Month: September 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1172623-99-2,tert-Butyl ((2R,3S)-2-(2,5-difluorophenyl)-5-hydroxytetrahydro-2H-pyran-3-yl)carbamate,as a common compound, the synthetic route is as follows.

A solution of 1 Hg (11.53 g, 35.03 mmol)Was dissolved in dichloromethane (130 mL) and cooled to 0 C. Dess-Martin periodinane (29.72 g, 70.06 mmol) was added portionwise to the reaction solution and allowed to warm to room temperature for 4 hours The Down to 0 C,The saturated sodium bicarbonate solution (60mL) was added dropwise to the reaction solution, stirred for 20 minutes, filtered, the filtrate was allowed to stand and the aqueous phase was extracted with methyl tertiary butyl ether (60 mL chi 3) (30 mL chi 2). The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated. Column chromatography (petroleum ether / ethyl acetate (nu / nu) = 10: 1 – 4: 1) to give white crystalline powder intermediate 1 (10.85 g, yield 94.7%), 1172623-99-2

As the paragraph descriping shows that 1172623-99-2 is playing an increasingly important role.

Reference£º
Patent; SICHUAN HAISCO PHARMACEUTICAL CO., LTD; FAN, JIANG; FENG, JIAN-CHUAN; PENG, FEI; CHEN, QING-PING; (89 pag.)TW2017/8224; (2017); A;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

101691-94-5, 4-(Iodomethyl)tetrahydro-2H-pyran is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Preparation 8: Triphenyl(tetrahydropyran4-ylmethyl)phosphonium iodide; PPh,iA mixture of Preparation 7 (350g5 1.55M) and triphenylphosphine (406g, 1.55M) in acetonitrile (1.6L) was heated under reflux. After 27h the mixture was cooled and filtered, washed with diethyl ether and dried in air to provide a white solid (504g). Filtrate and washings were returned to reflux and concentrated to 750mL, reflux was maintained for 16h before cooling and dilution with diethyl ether (ca 1,2L). A precipitate formed which was stirred for 30min before being filtered, washed with diethyl ether (2 x 300mL) and dried in air to yield a further crop (lOOg). Overall yield of the title compound (604 g, 80%). RT = 2.7min; m/z (ES+) = 361.2.

101691-94-5, The synthetic route of 101691-94-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PROSIDION LIMITED; WO2006/16178; (2006); 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.1768-64-5,4-Chlorotetrahydropyran,as a common compound, the synthetic route is as follows.

2-Propyl-lH-imidazo[4,5-c]quinolin-l-ol (0.4 g, 1.8 mmol), 4- chlorotetrahydropyran (0.4 g, 3.3 mmol), and l,8-diazabicyclo[5.4.0]undec-7-ene (0.4 g, 2.6 mmol) were combined in a pressure vessel. The vessel was sealed and then heated in an oven at 120 0C for 22 hours. The reaction was repeated on a larger scale (x8). The small and larger scale reaction mixtures were combined and then partitioned between dichloromethane (150 mL) and saturated aqueous sodium carbonate (25 mL). The organic layer was separated, washed with water (3 x 25 mL), dried over potassium carbonate, filtered, and then concentrated under reduced pressure to provide 4.8 g of crude product as a brown oil. This material was purified by column chromatography (silica gel eluted with 5% methanol in dichloromethane containing 5 mL of ammonium hydroxide per liter of dichloromethane) to provide 0.98 g of 2-propyl-l-(tetrahydro-2//-pyran-4-yloxy)-l/-r- imidazo[4,5-c]quinoline as a yellow oil. HRMS (ESI) calcd for Ci8H2IN3O2 + H+: 312.1712, found 312.1712.

1768-64-5, 1768-64-5 4-Chlorotetrahydropyran 137202, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; 3M INNOVATIVE PROPERTIES COMPANY; WO2007/75468; (2007); A1;,
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

Tetrahydropyran-4-one (7.5 g, 75 mmol, 1 equiv.) in MeOH (75 mL) was cooled to 0 C. NaBH4 (1.425 g, 37.5 mmol, 0.5 equiv.) was added in portions at 0 C. The mixture was heated to RT and stirred for 1 h at RT. MeOH was distilled off and the mixture was diluted with iced water, neutralised with acetic acid, and extracted with EA (3¡Á30 mL). The organic phase was concentrated under reduced pressure and the product was obtained as a colourless oil (4.3 g, 56% yield).

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

Reference£º
Patent; Gruenenthal GmbH; US2012/46301; (2012); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

1228779-96-1, 3-Nitro-4-(((tetrahydro-2H-pyran-4-yl)methyl)amino)benzenesulfonamide is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A mixture of 2-((lH-pyrrolo[2,3-b]pyridin-5-yl)oxy)-4-(4-((6-(4- chlorophenyl)spiro[3.5]non-6-en-7-yl)methyl)piperazin-l-yl)benzoic acid (1.75 g, 3 mmol), 3-nitro-4-(((tetrahy(ko-2H-pyran-4-yl)memyl)amino)benzenesulfonamide (1.43 g, 4.5 mmol), EDCI (1.15 g, 6 mmol) and 4-(N,N-cUmemylamino)pyridine (550 mg, 4.5mmol) and dichloromethane (40 ml) was reacted at room temperature for overnight, followed by adding water. The water layer was extracted with dichloromethane. The combined organic layers were washed with brine, concentrated and purified through silica gel column to afford 2-((lH-pyrrolo[2,3-b]pyridin-5- yl)oxy)-4-(4-((6-(4-chlorophenyl)spiro[3.5]non-6-en-7-yl)methyl)piperazin-l-yl)-N- ((3-nitro-4-(((tetrahydro-2H-pyran-4-yl)methyl)amino)phenyl)sulf onyl)benzamide ( 1.7 g, 64.4 %) as yellow solid. 1H NMR (400 MHz, Methanol-^) delta 8.70 (d, / = 2.3 Hz, 1H), 8.01 (d, / = 2.7 Hz, 1H), 7.87 (d, J = 9.2, 2.3 Hz, 1H), 7.66 (d, / = 8.9 Hz, 1H), 7.55 (d, / = 2.7 Hz, 1H), 7.47 (d, / = 3.4 Hz, 1H), 7.38 (d, / = 8.4 Hz, 2H), 7.10 (d, / = 8.4 Hz, 2H), 6.97 (d, / = 9.2 Hz, 1H), 6.77 (dd, / = 8.9, 2.4 Hz, 1H), 6.44 (d, / = 3.4 Hz, 1H), 6.34 (d, / = 2.4 Hz, 1H), 4.02 – 3.94 (m, 3H), 3.66 (s, 3H), 3.49 – 3.38 (m, 2H), 3.41 – 3.25 (m, 7H), 2.42 (s, 3H), 2.26 (s, 3H), 2.00 – 1.67 (m, 4H), 1.45 – 1.38 (m, 2H).

1228779-96-1, The synthetic route of 1228779-96-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; THE REGENTS OF THE UNIVERSITY OF MICHIGAN; WANG, Chia, Wei; CHEN, Jianyong; (131 pag.)WO2018/27097; (2018); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

4295-99-2, 4-Cyanotetrahydro-4H-pyran is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

4-(3-Chloropropyl)-tetrahydro-2H-pyran-4-carbonitrile. To a stirred solution of 1 M LiHMDS (25 mL, 25 mmol) in THF (10 mL) at -78 C. was added dropwise a solution of tetrahydro-2H-pyran-4-carbonitrile (2.23 g, 20 mmol) in THF (15 mL) over 10 minutes. After 40 min, 1-chloro-3-iodopropane (2.7 mL, 25 mmol) was added at once, stirred at -78 C. for 1 h and 4 h room temperature. Then the reaction mixture was diluted with ether (100 mL), washed with water (20 mL) and brine (20 mL), dried (Na2SO4), filtered and concentrated to give yellow oil which was purified by flash column chromatography using 10-30% EtOAc/Hexanes to afford the title compound as a colorless liquid (3.74 g, 99%). 1H NMR (500 MHz, CDCl3) delta: 3.97 (2H, dd, J=11.3, 3.7 Hz), 3.71 (2H, td, J=12.2, 1.8 Hz), 3.61 (2H, t, J=6.3 Hz), 2.05-1.98 (2H, m), 1.88 (2H, dd, J=13.4, 1.8 Hz), 1.77-1.74 (2H, m), 1.65-1.59 (2H, m)., 4295-99-2

The synthetic route of 4295-99-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Bristol-Myers Squibb Company; US2008/4265; (2008); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

31608-22-7, 2-(4-Bromobutoxy)tetrahydro-2H-pyran is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

PREPARATION 10 7-tetrahydropyranyloxyhept-2-yne-1-ol (Formula XXII: A is trimethylene). Lithium metal (7.7 g.) is added in small pieces with stirring to a solution of ferric nitrate (300 mg.) in 1 l. of liquid ammonia. The mixture is then stirred under reflux until the blue color is replaced by a pale grey color. Then, a solution of propargyl alcohol (28 g.) in 250 ml. of diethyl ether is added slowly with stirring. After stirring 2 hours under reflux, a solution of 1-tetrahydropyranyloxy-4-bromobutane (118 g.) in 250 ml. of diethyl ether is added slowly with stirring. After stirring 4 hours under reflux, 300 ml. of water and then 300 ml. of diethyl ether are added. The mixture is stirred about 15 hours, the ammonia being allowed to evaporate during that time. The diethyl ether layer is separated, washed with water and with saturated aqueous sodium chloride solution, dried, and evaporated under reduced pressure to give a residue. The residue is chromatographed on 4 kg. of silica gel, eluding with 8 l. 20%, 6 l. 40%, 6 l. 60%, 6 l. 80%, and 9 l. 100% ethyl acetate-Skellysolve B mixtures, collecting 1.5 l. fractions. Fractions 9-12 are combined and evaporated to give 56 g. of 7-tetrahydropyranyloxyhept-2-yne-1-ol., 31608-22-7

As the paragraph descriping shows that 31608-22-7 is playing an increasingly important role.

Reference£º
Patent; The Upjohn Company; US3983155; (1976); A;,
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.33821-94-2,2-(3-Bromopropoxy)tetrahydro-2H-pyran,as a common compound, the synthetic route is as follows.

Example 11; N-Cyclopropyl-3-[N-(2,2-dimethyl-1-oxoindan-5-yl)-N-(3-hydroxypropyl)amino]-4-methylbenzamidea) N-Cyclopropyl-3-[N-(2,2-dimethyl-1-oxoindan-5-yl)-N-(3-(tetrahydropyran-2-yloxy)propyl)amino]-4-methylbenzamideTo a suspension of N-cyclopropyl-3-(2,2-dimethyl-1-oxoindan-5-ylamino)-4-methylbenzamide (0.2 g, 0.57 mmol, obtained in example 2) in dry toluene (6.5 mL), sodium hydride (50 mg, 60% dispersion in oil, 1.14 mmol) and 15-crown-5 (4 mg, 0.02 mmol) were added under argon and the mixture was stirred at room temperature for 20 min. Then, 3-bromopropanol tetrahydropyranyl ether (0.13 g, 0.57 mmol) was added and the mixture was heated at 90 C. overnight. It was allowed to cool and diluted with EtOAc and saturated NaHCO3. The phases were separated and the organic phase was dried over Na2SO4. The solvent was evaporated to afford the desired compound (quantitative yield).LC-MS (method 1): tR=9.74 min; m/z=491.2 [M+H]+.

33821-94-2, The synthetic route of 33821-94-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PALAU PHARMA, S.A.; US2010/222363; (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.2081-44-9,Tetrahydro-2H-pyran-4-ol,as a common compound, the synthetic route is as follows.

Step A: Preparation of tetrahydro-2H-pyran-4-yl methanesulfonate: To a solution of tetrahydro-2H-pyran-4-ol (2.5 g, 24.5 mmol) in DCM (40 mL) was added DIEA (6.40 mL, 36.7 mmol) at 0 C and allowed to stir under nitrogen for 10 minutes. Methane sulfonyl chloride (2.18 mL, 28.1 mmol) was added slowly. The reaction was allowed to proceed for 1 hour at 0 C. The reaction was partitioned between 100 mL of DCM and 50 mL of 0.5 M hydrochloric acid. The layers were separated and the organic layer was then washed sequentially with water, saturated sodium bicarbonate, and brine. The organic layer was dried over MgSO t, filtered, and concentrated under reduced pressure and dried on high vacuum to afford tetrahydro-2H-pyran-4-yl methanesulfonate (4.4 g, 24.4 mmol, 99.7% yield).

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

Reference£º
Patent; ARRAY BIOPHARMA INC.; BOYS, Mark Laurence; BURGESS, Laurence, E.; GRONEBERG, Robert, D.; HARVEY, Darren, M.; HUANG, Lily; KERCHER, Timothy; KRASER, Christopher, F.; LAIRD, Ellen; TARLTON, Eugene; ZHAO, Qian; WO2011/130146; (2011); 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.1768-64-5,4-Chlorotetrahydropyran,as a common compound, the synthetic route is as follows.

4-Chlorotetrahydropyran (650 muL, 6.0 mmol) was dissolved in THF (6 mL). Magnesium turnings (2.0 g, 80.7 mmol) was added to the mixture followed by methyl iodide (14 muL, 230 mumol). The mixture was stirred at 30 C. for 10 minutes and additional 4-chlorotetrahydropyran (9.3 g, 77 mmol) diluted in THF (60 mL) was added dropwise. 2.0M Isopropylmagnesium chloride in THF (2.0 mL) was added and the mixture was stirred overnight at 30 C. The mixture was cooled to room temperature to give a grey slurry of 0.8M 4-tetrahydropyranmagnesium chloride in THF., 1768-64-5

As the paragraph descriping shows that 1768-64-5 is playing an increasingly important role.

Reference£º
Patent; STANGELAND, Eric; SCHMIDT, Jane; SAITO, Daisuke Roland; HUGHES, Adam; PATTERSON, Lori Jean; US2011/21597; (2011); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics