Category: 20845-34-5

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.20845-34-5,1-Methyl-2-piperidinemethanol,as a common compound, the synthetic route is as follows.

EXAMPLE 26 3-((1-methyl-2-piperidinyl)methoxy)pyridine oxalate salt 1-Methyl-2-piperidinemethanol (0.857 g, 6.65 mmol) was allowed to react with 3-bromopyridine (0.67 mL, 6.98), cuprous bromide (0.257 g, 1.33 mmol), triphenylphosphine (0.698 g, 2.66 mmol) and potassium carbonate (0.919 g, 6.65 mmol). The reaction mixture was heated to 90¡ã C. and stirred for 120 hr, then cooled to 25¡ã C., acidified with HCl (1.5 M; 35 mL) and washed with ethyl acetate (4*50 mL). The aqueous layer was basified with saturated aqueous potassium carbonate, and the product was extracted with chloroform (6*100 mL), dried (MgSO4) and concentrated in vacuo to an oil. The crude product was purified to yield the free base of the title compound after chromatography on silica gel (CHCl3 /MeOH/NH4 OH 1500:30:3). The amine was dissolved in EtOH (1 mL) and treated with oxalic acid (ca. 65 mg) to yield after recrystallization (EtOH/Et2 O) the title compound (0.088 g, 4percent) as a hygroscopic white solid. MS (DCI/NH3) m/e: 207 (M+H)+. 1 H NMR (D2 O, 300 MHz) delta: 8.46 (d, J=2.9 Hz, 1H), 8.37 (dd, J=5.2, 1.1 Hz, 1H), 7.94 (ddd, J=8.8, 2.9, 1.1 Hz, 1H), 7.80 (dd, J=8.8, 5.9 Hz, 1H), 4.69 (dd, J=11.2, 3.1 Hz, 1H), 4.35 (dd, J=11.2, 2.0 Hz, 1H), 3.56 (m, 2H), 3.18 (dt, J=12.7, 3.0 Hz, 1H), 2.93 (s, 3H), 2.05-1.65 (m, 6H). Anal. calcd for C14 H20 N2 O5.0.4 C2 H2 O4: C, 53.49; H, 6.31; N, 8.43. Found: C, 53.39; H, 6.09; N, 8.19., 20845-34-5

As the paragraph descriping shows that 20845-34-5 is playing an increasingly important role.

Reference£º
Patent; Abbott Laboratories; US5948793; (1999); A;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

20845-34-5, 1-Methyl-2-piperidinemethanol is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 10 [00349] Step 1 [00350] Acetic acid 4-chlorocarbonyl-phenyl ester. A solution of 4-acetoxybenzoic acid (200 mg, 1.11 mmol), thionyl chloride(1.6 mL), 1 drop of DMF, and 7.5 mL of chlorobenzene was heated to 80¡ã C. for 1.5 hrs. The reaction was then cooled to room temperature and the solvent and excess thionyl chloride were removed in vacuo. Theoretical yield of the title compound was assumed and the residue was used as is. [00351] Step 2 [00352] Methanesulfonic acid 4-[3-(4-hydroxy-benzoyl)-6-methanesulfonyloxy -benzo[b]thiophen-2-yl]-phenyl ester. To a solution of methanesulfonic acid 4-(6-methanesulfonyloxy-benzo[b]thiophen-2-yl)-phenyl ester1(200 mg, 0.5 mmol) in 14 mL of methylene chloride was added the product from Step 1, Example 10 (104 mg, 0.53 mmol) and triflic acid (0.47 mL, 5.3 mmol). The reaction was stirred at reflux for 16 hrs, cooled to room temperature, and poured into saturated sodium bicarbonate solution and was extracted into methylene chloride. The organic layer was dried over anhydrous magnesium sulfate, filtered, and concentrated. The residue was purified by silica gel chromatography using 20percent Ethyl acetate/ Hexanes to 50percent Ethyl acetate/Hexanes as the gradient eluant to obtain 125 mg of the title compound. [00353] Step 3 [00354] Methanesulfonic acid 4-{6-methanesulfonloxy-3-[4-(1-methyl-piperidin-2-ylmethoxy)-benzoyl]-benzo[b]thiophen-2-yl}-phenyl ester. A solution of the product from Step 2, Example 10 (115 mg, 0.22 mmol), (1-methyl-piperidin-2-yl)-methanol (28.7 mg, 0.22 mmol), and triphenylphosphine (75 mg, 0.29 mmol) in 3 mL of THF was cooled to 0¡ã C. and diethyl azodicarboxylate (0.051 mL, 0.26 mmol) was added dropwise. After the addition was complete, the reaction was allowed to warm to room temperature and was stirred for 16 hrs. The THF was evaporated off and the residue was chromatographed on silica gel using 1percent MeOH-1percent Diethylamine-methylene chloride as the eluant to give 80 mg of the title compound. [00355] Step 4 [00356] [6-Hydroxy-2-(4-hydroxy-phenyl)-benzo[b]thiophen-3-yl]-[4-(1-methyl -piperidin-3-ylmethoxy)-phenyl]-methanone. A solution of the product from Step 3, Example 10 (80 mg, 0.13 mmol) and 0.25 mL of 5N NaOH in 8 ml of ethanol was heated to reflux for 1 hr. The solvent was evaporated and the residue was diluted with water. The reaction was acidified with 3N HCl then made basic with saturated sodium bicarbonate solution. This aqueous solution was extracted with 1:2 MeOH/ methylene chloride. The combined organic layers were dried over anhydrous magnesium sulfate, filtered, and concentrated. The crude product was chromatographed on silica gel using 5percent MeOH/CHCl3 to 10percent MeOH/CHCl3 as the gradient eluant to obtain the title compound. [00357] 1H NMR (MeOH-d4) delta7.70(d, 2H), 7.40(d, 1H), 7.25(d, 1H), 7.15(d, 2H), 6.85(m, 3H), 6.60(d, 2H), 4.05(m, 2H), 2.95(m, 1H), 2.35(s, 3H), 2.30(m, 2H), 1.65(m, 6H)., 20845-34-5

The synthetic route of 20845-34-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Pfizer Inc.; US6756388; (2004); B1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.20845-34-5,1-Methyl-2-piperidinemethanol,as a common compound, the synthetic route is as follows.

1-Methyl-2-piperidinemethanol (0.261 g, 2.02 mmol) was dissolved in 1,2-dimethoxyethane (6.00 mL), and the solution was mixed with a solution of n-butyllithium in hexane (1.60 mol/L, 1.30 mL, 2.08 mmol) added dropwise under ice-cooling. After stirring for fifteen minutes, the reaction mixture was mixed with 2-chloro-4-(2,4-dichlorobenzylamino)-6-(cyclopropylcarbonyl) -5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine prepared according to Process Steps 1 and 2 of Example 1 (0.205 g, 0.498 mmol), followed by stirring at 100¡ã C for three days. After checking the completion of the reaction by thin layer chromatography, the reaction mixture was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate_triethylamine=10:1) and thereby yielded Compound 3-27 (0.190 g, 76percent).

As the paragraph descriping shows that 20845-34-5 is playing an increasingly important role.

Reference£º
Patent; KYOWA HAKKO KOGYO CO., LTD.; EP1552842; (2005); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem