Heterocyclic Building Blocks-piperidine

149554-03-0, tert-Butyl 2-(4-oxopiperidin-1-yl)acetate is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To the solution of piperidin-4-one (10 mmol) inTHF (20 mL) was added tert-Butyl bromoacetate (11 mmol), and the mixture was stirredfor 4 h. The mixture was poured to H20 and extracted with EtOAc (3X). The combined organic was washed with brine, dried with Na2504. The solvent was removed under vacuum to afford the crude amineketone, which was used for next step without purification. To the suspension of crude amineketone (1 mmol) in CH2C12 was addedm-CPBA (2 mmol) at 0 C. The mixture was stirred for 8 h at room temp. The aqueous Na2 S203 was added and the mixture was extracted with CH2C12, washed with brine and dried with Na2504. The solvent was removed under vacuum, and the residual was purified with flash column (MeOH : CH2C12 1:4) to give desired lactone (40% for 3 steps).?H NMR (400 MHz, CDC13) 1.47 (s, 9H), 2.52 (t, J = 7.9 Hz, 2H), 2.94 t, J =7.9 Hz, 2H), 3.26 (s, 2H), 3.80 (m, 2H), 4.25 (m, 2H).

149554-03-0, The synthetic route of 149554-03-0 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; UNIVERSITY OF WASHINGTON; JIANG, Shaoyi; BAI, Tao; ELLA-MENYE, Jean-Rene; HUNG, Hsiang-Chieh; JAIN, Priyesh; SINCLAIR, Andrew; SUNDARAM, Harihara Subramanian; LI, Yang; ZHANG, Peng; (98 pag.)WO2017/3639; (2017); A2;,
Piperidine – Wikipedia
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.

General procedure: 3-Formyl-rifamycin SV (RAL)was purchased from LKT Laboratories Inc. (>98%). RAL (250.0mg, 0.34 mmol) was dissolved in 50 ml CH2Cl2 and afterthe addition of catalyst (0.025 mmol HCl/EtOH) respective mixtures wereprepared with each of the following compounds taken separately: 1-adamantylamine,1-methylpiperazine,1-(2-pyridyl)piperazine,1-(4-fluorobenzyl)piperazine,1-(2,4,6-trimethylbenzyl)piperazine, 1-bis(4-fluorophenyl)methylpiperazine, 1-(ethanesulfonyl)piperazine, 1-(methylsulfonyl)piperidin-4-amine, 4-(dimethylamino)-piperidine,1-(4-pyridyl)piperazine, 1-(2-pyrimidyl)piperazinedihydrochloride, 1,9-dimethyl-1,4,9-triazaspiro[5.5]undecanetrihydrochloride, 3,4-dihydro-2H-spiro[isoquinoline-1,4?-piperidine],n-piperidin-4-yl-methanesulfonamide,1-[3-(trifluoromethyl)pyrid-2-yl]piperazine,1-(cyclohexylmethyl)-4-piperidinamine,1,4?-bipiperidine-4-carboxylic acid dihydrochloride, (4-amino-1-piperidinyl)acetic acid dihydrochloride, 2-oxo-2-(1-piperidinyl)ethanamine,1-(2-amino-ethyl)-pyrrolidin-2-one,4-amino-1-Boc-piperidine, 3-amino-2-piperidinonehydrochloride, 1-acetyl-4-aminopiperidine hydrochloride in1 ml of CH3OH. Amines containinghydrochloride were neutralized with an equivalent amount of KOH/EtOH (0.06 mmolor 0.12 mmol or 0.18 mmol) solution. The mixtures were stirred at 40C for halfan hour and after that 3/4 of the solvent volume was distilled off. To thecooled reaction mixture (room temperature) the reductant NaBH3CN (13mg, 0.15 mmol) was added portionwise over 1 min. The reaction mixture wasstirred for one hour. Next the reaction mixture was evaporated to dryness,dissolved in 50 ml of CH2Cl2 and extracted twice with 50ml of water and brine (theses stages were omitted for reactions with1,4?-bipiperidine-4-carboxylic acid dihydrochloride,(4-amino-1-piperidinyl)acetic acid dihydrochloride). The separated organiclayer was evaporated and the synthesized derivatives of 3-formylrifamycin SV(compounds 1-23) were next purified by column chromatography with silicagel (25 cm × 1 cm, silica gel 60, 0.040-0.063 mm/230-400 mesh ASTM, Fluka) withdichloromethane/methanol (from 200:1 to 3:1) as an eluent.

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

Reference：
Article; Pyta, Krystian; Janas, Anna; Szukowska, Monika; Pecyna, Paulina; Jaworska, Marcelina; Gajecka, Marzena; Bartl, Franz; Przybylski, Piotr; European Journal of Medicinal Chemistry; vol. 167; (2019); p. 96 – 104;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2905-56-8,1-Benzylpiperidine,as a common compound, the synthetic route is as follows.

General procedure: To a suspension of 1-(chloromethyl)-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane ditetrafluoroborate (1, 0.975 mmol) in MeCN(3 mL) the amine (2, 0.75 mmol) dissolved in MeCN (3 mL) was added dropwise at r.t. The reaction was stirred at r.t. for another20 min. The solvent was evaporated, and the obtained residuewas purified via flash column chromatography using silica gel as stationary phase. Benzaldehyde (5a) 1H NMR (400 MHz, CDCl3): delta = 10.05 (s, 1 H), 7.89?7.95 (m, 2 H),7.63?7.69 (m, 1 H), 7.54?7.60 (m, 2 H) ppm. 13C NMR (101 MHz,CDCl3): delta = 192.4, 136.5, 134.5, 129.8, 129.0 ppm. IR: nu = 3070(m), 2837 (m), 2678 (w), 1559 (w), 1686 (vs) cm?1., 2905-56-8

2905-56-8 1-Benzylpiperidine 76190, apiperidines compound, is more and more widely used in various fields.

Reference：
Article; Hauser, Anett; Bohlmann, Rolf; Synlett; vol. 27; 12; (2016); p. 1870 – 1872;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

768-66-1, 2,2,6,6-Tetramethylpiperidine is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a dry 100 mL flask, 2,2,6′,6′-tetra-methyl piperidine (0.56 g, 4 mmol) and 6 mL of THF was added and cooled to-78 C. Then n-BuLi (1.5 mL, 2.5M) was added rapidly, and the mixture of LiTMP was stirred for 3 hr., 768-66-1

The synthetic route of 768-66-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Cowart, Marlon D.; Ku, Yi-Yin; Chang, Sou-Jen; Fernando, Dilinie P.; Grieme, Timothy A.; Altenbach, Robert J.; US2004/248899; (2004); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

50607-30-2,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.50607-30-2,Piperidine-2,4-dione,as a common compound, the synthetic route is as follows.

To a round bottom flask charged with 3A (6.06 g, 19.21 mmol), piperidine-2,4-dione (2.391 g, 21.14 mmol), ammonium acetate (5.92 g, 77 mmol) and ethanol (64.0 ml) were added. The reaction mixture was stirred at rt for 2 h. Water (20 ml) was added and stirring was continued for 3 h. The product was collected via filtration. The collected solid was washed with water and dried under vacuum ON, yielding 3B (2.26 g, 9.12mmol, 47.5percent yield) as a white solid. MS(ES+) m/z 248.0 (M+H).

50607-30-2 Piperidine-2,4-dione 10887863, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; BRISTOL-MYERS SQUIBB COMPANY; HART, Amy C.; PITTS, William J.; MASTALERZ, Harold; GUO, Junqing; BROWN, Gregory D.; (148 pag.)WO2016/100166; (2016); 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.768-66-1,2,2,6,6-Tetramethylpiperidine,as a common compound, the synthetic route is as follows.,768-66-1

The 131 mg 2, 2, 6, 6 – tetramethyl hexahydro pyridine plus 1.5 ml anhydrous toluene, cooling to 0 C, dropwise 0.37 ml 2 . 5M BuLi, in canada finishes 0 C to 5 C stirring reaction 30min, then dropwise 1 ml 0 . 9MEt2AlCl (toluene) solution, in canada finishes 0 C to 5 C stirring reaction 40min, then the instillment contains 70 mg (0.232mmol) embodiment 6 compound of 1.5 ml of a toluene solution, canada finishes C – 5 C stirring for 20 hours. TLC display raw material spot disappears, carefully dropwise methanol stopped reaction, adds full and NH4Cl, extraction with ethyl ether, the combined extract, water washing, water-free Na2SO4Drying, filtering, the filtrate is silica gel short column purification, petroleum ether/EtOAc (10/1) elution, to obtain the product 50 mg (71.4%), Rf=0.35 (petroleum ether/EtOAc=4/1).

The synthetic route of 768-66-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Zhejiang Aoxiang Pharmaceutical Co., Ltd.; Zheng Zhiguo; (45 pag.)CN103304375; (2017); B;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

189333-49-1, 3-Benzyl-3,9-diazaspiro[5.5]undecane is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution of Compound 42d (3.67 g, 15 mmol) in tetrahydrofuran (36 mL), water (18 mL), formalin (11 mL, 150 mmol), then formic acid (5.8 mL, 150 mmol) were added and subsequently heating and stirring at 100C for 3 hours. After cooling to room temperature, ethyl acetate was added thereto, and then aqueous 2 N sodium hydroxide solution was added thereto until pH = 10. The organic layer separated was washed with saturated brine, and then dried with anhydrous sodium sulfate. The inorganic substance was removed by filtration. After concentrating in vacuo, the resulting crude product was purified by silica gel column chromatography to yield Compound 42e as a yellow oil.Yield: 3.12 g, (80%)1H-NMR (CDCl3) delta:1.48 (4H, t, J=5.1 Hz), 1.51 (4H, t, J=5.1 Hz), 2.26 (3H, s), 2.36 (4H, t, J=5.7 Hz), 2.38 (4H, t, J=5.7 Hz), 3.49 (2H, s), 7.25-7.31 (5H, m), 189333-49-1

As the paragraph descriping shows that 189333-49-1 is playing an increasingly important role.

Reference：
Patent; Shionogi & Co., Ltd.; HISAKAWA, Shinya; HASEGAWA, Yasushi; AOKI, Toshiaki; KUSANO, Hiroki; SANO, Masayuki; SATO, Jun; YAMAWAKI, Kenji; EP2557082; (2013); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

534595-51-2,534595-51-2, 1-Boc-4-(isopropylamino)piperidine is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a 0 C. solution of tert-butyl 4-(isopropylamino)piperidine-1-carboxylate (1.2 g, 5.19 mmol) in CH2Cl2 (18 mL) was added Et3N (1.44 mL, 10.38 mmol) followed by acetyl chloride (0.55 mL, 7.78 mmol). The resulting solution was stirred for 2.5 hours, then concentrated in vacuo. The material was purified by flash chromatography on silica gel, eluting with 0% to 5% of EtOAc/CH2Cl2, to afford tert-butyl 4-(N-isopropylacetamido)piperidine-1-carboxylate (0.88 g, 59%)

As the paragraph descriping shows that 534595-51-2 is playing an increasingly important role.

Reference：
Patent; RVX Therapeutics Inc.; McLure, Kevin G.; Young, Peter R.; US2013/281399; (2013); 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.280774-03-0,(1-Isopropylpiperidin-4-yl)methanol,as a common compound, the synthetic route is as follows.

Step D: Preparation of (4-Chlorophenyl)-[2-(1-isopropyl-piperidin-4-ylmethoxy)-3-methyl-3H-imidazol-4-yl]-methanone. (1-Isopropyl-piperidin-4-yl)-methanol (0.08 g) in THF (10 mL) was treated with NaH (60% in mineral oil, 0.02 g). After 30 min, the reaction mixture was cooled to 0 C. and the product of Example V, Step C (0.125 g) in THF (5 mL) was added. After stirring overnight, the reaction mixture was partitioned between brine and EtOAc. The organic portion was separated, washed twice with brine, dried over Na2SO4, filtered and concentrated. The residue was purified by column chromatography with silica gel using a gradient elution of 1-4% MeOH in CH2Cl2 to provide (4-Chloro-phenyl)-[2-(1-isopropyl-piperidin-4-ylmethoxy)-3-methyl-3H-imidazol-4-yl]-methanone (0.07, 51 %) as a white solid. M calc=375; M+H found=376. 1H NMR (400 MHz, CDCl3): delta7.66 (d, J=8.3 Hz, 2H), 7.37 (d, J=8.6 Hz, 2H), 7.13 (s, 1H), 4.24 (d, J=6.1Hz, 2H), 3.69 (s, 3H), 2.88 (br d, J=11.0 Hz, 2H), 2.69 (m, 1H), 2.12 (br dd, J=12.6, 9.6 Hz, 2H), 1.88-1.69 (br m, 1H), 1.37 (br dd (J=23.2, 9.3 Hz, 2H), 0.99 (d, J=6.6 Hz, 6H), 280774-03-0

280774-03-0 (1-Isopropylpiperidin-4-yl)methanol 11147855, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; Jones, Todd K.; Mani, Neelakandha; US2005/250948; (2005); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

873779-30-7, tert-Butyl 5-bromo-2-oxospiro[indoline-3,4′-piperidine]-1′-carboxylate is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,873779-30-7

To R8, purchased from ACTIVATE (150 mg, 0.39 mmol) in dichloromethane (3 mL) is added trifluoroacetic acid (0.5 mL) and reaction mixture is stirred for 45 minutes at r.t. The reaction mixture is concentrated. Yield 100%.

As the paragraph descriping shows that 873779-30-7 is playing an increasingly important role.

Reference：
Patent; Boehringer Ingelheim International GmbH; VINTONYAK, Viktor; GRAUERT, Matthias; GRUNDL, Marc; PAUTSCH, Alexander; (64 pag.)US2016/75704; (2016); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem