H), 7.48 (d, 1H), 7.10 (d, 1H), 3.03 (m, 1H), 3.23-2. 98-2.76-2. 41 (m, 6H), 2.72 (s, 3H) 1.01 (d, 3H).

109-07-9, The synthetic route of 109-07-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GLAXO GROUP LIMITED; WO2004/46124; (2004); 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.20327-23-5,1-Cyclopropylpiperazine,as a common compound, the synthetic route is as follows.

The 100 mg compound II, 75 mg compound III by adding 5 ml dichloromethane (DCM) in, stirring, 40 C reaction 2 hours, TLC monitoring, after the reaction, the solvent turns on lathe does, the reactant putting into the 100 ml water, ethyl acetate (20 ml ¡Á 3) extraction, standing liquid, organic phase are respectively 5% of NaHCO3 (20 Ml ¡Á 3), saturated salt water (20 ml ¡Á 3) washing, then drying water-free magnesium sulfate, filtered, reduced pressure to remove the ethyl acetate to get the yellow oily compound IV 83 mg.

20327-23-5, The synthetic route of 20327-23-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Southern Medical University; Chen Jianjun; Cheng Binbin; (22 pag.)CN109456284; (2019); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

109-07-9, 2-Methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 5 1-Cyclopropyl-6,8-difluoro-1,4-dihydro-5-methyl-7-[3-methyl-1-piperazinyl]-4-oxo-3-quinolinecarboxylic acid A suspension of 0.80 g (2.69 mmol) of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-5-methyl-4-oxo-3-quinolinecarboxylic acid, 1.08 g (10.8 mmol) of 2-methylpiperazine, and 20 ml of acetonitrile was refluxed for three hours, then cooled in an ice bath. The precipitate was filtered, washed with water and acetonitrile, and dried to give 0.76 g of the title compound, mp 187-188 C., 109-07-9

As the paragraph descriping shows that 109-07-9 is playing an increasingly important role.

Reference£º
Patent; Warner-Lambert Company; US4920120; (1990); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

59878-57-8,59878-57-8, 1-(Cyclopropylcarbonyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a microwave vial were added methyl 4-((3-methylen-4-oxo-1,2,3,4-tetrahydrocarbazol-9-yl)methyl)benzoate [formula 2-4] (0.10 g, 0.290 mmol), 1-(cyclopropylcarbonyl)piperazine (0.134 g, 0.869 mmol) and toluene (3.0 mL), and a reaction was carried out in a microwave reactor at 120 C. for 90 minutes. Then, the reaction mixture was extracted with ethyl acetate and saturated NH4Cl aqueous solution, the organic layer was washed with brine, dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. Residue was purified by column chromatography (SiO2; dichloromethane/methanol, 10/1) to yield the title compound (0.056 g, 39%).

The synthetic route of 59878-57-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; CHONG KUN DANG PHARMACEUTICAL CORP.; Kim, Yuntae; Lee, Changsik; Yang, Hyun-mo; Choi, Hojin; Min, Jaeki; Kim, Soyoung; Kim, Dal-Hyun; Ha, Nina; Kim, Jung-Min; Lim, Hyojin; Ko, Eunhee; US2014/315889; (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.109-07-9,2-Methylpiperazine,as a common compound, the synthetic route is as follows.

EXAMPLE 24A 3-methyl-1-pyridin-2-ylpiperazine hydrobromide 2-Methylpiperazine (1.0 g, 0.01 mol, racemic mixture) and 2-bromopyridine (10 mL, 0.1 mol) were combined and heated at 120 C. for 16 hours. The reaction mixture was cooled to 23 or and partitioned between ethyl acetate and water. The layers were separated, and the water layer was concentrated under reduced pressure. The residue was triturated with ethyl acetate, dichloromethane, and methanol to afford 460 mg (26% yield) of the title compound as an off-white solid. 1H NMR (300 MHz, DMSO-d6) delta 1.27 (d, J=6.6 Hz, 3H), 2.90 (dd, J=10.5, 14.1 Hz, 1H), 3.10 (m, 2H), 3.40 (m, 2H), 4.32 (m, 2H), 6.77 (dd, J=4.8, 6.9 Hz, 1H), 6.98 (d, J=8.1 Hz, 1H), 7.64 (m, 1H), 8.15 (m, 1H), 8.63 (bs, 1H), 8.92 (bs, 1H); MS (APCI) m/e 178 (M+H)+.

109-07-9, As the paragraph descriping shows that 109-07-9 is playing an increasingly important role.

Reference£º
Patent; Cowart, Marlon D.; Patel, Meena V.; Kolasa, Teodozyi; Brioni, Jorge D.; Rohde, Jeffrey J.; Engstrom, Kenneth M.; Stewart, Andrew O.; Daanen, Jerome F.; Bhatia, Pramila A.; US2004/127504; (2004); 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.59878-57-8,1-(Cyclopropylcarbonyl)piperazine,as a common compound, the synthetic route is as follows.

59878-57-8, Example 2: Alternative synthesis of Compound A using i-fcyclopropylcarbonyl) piperazineMethods (also for Examples 3 & 4)NMR1H NMR spectra were recorded using Bruker DPX 400 spectrometer at 400 MHz. Chemical shifts were reported in parts per million (ppm) on the delta scale relative to tetramethylsilane internal standard. Unless stated otherwise all samples were dissolved in DMSOd6.Mass SpectraMass spectra were recorded on an Agilent XCT ion trap mass spectrometer using tandem mass spectrometry (MS/MS) for structural confirmation. The instrument was operated in a positive ion elctrospray mode.(a) 4-[3-(4-Cyclopropanecarbonyl-piperazine-1-carbonyl)-4-fluoro-benzyl]-2H-phthalazin-1-one (Compound A)2-Fluoro-5-[(4-oxo-3,4-dihydrophthalazin-1-yl)methyl]benzoic acid (D)(15.23g, 51.07 mmol) was suspended with stirring under nitrogen in acetonitrile (96 ml). Diisopropylethylamine (19.6 ml, 112.3 mmol) was added followed by 1-cyclopropylcarbonylpiperazine (l)(9.45g, 61.28 mmol) and acetonitrile (1 ml). The reaction mixture was cooled to 18C. O-Benzotriazol-1-yl- tetramethyluronium hexafluorophosphate (25.18g, 66.39 mmol) was added over 30 minutes and the reaction mixture was stirred for 2 hours at room temperature. The reaction mixture was cooled to 3C and maintained at this temperature for 1 hour, before being filtered. The filter cake was washed with cold (3C) acetonitrile (20 ml) before being dried in vacuo at up to 4O0C to give the title compound as a pale yellow solid (20.21 g).Mass Spectrum: MH+ 4351H NMR (400MHz. DMSO-d6) delta: 0.70 (m, 4H), 1.88 (br s, 1 H), 3.20 (br s, 2H), 3.56 (m, 6H), 4.31 (s, 2H), 7.17 (t, 1 H), 7.34 (dd, 1 H), 7.41 (m, 1 H), 7.77 (dt, 1 H), 7.83 (dt, 1 H), 7.92 (d, 1 H), 8.25 (dd, 1 H), 12.53 (s, 1 H).

As the paragraph descriping shows that 59878-57-8 is playing an increasingly important role.

Reference£º
Patent; KUDOS PHARMACEUTICALS LIMITED; WO2008/47082; (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.52385-79-2,2-(3-Chlorophenyl)piperazine,as a common compound, the synthetic route is as follows.

52385-79-2, Example 300: 3-ri-(ethylsulfonv0-4-piperidinyl1-5-r3-(2-piperazinv0phenv?-1H- indole-7-carboxamide trifluoroacetate; EPO To a solution of 3-[1 -(ethylsulfonyl)-4-piperidinyl]-5-(4,4,5,5-tetramethyl-1 ,3,2- dioxaborolan-2-yl)-1 /-/-indole-7-carboxamide (60 mg, 0.13 mmol) in dioxane (1.5 ml_) and water (0.5 ml_) was added 2-(3-chlorophenyl)piperazine (63.7 mg, 0.325 mmol) and potassium carbonate (90 mg, 0.650 mmol). This mixture was degassed for 5 min then tetrakis(triphenylphosphine)palladium(0) (12 mg, 0.011 mmol) was added. The resulting mixture was reacted in a microwave for 30 min at 160 C. The solid was filtered off and all solvents were evaporated. The resulting solution was re-dissolved in dichloromethane and separator was used to remove water. The mixture was concentrated to give organic solvent and then purified by Gilson Preparatory HPLC to give 21.7 mg of the title compound (27.4%). LC/MS = m/z 496.4 [M+H] Ret. Time: 1.28 min.

The synthetic route of 52385-79-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2007/5534; (2007); A2;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

75336-86-6, (R)-2-Methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,75336-86-6

Example 43.1: 2-((R)-3-Methyl-piperazin-l -yl)-nicotinonitrile. A mixture of (R)-2-methyl piperazine (507 mg, 5.06 mmol), 2-chloro-nicotinonitrile (1.05 g, 7.6 mmol), triethylaniine (2 mL, 14.3 mmol) and tetrahydrofuran (8 mL) was heated at 80¡ã C overnight. The reaction mixture was cooled to room temperature and aqueous saturated sodium bicarbonate (75 mL) was added. The mixture was extracted with dichloromethane (3×200 mL) and the combined organic layer washed with water (75 mL), washed with brine (75 mL), dried over sodium sulfate, filtered and concentrated. The residue was purified on silica gel using dichloromethane: 2M ammonia in methanol (95:5) to give 2- ((R)-3-methyl-piperazin-l-yl)-nicotinonitrile (964 mg, 94 percent). 1H NMR (300 MHz, CDCl3): delta(ppm) 8.34 (dd, IH), 7.77 (dd, IH), 6.74 (m, IH), 4.27 (m, 2H), 3.08 (m, 4H), 2.70 (m, IH), 1.15 (d, 3H).

The synthetic route of 75336-86-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ASTRAZENECA AB; WO2008/112440; (2008); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

4318-42-7, 1-Isopropylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A mixture of 2?chloro?5?nitrobenzaldehyde (2 g, 10.8 mmol), 1?isopropylpiperazine (2.07 g, 16.2 mmol) and potassium carbonate (2.68 g, 19.4 mmol) in DMF (10 mL) was heated at 90 ¡ãC for 4 h. The reaction mixture wascooled to room temperature and diluted with water. The resulting precipitate was collected by filtration, then washed on the filter with water and dried in a vacuum oven to give the title compound (2.8 g, 96percent) . LCMS (Method A) : = 0.49 mi m/z = 278 [M+H].

4318-42-7, 4318-42-7 1-Isopropylpiperazine 78013, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; ALMAC DISCOVERY LIMITED; HARRISON, Timothy; TREVITT, Graham; HEWITT, Peter Robin; O’DOWD, Colin Roderick; BURKAMP, Frank; WILKINSON, Andrew John; SHEPHERD, Steven D.; MIEL, Hugues; WO2015/92431; (2015); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

74879-18-8, (S)-(+)-2-Methylpiperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

In a sealed tube, 2- (2, 8-dimethylimidazo [1 ,2-b]pyridazin-6-yl)-7-fluoro-9-methyl- pyrido[1,2-a]pyrimidin-4-one (Intermediate 4; 50 mg, 0.155 mmol) and (S)-2-methylpiperazine (62 mg, 0.6 19 mmol, 4.0 eq.) were stuffed in DMSO (2 mL) at 125C overnight. The solvent was removed under high vacuum. The residue was taken up in CH2C12 and washed with an aqueoussaturated solution of NaHCO3. The organic layer was separated and dried over Na2SO4 and concentrated in vacuo. The crude was purified by column chromatography (Si02, CH2C12/MeOH=95/5 to 90/10) to afford the title product (45 mg, 72%) as a light yellow solid. MS m/z 404.3 [M+Hi., 74879-18-8

74879-18-8 (S)-(+)-2-Methylpiperazine 2734219, apiperazines compound, is more and more widely used in various fields.

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; ALSENZ, Jochem; GRASSMANN, Olaf; KUEHL, Peter; METZGER, Friedrich; MCCARTHY, Kathleen Dorothy; MORAWSKI VIANNA, Eduardo Paulo; WOODHOUSE, Marvin Lloyd; (130 pag.)WO2017/80967; (2017); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics