Month: November 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.137052-08-5,1-(Tetrahydro-2H-pyran-4-yl)ethanone,as a common compound, the synthetic route is as follows.

Step 3 A 200 mL sealed tube was charged with 4-acetyltetrahydro-4H-pyran 3 (7.0 g, 55 mmol), THF (100 mL), and a solution of titanium(IV) ethoxide (28.6 mL, 136 mmol) in THF (30 mL). The resulting mixture was degassed by evacuation and back-fill with N2 (3*), sealed, and immersed in a 85 C. oil bath. After 30 h, the reaction was poured into an erlenmeyer containing 300 mL of water, and the mixture was further diluted with EtOAc (200 mL) and stirred vigorously for 15 minutes. The mixture was then filtered through paper with copious EtOAc washes. The phases of the filtrate were separated and the aqueous portion was extracted 2* with EtOAc. The organic portions were combined, washed with brine, dried over MgSO4, filtered, and concentrated. This crude sample was subjected to column chromatography (ISCO, 330 g silica, 100 mL/min, 0% to 100% EtOAc/hexanes) to give (R)-2-methyl-N-(1-(tetrahydro-2H-pyran-4-yl)ethylidene)propane-2-sulfinamide 4 (9.2 g, 73%). LCMS (conditions D): tR=1.85 min, m/e=232.2 (M+H, base).

137052-08-5, The synthetic route of 137052-08-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Schering Corporation; US2012/195881; (2012); 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.

As shown in step 2-i of Scheme 2, methanesulfonyl chloride (12 mL, 0.155 mol) was added dropwise to a mixture of tetrahydro-2H-pyran-4-ol (15.83 g, 0.155 mol), triethylamine (21.6 mL, 0.155 mol), and dimethylaminopyridine (1.89 g, 0.015 mol) in 200 mL of DCM at 00C. The reaction was warmed to room temperature and stirred for 16 hours. The organics were washed with water, washed with brine, dried over magnesium sulfate, filtered, and the volatiles removed under reduced pressure to provide tetrahydro-2H-pyran-4- yl methanesulfonate (Compound 1010, 22.6 g, 80.9% yield) as a yellow solid: 1H NMR (300 MHz, CDCl3) delta 4.90 (qn, J=4.2 Hz, IH), 3.95 (dt, J=12.0, 4.2 Hz, 2H), 3.59-3.51 (m, 2H), 3.04 (s, 3H), 2.08-2.01 (m, 2H), 1.94-1.82 (m, 2H)., 2081-44-9

The synthetic route of 2081-44-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; VERTEX PHARMACEUTICALS INCORPORATED; LAUFFER, David; LI, Pan; MCGINTY, Kira; RONKIN, Steven; TANG, Qing; GRILLOT, Anne-Laure; WAAL, Nathan; WO2010/48131; (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.83-87-4,(3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate,as a common compound, the synthetic route is as follows.

83-87-4, In the scheme shown below, the synthesis of a C-glycosyl containing molecule is described. The sequence commences with the reaction of peracetyl D-glucose with 33% HBr in acetic acid to produce the anomeric bromide 45. Treatment of 45 with excess Grignard reagent 46, generated from 1,4- dibromobenzene and magnesium, followed by treatment of the crude product with acetic anhydride in pyridine provides the desired bromophenyl derivative 47. Conversion of 47 to the corresponding pinacol boronate ester 49 was accomplished by reaction with zs(pinicolato)diboron (48) under the influence of palladium catalysis. Suzuki coupling of 48 with 8 gave the expected biphenyl derivative 50 that was deprotected by first hydrolysis in aqueous methanol and triethylamine, hydrogenolysis over palladium on carbon and finally treatment with aqueous HF to give the desired product 51.

As the paragraph descriping shows that 83-87-4 is playing an increasingly important role.

Reference£º
Patent; MICROBIA, INC.; WO2006/121861; (2006); A2;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

53911-68-5, 4-(4-Chlorophenyl)dihydro-2H-pyran-2,6(3H)-dione is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

53911-68-5, Prepared by dissolving an equimolar mixture of 3-(4-chlorophenyl)glutaric anhydride and commercial 5-chloro-2-hydroxyaniline in boiling dichloromethane. Upon cooling to rt product precipitates and yields after isolation 87% of /V-(2-hydroxy-5- chlorophenyl)-3-(4-chlorophenyl)glutaramic acid as colourless crystals.

The synthetic route of 53911-68-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; UNIVERSITAET DES SAARLANDES; ENGEL, Matthias; FROeHNER, Wolfgang; STROBA, Adriane; BIONDI, Ricardo M.; WO2010/43711; (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.125995-03-1,Atorvastatin lactone,as a common compound, the synthetic route is as follows.

Example 14 ; (2R,4R)-1-{2-[4-(tert-Butyldimethylsilyloxy)-6-oxotetrahydro-2-pyranyl]-ethyl}-5-(4-fluorophenyl)-2-isopropyl-4-phenyl-1H-pyrrole-3-carboxylic acid phenylamide; (23) (synthesis from Atorvastatin) was prepared in 92% yield according to WO 2005/012246 A1. [Show Image] LC-MS (ESI+) m/z 655 (M+1)., 125995-03-1

As the paragraph descriping shows that 125995-03-1 is playing an increasingly important role.

Reference£º
Patent; Ratiopharm GmbH; EP1834944; (2007); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

220641-87-2, N-Methyltetrahydro-2H-pyran-4-amine is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Synthesis of example 258: 2-Ethylsulfanyl-N-[(3-fluorophenyl)-methyl]-4-methyl-6-(methyl- tetrahydro-pyran-4-yl-amin -pyridine-3-carboxylic acid amideA solution of 338 mg (1.0 mmol) 6-chloro-2-ethylsulfanyl-N-[(3-fluorophenyl)-methyl]-4- methyl-pyridine-3-carboxylic acid amide (synthesis is described in section b) of example 2), 172 mg (1.5 mmol) N-methyl-tetrahydro-2H-pyran-4-amine and 509 muIota (3.0 mmol) DIPEA in NMP (1 ml) was heated in the microwave at 180 C for 2 h. Subsequently the RM was diluted with a 2M aq. NaOH sol, water and EtOAc and the layers were separated. The organic layer was washed with water and brine, dried over MgS04 and concentrated in vacuo. Purification of the residue by CC (hexane/EtOAc 13:7) provided 77 mg (0.18 mmol, 18%) 2-Ethylsulfanyl- N-[(3-fluorophenyl)-methyl]-4-methyl-6-(methyl-tetrahydro-pyran-4-yl-amino)-pyridine-3- carboxylic acid amide (example 258). [M+H]+ 418.2, 220641-87-2

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

Reference£º
Patent; GRUeNENTHAL GMBH; KUeHNERT, Sven; BAHRENBERG, Gregor; KLESS, Achim; SCHROeDER, Wolfgang; LUCAS, Simon; WO2012/52167; (2012); 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.40191-32-0,Tetrahydro-2H-pyran-4-carbonyl chloride,as a common compound, the synthetic route is as follows.

[1-(4-Methylamino-benzenesulfonyl)-piperidin-4-yl]-carbamic acid tert-butyl ester (0.13 g, 0.35 mmol) was dissolved in THF (5 ml). To this was added diisopropylethylamine (0.18 ml, 0.7 mmol) in one portion followed by the drop wise addition of tetrahydro-2H-pyran-4-carbonyl chloride (0.06 ml, 0.38 mmol) and the mixture was stirred at room temperature under a nitrogen atmosphere for 3 hours. After this time the mixture was concentrated, diluted with DCM (200 ml) and washed sequentially with HCl (1M solution, 10 ml), NaOH (1M solution, 10 ml) and brine (10 ml). The organic layer was separated, dried (MgSO4), filtered and concentrated to give the title compound (0.17 g, 98% yield) as a white powder which was taken on without further purification. Tr=1.89 min m/z (ES+) (M+Na+) 504.

40191-32-0, 40191-32-0 Tetrahydro-2H-pyran-4-carbonyl chloride 2795505, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; Prime, Michael; Courtney, Stephen Martin; Marston, Richard; Dominguez, Celia; Macdonald, Douglas; Wityak, John; US2012/302539; (2012); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

25850-22-0, 2,2-Dimethyltetrahydro-2H-pyran-4-amine is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 13 A 0 C. suspension of 2,2-dimethyltetrahydro-2H-pyran-4-amine (0.806 g, 6.24 mmol) in THF (30 mL) was treated drop-wise with 2-chloroethyl isocyanate (0.585 mL, 6.86 mmol), allowed to warm to RT as the cooling bath expired and stirred overnight. The mixture was treated with additional 2-chloroethyl isocyanate (160 muL) and stirred at RT for an additional 24 hours, then concentrated to dryness, the residue dissolved in EtOAc and washed with saturated NH4Cl (1*), NaHCO3 (1*) and brine (1*), dried over MgSO4 and concentrated to dryness to afford 1-(2-chloroethyl)-3-(2,2-dimethyltetrahydro-2H-pyran-4-yl)urea (700 mg, 48%) as a yellow oil. MS (ESI) m/z: 235.1 (M+H+)., 25850-22-0

25850-22-0 2,2-Dimethyltetrahydro-2H-pyran-4-amine 3809203, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; Deciphera Pharmaceuticals, LLC; Flynn, Daniel L.; Kaufman, Michael D.; Samarakoon, Thiwanka; Caldwell, Timothy Malcolm; Vogeti, Lakshminarayana; Ahn, YuMi; Patt, William C.; Yates, Karen M.; US2014/315917; (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.624734-17-4,3-Methoxydihydro-2H-pyran-4(3H)-one,as a common compound, the synthetic route is as follows.

624734-17-4, 3-Methoxy-tetrahydro-pyran-4-one* (500 mg, 3.84 mmol), benzylamine (0.42 ml, 3.84 mmol) and Raney-Nickel (100 mg) were suspended in 20 ml of dry ethanol and the reaction mixture was stirred under hydrogen atmosphere (4.5 bar) for 3 days. The reaction mixture was filtered on a celite pad and the organic phase was concentrated under vacuum.The crude product obtained was dissolved in 10 ml of methanol, loaded on a SCX cartridge (lOg) and eluted with a 2M solution of ammonia in methanol. The solvent was concentrated under vacuum and the crude product obtained was purified by flash chromatography (Isolute cartridge lOg; eluent: dichloromethane/methano 1=96/4%). 163 mg (0.73 mmol) of the desired product were obtained as cis racemate (relative configuration assigned by NMR).

The synthetic route of 624734-17-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; EBEL, Heiner; FRATTINI, Sara; GERLACH, Kai; GIOVANNINI, Riccardo; HOENKE, Christoph; SANTAGOSTINO, Marco; SCHEUERER, Stefan; TRIESELMANN, Thomas; WO2011/73155; (2011); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

156353-01-4, N-Methoxy-N-methyltetrahydro-2H-pyran-4-carboxamide is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step 2 A flask was charged with N-methoxy-N-methyltetrahydro-2H-pyran-4-carboxamide 2 (11.7 g, 67.5 mmol) and THF (350 mL). The resulting mixture was immersed in a cooling bath at -60 C., and methylmagnesium bromide (3.0 M in ether, 33.8 mL, 101.4 mmol) was added via syringe over ~8 min. The temperature of the bath was allowed to rise to 0 C. over 6 h. At that time, the reaction was diluted with water and EtOAc and stirred vigorously for 10 min. The phases were separated, and the aqueous layer was extracted with EtOAc. The organic portions were combined, washed with brine, dried over MgSO4, filtered, and concentrated. The crude residue was subjected to column chromatography (120 g silica, 80 mL/min, 0% to 100% EtOAc/hexanes) to give 4-acetyltetrahydro-4H-pyran 3 (7.05 g, 55.0 mmol, 81%). 1H NMR (400 MHz, CDCl3) for 3: delta 3.95 (ddd, J=11.6, 4.4, 2.8 Hz, 2H), 3.38 (dt, Jd=2.8 Hz, Jt=11.6 Hz, 2H), 2.50 (m, 1H), 2.12 (s, 3H), 1.75 (m, 2H), 1.65 (m, 2H). LCMS for 3 (conditions D): tR=0.83 min, m/e=129.4 (M+H, base).

156353-01-4, 156353-01-4 N-Methoxy-N-methyltetrahydro-2H-pyran-4-carboxamide 23144693, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; Schering Corporation; US2012/195881; (2012); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics