Day: March 7, 2022

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.35856-62-3,Piperidine-1-sulfonyl chloride,as a common compound, the synthetic route is as follows.

A solution of 0.23 g (1 mmol) of 5-(2,4-dichloro-phenyl)-pyridin-2-ylamine and 0.2 g (1.1 mmol) of piperidine-1-sulfonyl chloride (preparation: Bull. Soc. Chim. Fr.; 1936, p2143) in pyridine (10 ml) was heated to reflux until completion of reaction according to HPLC analysis (20 h). After concentration in vacuo the residue was taken up in EtOAc, which was then washed with 1N aqueous HCl, saturated brine, dried over sodium sulphate and concentrated in vacuo. The residue was applied to a silica gel column with EtOAc/toluene (9/1 to 1/1) as eluent. Combination of the purified fractions and concentration in vacuo gave 0.26 g (67%) of the desired piperidine-1-sulfonic acid [5-(2,4-dichloro-phenyl)-pyridin-2-yl]-amide as a brown crystalline solid. ISN mass spectrum, m/e: 384 (M-1 calculated for C16H17Cl2N2O2S: 384)., 35856-62-3

35856-62-3 Piperidine-1-sulfonyl chloride 11298344, apiperidines compound, is more and more widely used in various fields.

Reference：
Patent; Amrein, Kurt; Hunziker, Daniel; Kuhn, Bernd; Mayweg, Alexander; Neidhart, Werner; US2006/25455; (2006); 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.140645-24-5,(S)-3-(Aminomethyl)-1-N-Boc-piperidine,as a common compound, the synthetic route is as follows.

A solution of (S)-tert-butyl 3-(aminomethyl)piperidine-1-carboxylate (100 mg, 0.5 mmol), 5,7-dichloropyrido[4,3-b]pyrazine (100 mg, 0.5 mmol) and DIPEA (77 mg, 0.6 mmol) in THF (5 mL) was stirred at room temperature for 4 hours. The volatiles were removed under reduced pressure, and the residue was treated with ethyl acetate, with brine, and concentrated to give the crude title compound., 140645-24-5

The synthetic route of 140645-24-5 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; HUTCHISON MEDIPHARMA LIMITED; Su, Wei-Guo; Deng, Wei; Ji, Jianguo; US2014/121200; (2014); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

948894-26-6,948894-26-6, 4-Methylpiperidine-4-carbonitrile hydrochloride is a piperidines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

ii) 4-Methyl-l-[2-(2-phenylethoxy)ethyl]piperidine-4-carbonitrile; A mixture of the product from example 4 step (i) (2-(2~phenylethoxy)ethyl 4- methylbenzenesulfonate) (1.344 g) and the product from step (i) (4-cyano-4- methylpiperidine hydrochloride) (0.569 g) was dissolved in NMP (12 mL) and triethylamine (3 mL) added. The reaction mixture was heated at 85 0C for 3 h then allowed to CQOI and partitioned between EtOAc and water. The layers were separated and the aqueous layer extracted with further EtOAc. The combined organic extracts were washed with saturated aqueous NaHCO3, water, saturated aqueous NaCl, dried (Na2SO4) and concentrated. The residue was diluted with isopropanol then loaded onto a Varian SCX column (50 g). The column was washed with isopropanol then eluted with 1:3 0.880 NH3/isopropanol to afford the sub-title compound as a brown oil which contains ~1 mole equivalent of NMP. Yield: 0.691 g1H NMR (CDCl3) delta 7.30 – 7.19 (m, 5H), 3.66 (t, 2H), 3.57 (t, 2H), 2.91 – 2.87 (m, 4H), 2.61 (t, 2H), 2.35 – 2.30 (m, 2H), 1.89 – 1.85 (m, 2H), 1.58 (td, 2H), 1.37 (s, 3H).

As the paragraph descriping shows that 948894-26-6 is playing an increasingly important role.

Reference：
Patent; ASTRAZENECA AB; WO2007/102771; (2007); A1;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem

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

Step 1: 4-acetyl-1-(benzyloxycarbonyl)piperidine To a stirred solution of 4-acetylpiperidine hydrochloride (22.6 g, 0.138 mol) in saturated aqueous Na2CO3 (100 mL), cooled to 5C, was added benzyl chloroformate (23.6 mL, 0.166 mol) dropwise over 10 – 15 min. The resulting suspension was stirred for 1/2 hour and was filtered. The solid was recrystallized from hexane (200 mL) and ethyl acetate (20 mL) producing 30.5 g of the title compound as a white solid. M.P. 87-89C.

The synthetic route of 89895-06-7 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; MERCK & CO., INC.; EP863757; (2003); 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.189333-49-1,3-Benzyl-3,9-diazaspiro[5.5]undecane,as a common compound, the synthetic route is as follows.

Example 8D (500 mg, 2.05 mmol) and Boc2O (450 mg, 2.06 mmol) in methanol mixture was added triethylamine (311 mg, 3.08 mmol) and the mixture was stirred at 20-30 deg.C for 16 hours. The reaction mixture was concentrated, and the residue was diluted with ethyl acetate (20 mL), and washed with water (15mL × 2) and brine (20 mL) was washed, and the organic layer was dried over anhydrous sodium sulfate, and concentrated. The crude intermediate was dissolved in ethanol (15mL) and acetic acid (2mL), followed by addition of palladium hydroxide / carbon (0.1 g). The mixture was reacted under hydrogen (50Psi) for 20 hours. The mixture was filtered, the filtrate was concentrated to give the acetate salt (320 mg, 1.26 mmol, 61.37% yield) of the title compound., 189333-49-1

Big data shows that 189333-49-1 is playing an increasingly important role.

Reference：
Patent; Nanjing Mingde New Drug Research and Development Co. Ltd.; Qilu Pharmaceutical Co., Ltd.; Ding, Zhaozhong; Zhang, Minghui; Chen, Shuhui; Liu, Xile; Zhu, Yidong; Fan, Chuanwen; Zhao, Baoping; Zhang, Long; Chen, Dong; Yang, Yingying; Zheng, Qingmei; Zheng, Shansong; Wan, Haiwen; Hu, Jinqing; (93 pag.)CN105330698; (2016); A;,
Piperidine – Wikipedia
Piperidine | C5H11N – PubChem