Month: April 2021

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.109-01-3,1-Methylpiperazine,as a common compound, the synthetic route is as follows.

STARTING MATERIAL SYNTHETIC EXAMPLE 8 5-amino-2-(4-methylpiperazin-1-yl)benzonitrile By the reaction and treatment in the same manner as in Starting Material Synthetic Example 4 using 2-chloro-5-nitrobenzonitrile (15 g) and methylpiperazine (9.8 g), the title compound (11.1 g) was obtained. melting point: 45-46¡ã C., 109-01-3

The synthetic route of 109-01-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Ushio, Hiroyuki; Naito, Youichiro; Sugiyama, Naoki; Kawaguchi, Takafumi; Ohtsuki, Makio; Chiba, Kenji; US2003/203909; (2003); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

118753-66-5, tert-Butyl 4-aminopiperazine-1-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a stirred solution of 6-chloro-2-naphthoic acid (0.100 g, 0.48 mmol, 1.0 equiv) in DMF (05 mL) was added HATU (0.368 g, 0.97 mmol, 2.0 equiv) at RT and stirred for 10 minutes. Then tert-butyl 4-aminopiperazine- 1 -carboxylale (0.097 g, 0.48 mmol, 1.0 equiv) was added followed by the addition of DIPEA (0.2 mL, 1.45 mmol, 3.0 equiv). The resulting reaction mixture was allowed to stir at RT for overnight. Product formation was confirmed by LCMS. the reaction mixture was diluted with water (50 mL) and extracted with EtOAc (50 mL c 2). The combined organic layer was washed with water (30mL), brine solution (30 mL >< 2), dried over anhydrous sodium sulfate and concentrated under reduced pressure, to obtain tert-butyl 4~(6- chloro-2-naphtliamido)piperazine-l -carboxylale (0.160 g, 85 % Yield) as an off-white solid. LCMS 390.2 [M+H]+: NMR (400MHz, DMSO-de) d 9.69 (s, 1 H), 8.39 (s, 1 H), 8.18 - 8.03 (m, 2 H), 7.97 (t, ./= 9.0 Hz, 1 H), 7.90 (d, ./= 8.8 Hz, 1 H), 7.60 (d, J 7.0 Hz, 2 H), 3 44 (br. s., 3 H), 2.94 - 2.84 (m, 4 H), 1 .53 - 1.32 (m, 9 H)., 118753-66-5

As the paragraph descriping shows that 118753-66-5 is playing an increasingly important role.

Reference£º
Patent; PRAXIS BIOTECH LLC; DELGADO OYARZO, Luz Marina; URETA DIAZ, Gonzalo Andres; PUJALA, Brahmam; PANPATIL, Dayanand; BERNALES, Sebastian; CHAKRAVARTY, Sarvajit; (0 pag.)WO2019/236710; (2019); 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.55112-42-0,4-Methyl-1-piperazinecarbonyl Chloride Hydrochloride,as a common compound, the synthetic route is as follows.

Example-4; Preparation of o-CS-chloropyridin-Z-ylJ-S^-methylpiperazin-l-ylJ-carbonyloxy -7- oxo-5,6-dihydropy rrolo- [3,4-b] -pyrazine (Zopiclone).Mixture of 400 ml dichloromethane, 100 ml dimethyl formamide, 6-(5-chloropyridin-2- yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo-[3,4-b]-pyrazine (10Og) and N-methyl piperazine carbomoyl chloride hydrochloride (106.Ig) was cooled to 10-15 C. Calcium oxide (42.66g) and dimethyl amino pyridine (2.5g) were added to the mixture. Reaction mixture was warmed to 25-30 C and stirred till completion of reaction. After completion of reaction, mixture was filtered and washed with 400 ml dichloromethane. The dichloromethane layer was concentrated at atmospheric pressure till dryness. 400 ml of methanol was added to residual solid and stirred for 60 min at 25-30 C. Slurry was cooled to 0-5 C and stirred for 60 min at same temperature. Solid was filtered, washed with chilled methanol 2X25 ml and dried at 50-60 C to obtain 126 g of racemic Zopiclone, 55112-42-0

As the paragraph descriping shows that 55112-42-0 is playing an increasingly important role.

Reference£º
Patent; MATRIX LABORATORIES LTD; WO2008/126105; (2008); 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, In a nitrogen atmosphere, 115 mL of di-tert-butyl dicarbonate was dropwise added to chloroform (500 mL) solution of 50.0 g of (R)-2-methylpiperazine, over 1 hour. The reaction liquid was washed with water, and dried with anhydrous magnesium sulfate. The solvent was evaporated off under reduced pressure, and the residue was separated and purified through silica gel column chromatography (hexane/ethyl acetate = 2/1) to obtain 63.5 g of the entitled compound as a colorless oily substance.

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

Reference£º
Patent; BANYU PHARMACEUTICAL CO., LTD.; EP1726590; (2006); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

115761-79-0, 1-(2,4-Difluorophenyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A mixture of 2- (5-amino-2- (furan-2-yl) -7H-pyrazolo [4, 3-e] [1, 2, 4] triazolo [1, 5-c] pyrimidin-7-yl) -2-phenylpropanoic acid (50 mg, 0.13 mmol) , 1- (2, 4-difluorophenyl) piperazine (25 mg, 0.13 mmol) , HATU (59 mg, 0.16 mmol) and DIEA (33 mg, 0.26 mmol) in DMF (5 mL) was stirred at rt for 2 hrs. The solution was added with water (10 mL) , extracted with ethyl acetate (10 mL) and washed with brine (10 mL) . The organic layer was dried, concentrated and purified by column chromatography (PE: EA = 2: 1) and preparative TLC (DCM: MeOH = 20: 1) to get the desired product (20 mg, 28%) .1H NMR (400 MHz, DMSO-d6) delta 8.31 (s, 1H) , 8.08 (br. s, 2H) , 7.95 (d, J = 4.0Hz, 1H) , 7.30-7.11 (m, 7H) , 6.92-6.86 (m, 2H) , 6.74 (d, J = 4.0Hz, 1H) , 3.71 (br. s, 2H) , 3.45-3.40 (m, 2H) , 3.16-2.90 (m, 4H) , 2.35 (s, 3H) ppm. MS: M/e 570 (M+1)+

115761-79-0, The synthetic route of 115761-79-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; BEIGENE, LTD.; ZHANG, Guoliang; SUN, Hanzi; ZHOU, Changyou; (253 pag.)WO2020/20097; (2020); 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

The 5 – ((2,4-dioxo -3,4-dihydrochinazolines having antiviral properties -1 (2H)-yl) methyl) – 2-fluoro-benzoic acid (50 mg, 0 . 16mmol), EDCI (62 mg, 0 . 32mmol), HOBT (44 mg, 0 . 32mmol) and TEA (33 mg, 0 . 32mmol) into the reaction bottle in, addition of about 2 ml of the dissolution of water-free DMF, r.t. The lower stirring 60 min, then dropwise (2S, 6R) – 2,6-dimethyl piperazine (28 mg, 0 . 24mmol) in the DMF solution to the reaction solution, r.t. The lower stirring overnight, the reaction solution is poured into 100 ml water, using 100mLDCM extraction, an organic layer for sequentially 1MHCl (100 ml), saturated NaCl (100 ml) and water (100 ml) washing, concentrating under reduced pressure, column chromatography, to obtain 40 mg solid, yield 61.3percent.

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

Reference£º
Patent; Institute Of Materia Medica Chinese Academy Of Medical Sciences; Xu, Bailing; Chen, Xiaoguang; Yao, Haiping; Ji, Ming; Jin, Jing; Zhou, Jie; Wang, Ke; Zhao, Dalong; (55 pag.)CN105461697; (2016); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

954388-33-1, (R)-1-((Benzyloxy)carbonyl)-4-(tert-butoxycarbonyl)piperazine-2-carboxylic acid is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,954388-33-1

(a) [2S]-1-Benzyloxycarbonyl-4-t-butoxycarbonyl-2-methoxycarbonylmethylpiperazine A solution of of [2R]-1-benzyloxycarbonyl-4-t-butoxycarbonylpiperazine-2-carboxylic acid (prepared as in Example 1(b) and 2(a)) (4.7g) in ethyl acetate (70ml) containing N-methylmorpholine (1.76ml) at 0C was treated with isobutyl chloroformate (2.37ml) for 3 hours and the solution was filtered and added to an excess of diazomethane and left at room temperature for 18 hours.. It was evaporated to dryness to afford the diazoketone, which was dissolved in dry methanol (120ml) and treated with silver benzoate (1.99g) in triethylamine (19.9ml), with cooling in ice.. The solution was stirred in the dark at room temperature for 18 hours, evaporated to dryness, dissolved in ethyl acetate, washed with sodium bicarbonate solution and dried over sodium sulfate.. It was chromatographed on silica gel, eluding with ethyl acetate-hexane to afford an oil (3.15g) (94% ee by chiral HPLC).

The synthetic route of 954388-33-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; SmithKline Beecham plc; EP1187828; (2004); B1;,
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 solution of (3 ?)-3-methyl-6-(2- methyloxiran-2-yl)-3,4-dihydro-lH-isochromen-l-one (598 mg, 2.74 mmol) and tert-butyl (35)- 3 -(hydroxymethyl)piperazine-l -carboxylate (770 mg, 3.56 mmol dissolved in EtOH (15mL) was heated in a sealed tube to 110C for 14 hours. The reaction was cooled and concentrated to give crude product which was purified via MPLC (30-80%) EtOAc/Hexane) to give the title compound as a mixture of diastereomers: LC-MS: (M+l)+ 435;, 314741-40-7

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

Reference£º
Patent; MERCK SHARP & DOHME CORP.; PIO, Barbara; PASTERNAK, Alexander; SHAHRIPOUR, Aurash; TANG, Haifeng; WALSH, Shawn; WO2013/90271; (2013); 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.162046-66-4,4-(4-(tert-Butoxycarbonyl)piperazin-1-yl)benzoic acid,as a common compound, the synthetic route is as follows.

4- (4- (tert-Butoxycarbonyl) pirhoerazin-1-yl) benzoic acid (10 g, 32.64 mmol) was dissolved in anhydrous THF (200 mL) under nitrogen at O0C and BH3. THF (IM in THF, 65.3 mL, 65.3 mmol) was added over 15 min. The reaction was EPO maintained at this temperature and after 3 h a further portion of BH3-THF (IM in THF, 10 mL, 10 itimol) was added. After 2 h, MeOH (30 mL) was added and the reaction was warmed to rt. The reaction mixture was partitioned between EtOAc (150 mL) and brine (200 mL) . The aqueous layer was re-extracted with EtOAc (100 ruL) and the combined organics were washed with a saturated aqueous solution of NaHCXb (150 mL) and then dried (MgSO/j) and filtered. On concentration of the solution the title compound (8.57 g, 90%) precipitated as a white solid and was collected by filtration. 1H NMR (CDCl3) 1.51 (9H, s), 8.14 (4H, t) , 3.62 (4H, t) , 4.62 (2H, d) , 6.94 (2H, d) , 7.31 (2H, d) .

162046-66-4, The synthetic route of 162046-66-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; VERTEX PHARMACEUTICALS INCORPORATED; WO2007/27528; (2007); 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.169447-70-5,(S)-tert-Butyl 2-methylpiperazine-1-carboxylate,as a common compound, the synthetic route is as follows.

Add to the reaction flask6-bromo-3-aldehyde pyridine (2.43 g, 13 mmol) and(S) -2-methylpiperazine-1-carboxylic acid tert-butyl ester(2) (3.4 g, 17 mmol) and dichloromethane (30 mL)Sodium triacetoxyborohydride (4.3 g, 20 mmol) was added in portions.The mixture was stirred at room temperature for 12 hours, water (10 mL) was added,Dichloromethane extraction (20 mL x 3).The organic phase was washed with saturated Na2CO3 solution (40 mL)Saturated brine (40 mL), dried over anhydrous sodium sulfate, filtered,Concentrated under reduced pressure. The residue was purified by column chromatography (DCM / MeOH = 20: 1)The resulting residue was purified to give the title compound (2.2 g, white solid)Yield 45%., 169447-70-5

As the paragraph descriping shows that 169447-70-5 is playing an increasingly important role.

Reference£º
Patent; Gan & Lee Pharmaceuticals; Liu, Wenjian; Yin, Lei; Li, Heng; (94 pag.)CN106608879; (2017); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics