Day: August 27, 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.873397-34-3,Tetrahydro-2H-pyran-3-carboxylic acid,as a common compound, the synthetic route is as follows.

Into a 8-mL round-bottom flask, was placed ethyl (S)-5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxylate (from the second eluting isomer of Example 47 Step 5) (200 mg, 0.85 mmol, 1 equiv) in DMF (4 mL), HATU (388 mg, 1.02 mmol, 1.2 equiv), DIEA (330 mg, 2.55 mmol, 3 equiv) and oxane-3-carboxylic acid (166 mg, 1.28 mmol, 1.5 equiv). The resulting solution was stirred overnight at room temperature. The reaction was then quenched with water. The resulting solution was extracted with EtOAc (3¡Á5 mL). The combined organic layers were washed with brine (2¡Á5 mL), dried over anhydrous Na2SO4, filtered, and concentrated under vacuum. The residue was purified by silica gel chromatography (EtOAc/pet. ether, 1:3) to afford the racemic mixture of the title compounds as a yellow oil (150 mg). The racemate was separated by Chiral-Prep-HPLC (Column Chiralpak IC, 5 mum, 2¡Á25 cm; Mobile Phase A:hexanes; Mobile Phase B: EtOH; Gradient: 30percent B for 21 min; Flow rate: 20 mL/min; Detector, UV 254, 220 nm) to afford the single isomers of title compounds as yellow oils (first eluting isomer: 20 mg, 7percent yield; second eluting isomer: 20 mg, 7percent yield). MS: (ES, m/z): 348 [M+H]+.

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Reference£º
Patent; Forma Therapeutics, Inc.; Zheng, Xiaozhang; Ng, Pui Yee; Han, Bingsong; Thomason, Jennifer R.; Zablocki, Mary-Margaret; Liu, Cuixian; Davis, Heather; Rudnitskaya, Aleksandra; Lancia, JR., David; Bair, Kenneth W.; Millan, David S.; Martin, Matthew W.; (190 pag.)US2016/222028; (2016); 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

Synthesis of (4-methyltetrahvdro-2H-pyran-4-yl)methanaminePreparation of 4-methyltetrahydro-2H-pyran-4-carbonitrile To a solution of tetrahydro-2H-pyran-4-carbonitrile (2 g, 18.00 mmol) in tetrahydrofuran (10 mL) at 0 – 5 C was added slowly LHMDS (21.59 mL, 21.59 mmol). The mixture was stirred for 1.5 hrs at 0 C. lodomethane (3.37 mL, 54.0 mmol) was added slowly and stirring was continued for 30 min at ~0 C and then for ~2 hrs at room temperature. The mixture was cooled to 0 C and carefully diluted with 1 N aqueous hydrochloride solution (30 mL) and EtOAc (5 mL) and concentrated under reduced pressure. The residue was taken up in diethylether and the separated organic layer was washed with brine, dried over sodium sulfate, filtered off and concentrated under reduced pressure providing crude 4-methyltetrahydro-2H-pyran-4-carbonitrile (1.8 g) as an orange oil, which was directly used in the next reaction without further purification. LCMS (m/z): 126.1 [M+H]+; Retention time = 0.44 min.

4295-99-2 4-Cyanotetrahydro-4H-pyran 11815837, aTetrahydropyrans compound, is more and more widely used in various.

Reference£º
Patent; NOVARTIS AG; ANTONIOS-MCCREA, William R.; BARSANTI, Paul A.; HU, Cheng; JIN, Xianming; LIN, Xiaodong; MARTIN, Eric J.; PAN, Yue; PFISTER, Keith B.; RENHOWE, Paul A.; SENDZIK, Martin; SUTTON, James; WAN, Lifeng; WO2012/101066; (2012); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

33821-94-2, 2-(3-Bromopropoxy)tetrahydro-2H-pyran is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

STEP A: Sodium hydride (60% mineral oil dispersion) (26.4 mg, 0.660 mmol) is added at 0C under nitrogen to the solution of (E)-2-amino-7-(4-fluoro-2-pyridin-3-yl-phenyl)-4-methyl-7,8-dihydro- 6H-quinazolin-5-one oxime (Intermediate 1) (0.2 g, 0.550 mmol) in anhydrous DMF (8 mL). After 2 min, 2-(3-bromopropoxy)tetrahydro-2H-pyrane (147 mg, 0.660 mmol) is added and the mixture is heated at 60C for 2 h. The suspension is diluted with H20 and extracted with EtOAc. The organic phase is dried over Na2S04, filtered and concentrated under reduced pressure. The residue is purified by flash column chromatography (eluent DCM/MeOH from 98/2 to 95/5) to give the expected compound (0.253 g, 0.5 mmol, Yield: 91%). LC-MS: method A, rt=l .28 min; (ES+), M+H+= 506.3 1H-NMR (DMSO-d6) delta (ppm): 8.57 (dd, J=4.84, 1.61 Hz, 1 H); 8.53 (dd, J=2.35, 0.88 Hz, 1 H); 7.76 (ddd, J=7.92, 2.35, 1.76 Hz, 1 H); 7.67 (dd, J=8.80, 5.58 Hz, 1 H); 7.45 (ddd, J=7.63, 4.70, 0.88 Hz, 1 H); 7.31 (td, J=8.80, 2.93 Hz, 1 H); 7.1 1 (dd, J=9.54, 2.79 Hz, 1 H); 6.74 (s, 2 H); 4.39-4.62 (m, 1 H); 4.11 (t, J=6.31 Hz, 2 H); 3.59-3.78 (m, 2 H); 3.32-3.48 (m, 2 H); 2.77-3.13 (m, 3 H); 2.55-2.69 (m, 2 H); 2.45 (s, 3 H); 1.87 (quin, J=6.46 Hz, 2 H); 1.27-1.79 (m, 6 H)

As the paragraph descriping shows that 33821-94-2 is playing an increasingly important role.

Reference£º
Patent; DAC SRL; AMICI, Raffaella; COLOMBO, Andrea; COURTNEY, Stephen Martin; MERCURIO, Ciro; MONTALBETTI, Christian Aldo Georges Napoleon; MORTONI, Annalisa; VARASI, Mario; WO2013/64919; (2013); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

4677-18-3, 2-(Tetrahydro-2H-pyran-4-yl)ethanol is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Intermediate 33: 2-(Tetrahydro-2/-/-pyran-4-yl)ethyl methanesulfonate To 2-(tetrahydro-2H-pyran-4-yl)ethanol (3,3g) in dry dichloromethane (100 ml) at O0C and under nitrogen was added triethylamine (4.6 ml), followed by methanesulphonyl chloride (2.6 ml) dropwise over 5 minutes. The reaction was stirred until the ice in the bath melted and left overnight at room temperature. The reaction was washed with saturated aqueous sodium bicarbonate (40 ml). The organic layer was dried by passing through a hydrophobic frit and concentrated in vacuo to yield the title compound as a yellow oil (5.4g).1 H NMR (DMSO): 4.24 (2H, t), 3.82 (2H, m), 3.80 (3H, s), 3.27 (2H, m), 2.50 (5H, m), 1.60 (2H, m).

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

Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2008/101867; (2008); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

85064-61-5, Tetrahydropyranyl-4-acetic acid is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 1: N-[6-(4-Morpholinyl)-3-pyridinyl]-2-(tetrahydro-2H-pyran-4-yl)-N-[(1-(at)[4- (trifluoromethyl)phenyl]methyl)-4-piperidinyl)methyl]acetamide; Oxalyl chloride (0.27ml, 3.05mmol) was added to a stirred solution of tetrahydro-2H- pyran-4-ylacetic acid (0.2g, 1.38mmol) in DCM (10ml). DMF (1 drop) was added and the reaction mixture stirred at room temperature for 1.5h then evaporated in vacuo to afford a colourless oil (1.17g). The crude acid chloride was dissolved in DCM (10ml) and added to a stirred solution of 6-(4-morpholinyl)-N-[(1-{[4-(trifluoromethyl)phenyl]methyl)-4- piperidinyl) methyl]-3-pyridinamine D5 (0.45g, 1.03mmol) and triethylamine (0.58ml, 4.12mmol) in DCM (10ml). After 24h the mixture was washed with saturated sodium hydrogen carbonate, the organic layer separated by passage through a phase separation cartridge and evaporated in vacuo. Chromatography on silica gel eluting with 50-100% ethyl acetate in pentane gradient afforded the title compound as an orange gum (0.47g). A 70mg portion was dissolved in 1:1 DMSO/MeCN (0.9ml) and purified by mass directed autoprep hplc on a Waters C18 5muM column 8(id 19 x 100mm) eluting with 5 – 99% MeCN in water gradient containing 0.1 % formic acid. Fractions containing the desired material were passed through a 2g SCX column, the column washed with methanol (30ml) and eluted with 1 N ammonia in methanol to afford the title compound as a colourless gum (0.05g). Mass Spectrum (AP+): Found 561 (MH+). C30H39F3N403 requires 560.

The synthetic route of 85064-61-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GLAXO GROUP LIMITED; WO2005/103038; (2005); 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

Into a 8-mL round-bottom flask, was placed a solution of 4-(4-[[2-(4-chlorophenyl)- 4,4-dimethylcyclohex-l-en-l-yl]methyl]piperazin- l-yl)-2-[l3-oxa-2,4,l0- triazatricyclo[7.4.0.0A[3,7]]trideca-l,3(7),5,8-tetraen-l0-yl]benzoic acid (35 mg, 0.06 mmol, 1.00 equiv) in dichloromethane (5 mL), 4-dimethylaminopyridine (27.8 mg, 0.23 mmol, 4.00 equiv), 3-nitro-4-[(oxan-4-ylmethyl)amino]benzene-l-sulfonamide (21.7 mg, 0.07 mmol, 1.20 equiv), EDCI (22 mg, 0.11 mmol, 2.00 equiv). The resulting solution was stirred for overnight at room temperature. The resulting mixture was concentrated under vacuum. The crude product was purified by Prep-HPLC with the following conditions (Waters-2767): Column, X-bridge RP18, 5um, l9* l00mm; mobile phase, 0.03% ammonia in water (0.03% NH4HC03 & NH40H ) and CH3CN (32% CH3CN up to 52% in 6 min); Detector, UV 254 nm. This resulted in 28.3 mg (54%) of 4-(4-[[2-(4-chlorophenyl)-4,4-dimethylcyclohex-l-en- l-yl]methyl]piperazin-l-yl)-N-([3-nitro-4-[(oxan-4-ylmethyl)amino]benzene]sulfonyl)-2-[l3- oxa-2,4,l0-triazatricyclo[7.4.0.0A[3,7]]trideca-l,3(7),5,8-tetraen-l0-yl]benzamide as a yellow solid. LC-MS-: (ES, m/z ): (ES, m/z): M+l=909, R.T= 1.52 min. The measurements of the retention were done with a reversed phase column (C18). Shimadzu LCMS 2020; 50*3.0 Kinetex 2.6u XB-C18 , 2.6 microm; Eluent A: water (0.05 % TFA); Eluent B: Acetonitrile; linear gradient. H-NMR: (CDCl3, 300 MHz) d: 8.70 (s, 1H), 8.46 (m, 2 H), 8.10-8.06 (m, 1 H), 7.89-7.60 (m, 1 H), 7.10 (s, 1 H), 6.94-6.71 (m, 5 H), 6.49 (s, 1 H), 6.16 (s, 1 H), 4.70- 4.65 (m, 2 H), 4.00-4.10 (m, 2 H), 3.67-3. l9(m, 7 H), 3.20-3.00(m, 4 H), 2.78(s, 1 H), 2.58- 2.52(m, 2 H), 2.27-2. l7(m, 3 H), 2.05-l.98(m, 4 H), 1.74-1.70 (m, 3 H), 1.55-1.40 (m, 3H), 0.98 (s, 6H).The measurements of the NMR spectra were done with BrukerAvancelll HD 300MHzwith a probe head of BBOF

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

Reference£º
Patent; NEWAVE PHARMACEUTICAL INC.; CHEN, Yi; (475 pag.)WO2020/41406; (2020); 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.1197-66-6,2,2,6,6-Tetramethyl-2H-3,5,6-trihydropyran-4-one,as a common compound, the synthetic route is as follows.

Step 3. 2,2,6,6-Tetramethyl-4-trimethylsilanylethynyl-tetrahydro-pyran-4-ol To a solution of ethynyl-trimethyl-silane (5.5 mL, 38.4 mmol) in dry THF (25 mL) was added n-BuLi (32 mL, 38.4 mmol) at -78 C. and the mixture was stirred at that temperature for 45 min followed by addition of 2,2,6,6-tetramethyl-tetrahydro-pyran-4-one (5.0 g, 32 mmol) in dry THF (25 mL) at -78 C. The mixture was stirred for 1 h and then quenched with saturated NH4Cl solution and extracted with ethyl acetate (3*100 mL). The combined organic extract was washed with water and brine solution, dried over Na2SO4, filtered, and concentrated under reduced pressure to afford the product as sticky white solid. Crude product was forwarded for next stage without purification. Yield: 8.0 g, crude.

1197-66-6 2,2,6,6-Tetramethyl-2H-3,5,6-trihydropyran-4-one 11829691, aTetrahydropyrans compound, is more and more widely used in various.

Reference£º
Patent; Janssen Pharmaceutica NV; Ahmad, Ishtiyaque; Bakthavatchalam, Rajagopal; Battula, Sivaramakrishna; Gijsen, Henricus Jacobus, Maria; Wall, Mark; US2015/51225; (2015); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

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

A 100 ml three-necked round-bottom flask, under nitrogen atmosphere, is added with 98% hydrazine hydrate (19.5 g, 0.382 mols), sodium hydroxide (12.4 g, 0.309 mol) in water (150 ml) and the solution is cooled to a temperature of -5C. 3-Isobutyl-glutaric anhydride (183.0 g, 1.075 mol) is dropped therein in about 1-2h, keeping the temperature below 0-5C and the mixture is reacted for about 1h. 35-37% Hydrochloric acid (450 ml) and toluene (400 ml) are added. Keeping a temperature of -5C, a solution of sodium nitrite (160.0 g, 2.026 mol) in water (320 ml) is added dropwise, keeping the temperature below 10-15C. After completion of the addition, the mixture is reacted for 15-20 minutes, afterwards the phases are separated and the aqueous phase is extracted with toluene (250 ml). The cooled combined organic phases are dropped into isopropanol (800 ml) under reflux in about 1 hour. The mixture is refluxed for about 30 minutes and the solution is concentrated to small volume. The resulting oil is taken up into hexane (500 ml) and left under strong stirring for 2-3 hours, the solid is filtered and dried at 50C for 16-18 hours. 205 g of a white solid are obtained, in a 78% yield. 1H-NMR (300 MHz, D2O, 28C): delta 7.00 (broad, 1H exchange with D2O); 4.70 (m, 1H); 3.00 (m, 1H); 2.80 (m, 1H); 2.10 (m, 2H); 1.95 (m, 1H); 1.60 (m, 1H); 1.20-1.00 (m, 8H); 0.80 (d, 6H).

185815-59-2 4-Isobutyldihydro-2H-pyran-2,6(3H)-dione 11480690, aTetrahydropyrans compound, is more and more widely used in various.

Reference£º
Patent; Dipharma Francis S.r.l.; EP2067768; (2009); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

1194-16-7, 2,2-Dimethyltetrahydropyran-4-one is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(0127) To a suspension of hexane-washed NaH (0.72 g, 60% in mineral oil) in tetrahydrofuran (30 ml) was added a solution of 2,2-dimethyldihydro-2H-pyran-4(3H)-one (2.0 g) in tetrahydrofuran (20 ml). The suspension was stirred at room temperature for 30 minutes. The dimethylcarbonate (6.31 ml) was added dropwise by syringe. The mixture was heated to reflux for 4 h. LC/MS showed the expected product as the major product. The mixture was acidified with 5% HCl and extracted with dichloromethane (100 ml¡Á3) and washed with water, brine and dried over Na2SO4. After evaporation, the crude product was loaded on a column and eluted with 10% ethyl acetate in hexane to give the product.

1194-16-7 2,2-Dimethyltetrahydropyran-4-one 1738159, aTetrahydropyrans compound, is more and more widely used in various.

Reference£º
Patent; AbbVie Inc.; Catron, Nathaniel; Lindley, David; Miller, Jonathan M.; Schmitt, Eric A.; Tong, Ping; US10213433; (2019); B2;,
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.101691-65-0,(Tetrahydro-2H-pyran-4-yl)methyl 4-methylbenzenesulfonate,as a common compound, the synthetic route is as follows.

EXAMPLE 85c; Preparation of intermediate 5-chloro-2-(tetrahydro-pyran-4-yl-methoxy)-benzaldehyde; A mixture of 5-chlorosalicylaldehyde (5.0 g, 32 mmol), toluene-4-sulfonic acid tetrahydro-pyran-4-ylmethyl ester (8.6 g, 32 mmol) and K2CO3 (9.5 g, 68.8 mmol) in DMF (50 mL) was heated at 75 C. overnight. After cooled to room temperature, the mixture was poured into water. The aqueous phase was extracted with EtOAc twice. The combined organic phases were washed with water and brine, dried and concentrated. The residue was purified by column chromatography to give the title compound (7.0 g).

As the paragraph descriping shows that 101691-65-0 is playing an increasingly important role.

Reference£º
Patent; Chen, Li; Han, Xingchun; He, Yun; Yang, Song; Zhang, Zhuming; US2009/163512; (2009); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics