Month: March 2022

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4629-78-1,3-Methylpiperidin-4-one hydrochloride,as a common compound, the synthetic route is as follows.

Preparation of acyl-chloride: A solution of 200 mg (0.571 mmol) of the compound from Example 52A in 4 mL of dichloromethane was initially treated at RT with 249 mu (2.86 mmol) of oxalyl chloride and then with a small drop of DMF.After the reaction mixture had been stirred at RT for 2.5 h, it was concentrated to dryness on a rotary evaporator.The remaining residue was dried under high vacuum and then reacted further in the next substep. Preparation of the amide: The acid chloride obtained above was dissolved in 1 ml of dichloromethane and added to a solution of 171 mg (1.14 mmol) of 3-methylpiperidine-4-one hydrochloride and 398 mu (2.28 mmol) N, N-diisopropylethylamine in 5 ml of dichloromethane dropped.The reaction mixture was stirred at RT for 2 h.After the mixture was concentrated on a rotary evaporator to dryness, the crude product (method 6) was purified by preparative HPLC.After combining the product fractions, evaporation and drying under high vacuum, 236 mg (88% d. Th., 95% purity) of the title compound.

4629-78-1, 4629-78-1 3-Methylpiperidin-4-one hydrochloride 22728864, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; HAERTER, MICHAEL; DELBECK, MARTINA; KALTHOF, BERND; LUSTIG, KLEMENS; LINDNER, NIELS; KAST, RAIMUND; WASNAIRE, PIERRE; SUESSMEIER, FRANK; (372 pag.)TW2016/7950; (2016); A;,
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89895-06-7, 1-(Piperidin-4-yl)ethanone hydrochloride is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,89895-06-7

0224] 1-(Piperidin-4-yl)ethanone hydrochloride(6.07 g, 21.85 mmol) obtained in Preparation Example 6-4 was dissolvedin acetonitrile (75 mL). Potassium carbonate (K2CO3) (5.83 g, 34.96 mmol) and iodoethane (CH3CH2I) (2.77 mL,28.41 mmol) were added dropwise to the resulting solution and the solution was stirred for 18 hrs. The solution wasevaporated under reduced pressure to concentrate, diluted with EtOAc, and washed with water. The washed organicsolvent was dried over anhydrous magnesium sulfate (MgSO4) to concentrate. The resulting residue was isolated andpurified by silica gel column chromatography (dimethylchloride/methanol = 10/1) to give the white title compound (5.18g, 76 %).1H NMR (400 MHz, CDCl3) delta 2.81 (m, 2H), 2.24 (s, 3H), 2.16 (m, 1H), 2.09 (m, 2H), 1.94 (m, 2H), 1.80 (m, 2H), 1.60(m, 2H), 1.48 (m, 3H).

89895-06-7 1-(Piperidin-4-yl)ethanone hydrochloride 44151897, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; Beyondbio Inc.; MIN, Changhee; OH, Byungkyu; KIM, Yongeun; PARK, Changmin; (98 pag.)EP3255042; (2017); A2;,
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Piperidine | C5H11N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.138377-80-7,3-Aminopiperidin-2-one hydrochloride,as a common compound, the synthetic route is as follows.

To a solution of 3-aminopiperidin-2-one hydrochloride (1.50 g) in methanol (10 mL) was added AMBERLYST (registered trademark) A21 (750 mg) at room temperature. The reaction mixture was stirred at room temperature overnight, theinsoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure. To a solution of the residue in ethanol (20 mL) was added 4-thioxothiazolidin-2-one (1.330 g) at room temperature. The reaction mixture wasstirred at room temperature overnight, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (NH, methanol/ethyl acetate) . To a solution of the residue and l-[2,4- bis (trifluoromethyl) benzyl] piperidine-4-carbaldehyde (1018 mg) in 2-propanol (10 mL) was added piperidinium acetate (436 mg) at room temperature. The reaction mixture was stirred at 60°C overnight, and the solvent was evaporated under reducedpressure. The residue was purified by silica gel columnchromatography (NH, methanol/ethyl acetate) and recrystallized from ethyl acetate/diisopropyl ether to give the titlecompound (530 mg) .? NMR (300 MHz, DMSO-d6) delta 1.38-1.59 (2H, m) , 1.68-1.91 (5H, m) , 2.01-2.27 (4H, m) , 2.69-2.84 (2H, m) , 3.17 (2H, brs) , 3.71 (2H, s), 4.43-4.55 (1H, m) , 6.89 (1H, d, J = 8.8 Hz), 7.83 (1H, brs), 7.98 (1H, s) , 8.02-8.12 (2H, m) , 9.34 (1H, brs).MS (ESI+) : [M+H]+ 535.1.

138377-80-7, 138377-80-7 3-Aminopiperidin-2-one hydrochloride 19795138, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; MATSUMOTO, Shigemitsu; ONO, Koji; TOMINARI, Yusuke; KATOH, Taisuke; MIWA, Kazuhiro; HASUOKA, Atsushi; IMAMURA, Shinichi; WO2013/18929; (2013); A1;,
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180307-56-6, tert-Butyl 4-vinylpiperidine-1-carboxylate is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A mixture of 3-brornophenol (1.2 g, 1.0 equiv), N-Boc-4-vinyipiperidine (2.2 g, 1.5 equiv), Pd(OAc)2 (125 mg. 0.08 equiv), and P(o-toi)s (507 mg, 024 equiv) in CFI3CN- Et3N (1:1, 16 mL) was heated at 98 C for 16 h in a sealed vial. After cooling to room temperature, the volatiles were removed in vacuo. To the residue, DCM was added, washed with water, brine, dried over Na2SO4, filtered, and concentrated. The crude product was purified by column chromatography on silica gel with MeOH/DCM (0-5%) as an eluent to give 2.0 g (95%) of intermediate M as a yellow oil.

180307-56-6, 180307-56-6 tert-Butyl 4-vinylpiperidine-1-carboxylate 10910832, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; ATHENEX, INC.; SMOLINSKI, Michael P.; URGAONKAR, Sameer; CLEMENTS, James Lindsay; HANGAUER, David G., JR.; (149 pag.)WO2018/170225; (2018); A1;,
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19099-93-5, 1-Cbz-Piperidin-4-one is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

n-Butyllithium is added dropwise to a solution at -20 C. of N,N,N’,N’-tetramethylethylenediamine in tetrahydrofuran. After stirring for thirty minutes, the mixture is cooled to -78 C. and a solution of (6-chloro-pyridin-2-yl)-tert-butyl carbamate in tetrahydrofuran is added. The reaction is maintained at -50 C. for two hours and then a solution of 4-oxo-piperidine-1-benzyl carboxylate in tetrahydrofuran is added dropwise. The reaction mixture is brought back to room temperature slowly and then heated at 40 C. for 18 hours. The reaction mixture is hydrolysed with a saturated aqueous solution of sodium hydrogen carbonate and then diluted with dichloromethane. The product is extracted with dichloromethane, the organic phases are combined, washed once with water and then dried over magnesium sulphate, filtered and concentrated under vacuum. The crude product is chromatographed on silica gel eluted with a heptane/ethyl acetate mixture, 70/30 and then 50/50. 7′-chloro-2′-oxo-1′,2′-dihydro-1H-spiro[piperidine-4,4′-pyrido[2,3-d][1,3]oxazine]-1-benzyl carboxylate is obtained in the form of a yellow solid.

19099-93-5, As the paragraph descriping shows that 19099-93-5 is playing an increasingly important role.

Reference：
Patent; GALDERMA RESEARCH & DEVELOPMENT; Fournier, Jean-Francois; Clary, Laurence; Thoreau, Etienne; (164 pag.)US2018/50992; (2018); A1;,
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Piperidine | C5H11N – PubChem

53617-36-0, 1-Methyl-4-(piperidin-4-yl)piperazine is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

53617-36-0, (Example 20) N-(3-Fluoro-4-{[2-({[2-(4-methylpiperazin-1-yl)piperidin-1-yl]carbonyl}amino)pyridin-4-yl]oxy}phenyl)-N’-(4-fluorophenyl)clopropane-1,1-dicarboxamide To a solution of [4-(2-fluoro-4-{[1-(4-fluorophenylcarbamoyl)cyclopropanecarbonyl]amino}phenoxy)pyridin-2-yl]-N-(phenoxycarbonyl)carbamic acid phenyl ester (66 mg) in N,N-dimethylformamide (1.0 ml) was added 1-methyl-4-(piperidin-4-yl)piperazine (73.3 mg) at room temperature, followed by stirring overnight. The reaction mixture was partitioned between ethyl acetate and water. The organic layer was washed with a saturated aqueous solution of ammonium chloride and brine in this order, and dried over anhydrous sodium sulfate. The solvent was concentrated under reduced pressure. The resultant residue was purified by silica gel column chromatography (Fuji Silysia NH, eluent; ethyl acetate, then ethyl acetate:methanol = 95:5). Fractions containing the target compound were concentrated under reduced pressure. A solid was precipitated by addition of diethyl ether:heptane = 1:3 to the resultant residue. The solvent was removed under reduced pressure. The solid residue was dried under reduced pressure to provide the titled compound as white powder (60.1 mg, 95 percent). 1H-NMR Spectrum (CDCl3) delta (ppm): 1.40-2.00 (9H, m), 2.29 (3H, s), 2.35-2.70 (8H, m), 2.88 (2H, m), 4.00-4.10 (2H, m), 6.56 (1H, dd, J = 2.4, 5.6 Hz), 7.00-7.30 (5H, m), 7.40-7.50 (2H, m), 7.56 (1H, d, J = 2.4 Hz), 7.68 (1H, dd, J = 2.4, 12.0 Hz), 8.05 (1H, d, J = 5.6 Hz), 8.63 (1H, brs), 9.54 (1H, brs). ESI-MS (m/z): 656 [M+Na]+.

53617-36-0 1-Methyl-4-(piperidin-4-yl)piperazine 795707, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; Eisai R&D Management Co., Ltd.; EP1889836; (2008); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.885279-92-5,1-Boc-1,8-diaza-spiro[4.5]decane,as a common compound, the synthetic route is as follows.

885279-92-5, EXAMPLE 18; N-(4-aminobiphenyl-3-yl)-4-(1,8-diazaspiro[4.5]dec-8-ylcarbonyl)benzamide; To a solution of stirring terephthaloyl chloride (50 mg, 0.246 mmol) in 3 mL dichloromethane was added tert-butyl (3-aminobiphenyl-4-yl)carbamate (70 mg, 0.246 mmol) slowly over a period of 10 minutes, followed by the addition of diisopropylethylamine (43 muL, 0.246 mmol). The reaction mixture was allowed to stir for 30 min. at room temperature. Tert-butyl 1,8-diazaspiro[4,5]decane-1-carboxylate (59 mg, 0.246 mmol) was then added, followed by the addition of diisopropylethylamine (43 muL, 0.246 mmol). The reaction mixture was allowed to stir for 1 hour at room temperature. The reaction mixture became cloudy. Argonaut MP-Carbonate scavenging resin (255 mg, 0.738 mmol) was then added and stirred overnight at room temperature. The mixture was then fully dissolved by adding 3 mL dimethylformamide, filtered from scavenging resin, and concentrated. Added dichloromethane (1 mL) and stirred to form suspension, then treated with trifluoroacetic acid (1 mL). The reaction mixture was concentrated after 2 hours of stirring at room temperature and the crude residue was purified by reverse-phase chromatography (5-75-95% acetonitrile/water with 0.1% formic acid). The appropriate fractions were combined and lyophilized. MS (ESI+): cal’d [M+H]+455.2, obs’d 455.1.

885279-92-5 1-Boc-1,8-diaza-spiro[4.5]decane 34178602, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; Berk, Scott C.; Close, Joshua; Hamblett, Christopher; Heidebrecht, Richard W.; Kattar, Solomon D.; Kliman, Laura T.; Mampreian, Dawn M.; Methot, Joey L.; Miller, Thomas; Sloman, David L.; Stanton, Matthew G.; Tempest, Paul; Zabierek, Anna A.; US2007/117824; (2007); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

19099-93-5, 1-Cbz-Piperidin-4-one is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step 2: benzyl 7′-chloro-2′-oxo-1′,2′-dihydrospiro[piperidine-4,4′-pyrido[2,3d]-[1,3]oxazine]-1-carboxylate Under a nitrogen atmosphere 26 mL (173.39 mmol) N,N,N,N-tetramethylenethylene-diamine in 180 mL THF were cooled to -20 C. and within 10 min 70 mL (175 mmol) of a 2.5 molar butyllithium solution were added. After 30 minutes’ stirring the reaction mixture was cooled to -78 C. and at this temperature 17.84 g (78.00 mmol) tert-butyl (6-chloro-pyridin-2-yl)-carbamate in 120 mL THF were added dropwise within 20 min. The reaction mixture was stirred for 2.5 h at -78 C. and then combined with 27.22 g (116.70 mmol) Z-piperidone in 60 mL THF within 10 min. After a further hour’s stirring at -78 C. the reaction mixture was first of all heated to RT and then stirred for 18 h at 40 C. Then the reaction mixture was decomposed by the dropwise addition of 150 mL saturated sodium hydrogen carbonate solution. Then the reaction mixture was extracted several times extracted with DCM. The combined organic phases were washed with water, dried and evaporated down. The residue was triturated with PE/EtOAc 1/1, the precipitate formed was suction filtered, washed with PE/ETOAc 1/1 and dried.Yield: 16.40 g (54% of theoretical)ESI-MS: m/z=388 (M+H)+ Rt(HPLC): 1.57 min (method C), 19099-93-5

19099-93-5 1-Cbz-Piperidin-4-one 643496, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; US2012/149698; (2012); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.32188-75-3,5-Nitro-2-(piperidin-1-yl)benzonitrile,as a common compound, the synthetic route is as follows.

The compound 5-nitro-2- (piperidin-1-yl) benzoic acid was subjected to reduction reaction by NaBH4 for 30 min, followed by 2.0 g of a yellow solid (Compound 11), 32188-75-3

32188-75-3 5-Nitro-2-(piperidin-1-yl)benzonitrile 4811199, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; Chinese Academy Of Sciences Shanghai Pharmaceutical Institute; Long Yaqiu; Xu Zhongliang; Wang Heyao; Cai Mengxin; (31 pag.)CN106892871; (2017); A;,
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Piperidine | C5H11N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1075-89-4,8-Azaspiro[4.5]decane-7,9-dione,as a common compound, the synthetic route is as follows.

EXAMPLE 40 3-Aza-spiro[5.5]undecane Was prepared from (3,3-tetramethylenglutarimide by lithium aluminium hydride reduction in tetrahydrofurane under standard conditions. Flash chromatography (silica, eluent dichloromethane/methanol/triethylamine 10:2:0.1) afforded the title compound as colorless oil (94% yield). MS 140(M+H+).

1075-89-4, The synthetic route of 1075-89-4 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Flohr, Alexander; Jakob-Roetne, Roland; Norcross, Roger D.; Riemer, Claus; US2003/149036; (2003); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem