Tag: M.W:100-200

185815-59-2, 4-Isobutyldihydro-2H-pyran-2,6(3H)-dione is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,185815-59-2

Example 5: Preparation of CSRVS-methyl-S-^-oxo^irdRVl-phenylethyllammolethyl) hexanoic acid compound (24); [0079] A three-necked flask equipped with an addition funnel, thermometer pocket, drying tube and a mechanical stirrer, was charged with methylene chloride (100 ml), (R)-(+)- phenylethylamine (53.38 g, 0.44 mole) and 4-dimethylaminopyridine (0.18 g, 0.00147 mole). The mixture was cooled to a temperature of 0-5C, followed by addition of a solution of 3-isobutyl glutaric anhydride (25 g, 0.147 mole) in methylene chloride (25 ml), over a period of 15-20 minutes, and stirring for additional 1.5-2 hours, at a temperature of 0-5C. The mixture was then extracted with 2.5-3 percent aqueous solution OfNaHCO3 solution (500 ml), and diluted with water (1000 ml) followed by washing the aqueous phase with toluene (1 x 100 ml and 1 x 50 ml). The pH of the aqueous phase was adjusted to 2-2.5 by adding a 1- 12N solution Of hydrochloric acid. The aqueous phase was further extracted with ethyl acetate (1 x 150 ml and 1 x 50 ml), followed by drying the combined ethyl acetates extracts over anhydrous sodium sulfate, and stripping off the solvents, to obtain a residue. The residue was crystallized from ethyl acetate and toluene mixture to get 26.2 g (61.3 percent yield) of a white solid of (3R)-5-methyl-3-(2-oxo-2-{[(lR)-l- phenylethyl]amino}ethyl)hexanoic acid with an optical purity of 99.41 percent, as measured by chiral HPLC.

As the paragraph descriping shows that 185815-59-2 is playing an increasingly important role.

Reference£º
Patent; TEVA PHARMACEUTICAL INDUSTRIES LTD.; TEVA PHARMACEUTICALS USA, INC.; WO2007/35789; (2007); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.720706-20-7,(4-Amino-4-tetrahydropyranyl)methanol,as a common compound, the synthetic route is as follows.

PREPARATION 9l-r(4-methylphenyl)sulfonyl]-6-oxa-l-azaspiror2.51octaneA solution of 4-aminotetrahydro-2H-pyran-4-methanol (16 g, 122 mmol) in dichloromethane (700 mL) was treated with triethylamine (85 mL, 610 mmol), p-toluenesulfonyl chloride (69.8 g, 366mmol) and DMAP (1490 mg, 12.2 mmol) under nitrogen. After approximately 18 hours at room temperature, the reaction was filtered through a pad of silica gel. The filtrate was concentrated in vacuo then purified by chromatography on silica gel (5-20% EtOAc/hexane) to afford intermediate the title compound (12.5g) as a white solid.1H NMR (CDCl3, 500 MHz, ppm) delta 1.92 (m, 2H), 2.08 (m, 2H), 2.47 (s, 3H), 2.52 (s, 2H), 3.76 (m, 2H), 3.99 (m, 2H), 7.35 (d, J=8.0 Hz, 2H), 7.86 (d, J=8.5 Hz, 2H)., 720706-20-7

720706-20-7 (4-Amino-4-tetrahydropyranyl)methanol 18316484, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; MERCK SHARP & DOHME CORP.; GREENLEE, Mark, L.; WILKENING, Robert; APGAR, James; WILDONGER, Kenneth, James; MENG, Dongfang; PARKER, Dann, L.; WO2010/19203; (2010); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

130290-79-8, (Tetrahydro-2H-pyran-4-yl)methanamine is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

4-Fluoro-3-nitrobenzenesulfonamide (2.18 g), (tetrahydropyran-4-yl)methylamine (1.14 g), and triethylamine (1 g) were stirred in THF (30 mL) for 24 hours. The solution was diluted with ethyl acetate, washed with NaH2PO4 solution and brine, and dried (Na2SO4), filtered and concentrated. The product was triturated from ethyl acetate.

130290-79-8, As the paragraph descriping shows that 130290-79-8 is playing an increasingly important role.

Reference£º
Patent; ABBOTT LABORATORIES; US2010/160322; (2010); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4677-18-3,2-(Tetrahydro-2H-pyran-4-yl)ethanol,as a common compound, the synthetic route is as follows.

d) To a solution of 300 mg (2.2 mmol) of 2-(tetrahydro-2H-pyran-4-yl)ethanol in 10 mL of DCM at 05C TEA (0.38 mL, 2.7 mmol) and methanesulfonyl chloride (0.19 mL, 2.5 mmol) were added. The mixture was allowed to warm to room temperature and stirred at this temperature overnight. The reaction was stirred with saturated NaHC03 for 15 min and the aqueous phase was extracted with DCM (x3). The combined organic layers were dried over MgS04, filtered and concentrated to quantitatively yield 2-(tetrahydro-2H-pyran-4-yl)ethyl methanesulfonate as a colorless oil.

4677-18-3, 4677-18-3 2-(Tetrahydro-2H-pyran-4-yl)ethanol 17750944, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; LABORATORIOS DEL DR. ESTEVE, S.A.; DRACONIS PHARMA, S.L.; ALMIRALL, S.A.; TORRENS JOVER, Andoni; MERCE VIDAL, Ramon; CALDENTEY FRONTERA, Francesc Xavier; RODRIGUEZ GARRIDO, Antonio, David; CARCELLER GONZALEZ, Elena; SALAS SOLANA, Jordi; WO2013/37960; (2013); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.61363-56-2,2H-Pyran-3,5(4H,6H)-dione,as a common compound, the synthetic route is as follows.,61363-56-2

EXAMPLE 52 4-(4-chloro-3-nitrophenyl)-1-methyl4,9-dihydro-1H-isoxazolo[3,4-b]pyrano[4,3-e]pyridine-3,5(6H,8H)-dione The product from Example 45A (0.085 g, 0.75 mmol), 3nitro-4-chlorobenzaldehyde(0.14 g, 0.75 mmol) and 2H-pyran-3,5(4H,6H)-dione (0.085 g, 0.75 mmol) were heated in 2 mL of ethanol for 2 days. The resulting mixture was allowed to cool to ambient temperature and filtered to provide the title compound as the filter cake (0.09 g). 1H NMR (300 MHz, DMSO-d6) delta 3.28 (s, 3H), 4.06 (s, 2H), 4.58 (s, 2H), 4.88 (s, 1H), 7.6 (dd, 1H), 7.7 (d, 1H), 7.9 (d, 1H), 10.8 (s, 1H); MS (ESI) m/z 376 (M+H)-; Anal. Calcd for C16H12N3ClO6: C, 50.88;H, 3.20; N, 11.12. Found: C, 50.86;H, 3.63; N, 10.52.

The synthetic route of 61363-56-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Drizin, Irene; Altenbach, Robert J.; Carroll, William A.; US2002/7059; (2002); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

2081-44-9, Tetrahydro-2H-pyran-4-ol is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution of tetrahydro-2H-pyran-4-ol (612 mg, 6 mmol) in DCM (5 mL) was added EtsN (1002 uL, 7.2 mmol) and MsCI (510 uL, 6.6 mmol) at room temperature. The mixture was stirred at room temperature for 2 hours. After that the mixture wasconcentrated to give a white solid which was used for next step directly.

2081-44-9, As the paragraph descriping shows that 2081-44-9 is playing an increasingly important role.

Reference£º
Patent; HUTCHISON MEDIPHARMA LIMITED; SU, Wei-Guo; DENG, Wei; WO2014/86032; (2014); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.220641-87-2,N-Methyltetrahydro-2H-pyran-4-amine,as a common compound, the synthetic route is as follows.

A solution of N-methyl-(tetrahydro-pyran-4-yl)-amine (0.25 g, 2.17 mmol), Cs2CO3 (1.41 g, 4.34 mmol) and compound 4 (0.85 g, 2.17 mmol) in THF (20 mL) is stirred at room temperature for 72 h. The reaction mixture is filtered through Celite , the solids are washed with ethyl acetate and DCM and the filtrate is concentrated under reduced pressure. The residue is purified by column chromatography (silica, eluent: heptanes, 50-100% ethyl acetate) to yield 374 mg of compound 5. Yield 41%;. LC-MS (LC Method b): retention time: 1.51 min, m/z 424 [M+H], 220641-87-2

As the paragraph descriping shows that 220641-87-2 is playing an increasingly important role.

Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; BARTOLOZZI, Alessandra; HICKEY, Eugene, Richard; RIETHER, Doris; WU, Lifen; ZINDELL, Renee; BLUMIRE, Nigel; ERMANN, Monika; GLENN, Edward, Thomas; KHOR, Someina; ZAWADZKI, Przemyslaw; WO2010/147792; (2010); A2;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

2081-44-9, Tetrahydro-2H-pyran-4-ol is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a mixture of NaH (1.8 g, 40 mmol) in anhydrous THF (10 mL) was added reagent 1 (2.0 g, 20 mmol). The mixture was stirred at room temperature for 1 h before addition of a solution of 4-methylbenzene-1 -sulfonyl chloride (4.6 g, 24 mmol) in THF (10 mL). The resulting mixture was stirred at room temperature for 15 h. The solution was quenched with saturated, aqueous NH4CI solution (30 mL). The mixture was extracted with EtOAc (100 mL x 3). The combined organic layers were dried over Na2S04 and evaporated to dryness. Flash chromatography (silica, petroleum ether : EtOAc 100:1 to 1 :1 ) gave reagent 2 (4.7 g, 92%). 1H NMR (CDCIs) delta 7.79 (d, J = 8.4 Hz, 2 H), 7.33 (d, J = 4.0 Hz, 2 H), 4.64-4.70 (m, 1 H), 3.82-3.87 (m, 2 H), 3.42-3.48 (m, 2 H), 2.43 (s, 3 H) , 1 .75-1.87 (m, 2 H), 1 .68-1.74 (m, 2 H)., 2081-44-9

2081-44-9 Tetrahydro-2H-pyran-4-ol 74956, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; H. LUNDBECK A/S; ESKILDSEN, J¡ãrgen; WO2014/49133; (2014); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.25637-16-5,4-Bromotetrahydropyran,as a common compound, the synthetic route is as follows.

General procedure: To a cooled solution of compound 6 (361.0 mg, 1 mmol) in DMF (10 mL) was added NaH (60% in oil, 48.0 mg, 1.2 mmol) carefully. The mixture was stirred at 0 C for 1h. A solution of R1X (X=Cl, Br; 1.2 mmol) in DMF (5 mL) was then added dropwise in the mixture. The mixture was heated to 40 C and stirred for 8-16 h. The reaction mixture was cooled and quenched at 0 C with a saturated NH4Cl aqueous solution. Then mixture was concentrated under vacuum to remove most of the DMF and re-dissolved with CH2Cl2. After filtering, the filtrate was washed with saturated NaCl aqueous solution, dried with MgSO4 and concentrated under vacuum. The crude material was purified by column chromatography (PE/EA) on silica gel to afford compound 6a-6r., 25637-16-5

25637-16-5 4-Bromotetrahydropyran 13349654, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Article; Chen, Peng; Zhang, Dianwen; Li, Meng; Wu, Qiong; Lam, Yuko P.Y.; Guo, Yan; Chen, Chen; Bai, Nan; Malhotra, Shipra; Li, Wei; O’Connor, Peter B.; Fu, Hongzheng; European Journal of Medicinal Chemistry; vol. 183; (2019);,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

29943-42-8, Dihydro-2H-pyran-4(3H)-one is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To the stirred solution of tetrahydro-4H-pyran-4-one (2 g, 9.33 mmol), tert-butoxycarbonyl hydrazide (1.8 g, 13.99 mmol) in AcOH: MeOH (1 :1 , 10 mL), NaCNBH3 (0.52 g, 8.4 mmol) was added portion wise at 0 C and the reaction mixture was stirred at RT for 30 min. Completion of the reaction was monitored by TLC; the reaction mixture was then concentrated under vacuum. The resulting mixture was suspended with 10% NaHC03 (20 mL) and was extracted with DCM (2 x 15 ml_). The combined organic layer was washed with brine (10 mL), dried over anhydrous Na2S04 and concentrated under vacuum to afford the title compound. Yield: 99% (crude) (2 g, off white solid). 1H NMR (400 MHz, DMSO-d6): delta 8.20 (s, 1 H), 4.34 (s, 1 H), 3.82-3.81 (m, 2H), 3.29-3.26 (m, 2H), 2.89-2.88 (m, 1 H), 1.63 (t, J = 2.0 Hz, 2H), 1.38 (s, 9H), 1.24 (t, J = 4.0 Hz, 2H). LCMS: (Method A) 1 17.2 (M-Boc), Rt. 1.2 min, 99.7%., 29943-42-8

As the paragraph descriping shows that 29943-42-8 is playing an increasingly important role.

Reference£º
Patent; ASCENEURON S.A.; QUATTROPANI, Anna; KULKARNI, Santosh S.; GIRI, Awadut Gajendra; (179 pag.)WO2019/37861; (2019); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics