Tag: M.W:100-200

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

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

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

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

25137-01-3, (R)-Ethyl piperidine-3-carboxylate is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step E. Ethyl (3JR)-l-[(2-cyclopentyl-2,3,4,5-tetrahydro-lH-pyrido[4,3-6]indol-8- yl)carbonyl]piperidine-3-carboxylateHATU (1.9 g, 5.0 mmol) and ethyl (3?)-piperidine-3-carboxylate (0.67 g, 4.2 mmol) were added to a solution of cyclopentyl-2,3,4,5-tetrahydro-lH-pyrido[4,3-?]indole-8- carboxylic acid (1.1 g, 3.8 mmol) and DIPEA (1.7 niL, 9.6 mmol) in DMF (25 mL). The reaction mixture was stirred for 2 hrs. and was then concentrated. The product was purified by normal-phase MPLC using 2% Et3N, 5% MeOH and 10% acetone in DCM to provide the title compound as colorless oil (1.6 g, 97 %). 1H NMR (400 MHz, CD3OD) ? 1.27 – 1.38 (m, 3 H)3 1.47 – 1.70 (m, 6 H), 1.70 – 1.87 (m, 5 H), 1.94 – 2.18 (m, 3 H), 2.85 – 3.07 (m, 6 H), 3.16 – 3.53 (m, 2 H), 3.75 – 3.88 (m, 2 H), 4.00 – 4.22 (m, 2 H), 7.12 (dd, J=8.30, 1.46 Hz, 1 H), 7.33 (dd, J=8.40, 0.59 Hz, 1 H), 7.48 (s, 1 H); MS (ESI) (M+H)+ 424.0.

25137-01-3, The synthetic route of 25137-01-3 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ASTRAZENECA AB; WO2008/36021; (2008); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

4629-78-1, 3-Methylpiperidin-4-one hydrochloride is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step 2: To a suspension of the product of step 1 in DCM at 0 C., DIPEA (4 eqv) was added slowly and stirred for 30 minutes at 25 C. The reaction mixture was cooled again to 0 C. and acetyl chloride (1.1 eqv) was added slowly. The resulting mixture was stirred at 25 C. for 16 hrs before being quenched by addition of saturated aqueous NaHCO3. The aqueous layer was back extracted three times with DCM. The combined organics were washed with H2O, dried (Na2SO4), filtered and evaporated. The residue was purified by SiO2 flash chromatography to give racemic 1-acetyl-3-methyl-piperidin-4-one (94% over two steps).

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; Bamberg, Joe Timothy; Hermann, Johannes Cornellius; Lemoine, Remy; Soth, Michael; US2010/144745; (2010); 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.

A microwave vial was charged with l-(6-methoxy-5-methylpyridin-3-yl)-4,5,7,8-tetrahydro-lH- oxepino[4,5-c]pyrazol-3-ol (51 mg, 0.185 mmol), (1 -isop ropyl p i per id i n-4-yl)methanol (68 mg, 0.411 mmol) and 2-(tributylphosphoranylidene)acetonitrile (0.143 ml_, 0.547 mmol). The vial was sealed and degassed with nitrogen. Anhydrous toluene (2.5 mL) was added to the reaction mixture which was then heated in a microwave at 120 C for 1 h. The reaction mixture was treated with further (1- isopropylpiperidin-4-yl)methanol (50 mg, 0.302 mmol) and 2-(tributylphosphoranylidene)acetonitrile (0.143 mL, 0.547 mmol) and the reaction mixture was heated at 120 C for 1 h. The reaction mixture was concentrated under a stream of nitrogen and the residue was taken up in water (5 mL) and partitioned with EtOAc (5 mL). The aqueous layer was extracted with further EtOAc (3 x 5 mL) and the combined organic layer wsa passed through a hydrophobic frit and concentrated under reduced pressure. The crude product was purified by MDAP (Method A) to give the title compound (15 mg, 17%). LCMS (Method A) : Rt = 0.66 min, MH+ = 415. 1H NMR (400 MHz, MeOD) delta ppm 8.56 (br. s., 1H), 7.95 (br. s., 1H), 7.51 (br. s., 1H), 4.09 (d, J=5 Hz, 2H), 3.99 (s, 3H), 3.80 (dt, J=15, 5 Hz, 4H), 3.50-3.32 (m, 3H), 2.98 (t, J=12 Hz, 2H), 2.81 (t, J=4 Hz, 2H), 2.74-2.60 (m, 3H), 2.23 (s, 3H), 2.07 (d, J=14 Hz, 2H), 1.81-1.59 (m, 2H), 1.33 (d, J=6 Hz, 6H), 280774-03-0

As the paragraph descriping shows that 280774-03-0 is playing an increasingly important role.

Reference：
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; BAXTER, Andrew; BERTRAND, Sophie Marie; CAMPBELL, Matthew; DOWN, Kenneth David; HAFFNER, Curt Dale; HAMBLIN, Julie Nicole; HENLEY, Zoe Alicia; MILLER, William Henry; TALBOT, Eric Philippe Andre; TAYLOR, Jonathan Andrew; (325 pag.)WO2018/192864; (2018); 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.5810-56-0,4-Acetamidopiperidine,as a common compound, the synthetic route is as follows.,5810-56-0

2.1 b lambda/-[1-(4-{2-[2-Oxo-4-(thiophen-2-ylmethoxy)-2/-/-pyridin-1-yl]-ethyl}-benzyl)-piperidin-4-yl]- acetamide To 45 mg (0.13 mmol) 1-[2-(4-hydroxymethyl-phenyl)-ethyl]-4-(thiophen-2-ylmethoxy)-1 /-/- pyridin-2-one (example 2.1 a) in 3.0 mL DCM is added 55 muL triethylamine (0.40 mmol) and subsequently 20 muL (0.26 mmol) methanesulfonyl chloride at RT. The reaction mixture is stirred 1 h at RT and then 37 mg (0.40 mmol) lambda/-piperidin-4-yl-acetamide is added. The mixture is stirred overnight at RT and is directly added to a reverse HPLC for purification (Zorbax stable bond, C18, 7 mum;water (0.15 % formic acid)/acetonitrile 95:5 to 10:90). Yield: 22 mg (36% of theory) ESI Mass spectrum: [M+H]+ = 466 Retention time HPLC: 2.7 min (method A).

As the paragraph descriping shows that 5810-56-0 is playing an increasingly important role.

Reference：
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; BOEHRINGER INGELHEIM PHARMA GMBH & CO. KG; WO2008/22979; (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.25137-01-3,(R)-Ethyl piperidine-3-carboxylate,as a common compound, the synthetic route is as follows.

A mixture of 2-(3,3-bis(4-(trifluoromethyl)phenyl)-2-propen-1-yloxy)ethanol (25.0 g, 64 mmol) and triethylamine (16.2 g, 0.16 mol) in dry toluene (100 ml) kept under a nitrogen atmosphere was cooled to 10 C. and a solution of methanesulphonyl chloride (14.6 g, 0.13 mol) in dry toluene (100 ml) was added dropwise keeping the temperature below 10 C. When addition was complete the reaction mixture was stirred for 45 minutes at 5 C. and then for 30 minutes at 15 C. Water was added (100 ml) and the mixture was stirred at room temperature for 15 minutes. The phases were separated and the aqueous phase was extracted with two small portions of toluene. The combined organic extracts was washed with brine, dried over sodium sulphate and filtered. To the filtrate was added ethyl (R)-3-piperidine carboxylate (20.1 g, 0.13 mol) and potassium carbonate (22.1 g, 0.16 mol) and the mixture was heated at reflux temperature for 2 days and then stirred at room temperature for 2 days. The reaction mixture was filtered and the solvent evaporated in vacuo to give a residue which was dissolved into a mixture of ethyl acetate (125 ml) and water (75 ml). A 10% citric acid solution was added until pH 4 and the phases were separated. The organic phase was evaporated in vacuo to give a residue which was dissolved in toluene (150 ml). A mixture of a 34% citric acid solution (56 ml) and water (150 ml) was added and the phases were separated. The organic phase was extracted once more with a mixture of a 34% citric acid solution (20 ml) and water (50 ml). To the combined aqueous extracts was added ethyl acetate (150 ml) and excess of a 5% aqueous sodium bicarbonate solution. The phases were separated, the organic phase was dried over sodium sulphate and the solvent evaporated in vacuo to give 21.7 g (64%) of (R)-N-(2-(3,3-bis-(4-(trifluoromethyl)phenyl)-2-propen-1-yloxy)ethyl)-3-piperidinecarboxylic acid ethyl ester as an oil. TLC: rf=0.60 (SiO2; dichloromethane/methanol/acetic acid=20:2:1)., 25137-01-3

25137-01-3 (R)-Ethyl piperidine-3-carboxylate 185582, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; Novo Nordisk A/S; US5198451; (1993); A;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

10338-57-5, 4-(Piperidin-1-yl)benzaldehyde is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

10338-57-5, A mixture [OF 4-HYDRAZINO-1- (3-METHOXYPHENYL)-1 H-PYRAZOLO] [3, 4-d]pyrimidine (Intermediates Example T) (117 mg, 0.457 [MMOL), 4- (1-PIPERIDINYL) BENZALDEHYDE] (114 mg, 0.602 [MMOL),] and [PYRROLIDINE] (2 drops) in [ETOH] (10 mL) was heated at reflux for 12 h. The solid was filtered and washed with hexanes to yield product (195 mg, 98%) as a yellow solid. ‘H NMR (400 MHz, DMSO) 8 12.03 (s, [1 H),] 8.59 (s, 1H), 8.42 (s, [1 H),] 8.16 (s, [1 H),] 7.86- 7.84 (d+s, 2H), 7.62 (d, 2H), 7.45 (t, 1 H), 6.99 (d, 2H), 6.92 (m, [1] H), 3.82 (s, 3H), 3.27 (m, 4H), 1.57 (m, 6H) ppm; ES-MS m/z 428 (MH+).

10338-57-5 4-(Piperidin-1-yl)benzaldehyde 291354, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; SMITHKLINE BEECHAM CORPORATION; WO2004/9602; (2004); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem