Day: September 2, 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1152567-60-6,4-(4-Bromophenyl)tetrahydro-2H-pyran-4-carboxylic acid,as a common compound, the synthetic route is as follows.

1.34 g (4.70 mmol) of the compound from Example 72A/step 1 were stirred in 6.5 ml of thionyl chloride under reflux for 2 h. The batch was then concentrated on a rotary evaporator, the residue was taken up in toluene and the mixture was concentrated again. The resulting residue was then stirred in a mixture of methylene chloride and pentane (1:2), the solid which remained was filtered off and the filtrate was freed from the solvent. The filtrate residue obtained was dried in vacuo. 1.49 g (>100% of th.) of the target compound were isolated, this being employed in subsequent stages without further purification.

1152567-60-6, As the paragraph descriping shows that 1152567-60-6 is playing an increasingly important role.

Reference£º
Patent; BAYER SCHERING PHARMA AKTIENGESELLSCHAFT; US2011/301122; (2011); 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

Paratoluenesulfonyl chloride (300.0 g, 1.58 mol) is added to a solution of compound 21 (100.0 g, 0.98 mol) in 800.0 mL of pyridine at 0C. After stirring the reaction mixture at room temperature for 14 hours, it is pored into an ice solution of 6N HCl. Some precipitate is formed that is filtered and triturated with hexanes. After drying under vacuum the crude compound 22 is used without further purification in the next step. 1H NMR (400 MHz, chloroform-d) delta ppm 1.70-1.89 (4H, m), 2.45 (3H, s), 3.44-3.50 (2H, m), 3.86 (2H, p), 4.70 (1H, m), 7.33 (2H, d, 8.4 Hz), 7.79 (2H, d, 8.0 Hz).

2081-44-9, As the paragraph descriping shows that 2081-44-9 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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.185815-59-2,4-Isobutyldihydro-2H-pyran-2,6(3H)-dione,as a common compound, the synthetic route is as follows.

Example 9: Preparation of (3RV5-methyl-3-(‘2-oxo-2{rriRVl-phenylethyl1ammo>ethvD hexanoic acid compound (24); [0083] A three-necked flask equipped with an addition funnel, thermometer pocket, drying tube and a mechanical stirrer, was charged with hexane (100 ml), (R)-(+)- phenylethylamine (35.58 g, 0.147mole) 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 hexane (25 ml), over a period of 15-20 minutes, and stirring for additional 1.5-2 hours, at a temperature of 0-5 C. 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 aqueoua 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 22.2 g (51.9 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 99.27 percent, as measured by chiral HPLC., 185815-59-2

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

585-88-6, Maltitol is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

585-88-6, It was tested whether the following saccharides could be used as substrates for alpha-isomaltosylglucosaccharide-forming enzyme. For the purpose, a solution of maltose, maltotriose, maltotetraose, maltopentaose, maltohexaose, maltoheptaose, isomaltose, isomaltotriose, panose, isopanose, alpha,alpha-trehalose, kojibiose, nigerose, neotrehalose, cellobiose, gentibiose, maltitol, maltotriitol, lactose, sucrose, erlose, selaginose, maltosyl glucoside, or isomaltosyl glucoside was prepared. To each of the above solutions was added two units/g substrate of a purified specimen of alpha-isomaltosylglucosaccharide-forming enzyme from either Bacillus globisporus C9 strain obtained by the method in Experiment 4-2, or Bacillus globisporus C11 strain obtained by the method in Experiment 7-2, and the resulting solutions were adjusted to give a substrate concentration of 2% (w/v) and incubated at 30 C. and pH 6.0 for 24 hours. The enzyme solutions before and after the enzymatic reactions were respectively analyzed on TLC disclosed in Experiment 1 to confirm whether the enzymes act on these substrates. The results are in Table 11. TABLE 11 Enzymatic action Enzymatic action Enzyme of Enzyme of Enzyme of Enzyme of Substrate C9 strain C11 strain Substrate C9 strain C11 strain Maltose + + Nigerose + + Maltotriose ++ ++ Neotrehalose + + Maltotetraose +++ +++ Cellobiose – – Maltopentaose +++ +++ Gentibiose – – Maltohexaose +++ +++ Maltitol – – Maltoheptaose +++ +++ Maltotriitol + + Isomaltose – – Lactose – – Isomaltotriose – – Sucrose – – Panose – – Erlose + + Isopanose ++ ++ Selaginose – – alpha,alpha-Trehalose – – Maltosylglucoside ++ ++ Kojibiose + + Isomaltosylglucoside – – Note: Before and after the enzymatic reaction, the symbols ?-?, ?+?, ?++?, and ?+++? mean that it showed no change, it showed a slight reduction of the color of substrate spot and the formation of other reaction product, it showed a high reduction of the color of substrate No.spot and the formation of other reaction product, and it showed a substantial disappearance of the color of substrate spot and the formation of other reaction product, respectively. As evident from Table 11, it was revealed that the alpha-isomaltosylglucosaccharide-forming enzyme well acted on saccharides having a glucose polymerization degree of at least three and having a maltose structure at their non-reducing ends, among the saccharides tested. It was also found that the enzyme slightly acted on saccharides, having a glucose polymerization degree of two, such as maltose, kojibiose, nigerose, neotrehalose, maltotriitol, and erlose.

As the paragraph descriping shows that 585-88-6 is playing an increasingly important role.

Reference£º
Patent; Kubota, Michio; Nishimoto, Tomoyuki; Aga, Hajime; Fukuda, Shigeharu; Miyake, Toshio; US2006/8791; (2006); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

61363-56-2, 2H-Pyran-3,5(4H,6H)-dione is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,61363-56-2

2H-Pyran-3, 5(41-1, 6H)-dione (1.36 g, 11.6 mmol) was dissolved in EtOH (50 mL) and cone, sulfuric acid (1.5 mL) added. The reaction was stirred at ambient temperature overnight. The reaction was concentrated to remove the EtOH and basified (pH ~8) with saturated aqueous NaHCOs solution. (4065) The resulting brown solution was extracted with EtOAc (3 x 50 mL). The combined organic extracts were dried over Na2S04 and concentrated in vacuo. The resulting crude oil was purified by column chromatography eluting with a 0-100% gradient of EtOAc in isohexane. Product-containing fractions were combined and concentrated to afford the title compound (331 mg, 20 % Yield). dH (300 MHz, Chloroform-cf) 5.46 (s, 1H), 4.25 (s, 2H), 4.08 (d, J = 0.8 Hz, 2H), 3.99 (q, J = 7.0 Hz, 2H), 1.39 (t, J = 7.0 Hz, 3H).

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

Reference£º
Patent; UCB BIOPHARMA SRL; CHOVATIA, Prafulkumar Tulshibhai; CONNELLY, Rickki Lee; FRANKLIN, Richard Jeremy; HASLETT, Gregory William; HENRY, Alistair James; MADDEN, James; NEUSS, Judi Charlotte; NORMAN, Timothy John; PHILPS, Oliver; PITT, William Ross; RAMPALAKOS, Konstantinos; SELBY, Matthew Duncan; SELVARATNAM, Suganthan; TRANI, Giancarlo; ZHU, Zhaoning; (768 pag.)WO2019/243550; (2019); 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

Step 2: Synthesis of Toluene-4-sulfonic acid tetrahydropyran-4-yl ester To a solution of 133 g (1.31 mol) of tetrahydropyran-4-ol in pyridine (1.5 L) are added 373 g (1.95 mol) of p-toluenesulfonylchloride portionwise at 10 C. After complete addition the reaction is allowed to warm to room temperature and stirred for 18 h. The reaction is poured onto a stirred mixture of aqueous HCl/ice. The resulting precipitate is isolated by filtration and dissolved in DCM (1 L). The organic layer is washed with 1M aqueous HCl solution (1 L), followed by saturated aqueous NaHCO3 solution (1 L) and is then dried over Na2SO4. Filtration and concentration of the filtrate under reduced pressure gives 300 g of toluene-4-sulfonic acid tetrahydropyran-4-yl ester as an orange oil. Yield: 90%, ES-MS: m/z: 257 [M+H], 279 [M+Na]

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; Boehringer Ingelheim International GmbH; US2010/76029; (2010); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

64519-82-0, (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

64519-82-0, General procedure: The donor component (1equiv), the acceptor substrate (2equiv), and beta-galactosidase BglT (10U/mmol acceptor) were dissolved in potassium phosphate buffer (0.1M K2HPO4/K2HPO4, pH 6.5) and incubated in a thermomixer for 24h at 65C. For termination the temperature was enhanced to 95C for 15min. Separation and purification of the products were done either on Biogel P2 with water as eluent or on Sephadex LH-20 with water/ethanol 1:5 as eluent.

As the paragraph descriping shows that 64519-82-0 is playing an increasingly important role.

Reference£º
Article; Schroeder, Sven; Kroeger, Lars; Mattes, Ralf; Thiem, Joachim; Carbohydrate Research; vol. 403; (2015); p. 157 – 166;,
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.

A RBF was charged with tetrahydro-2H-pyran-4-ol (2.0 g, 19.58 mmol), imidazole (1.600 g, 23.50 mmol), triphenylphosphine (5.39 g, 20.56 mmol), and tetrahydrofuran (39.2 ml) and cooled to 0 C. A solution of iodine (5.96 g, 23.50 mmol) in tetrahydrofuran (39.2 ml) was added slowly dropwise. The reaction was warmed to room temperature and stirred overnight. The reaction was diluted with ethyl acetate and washed with water. The aqueous layer was extracted with ethyl acetate, and the combined organic layers were dried with sodium sulfate, filtered, and concentrated. The material was purified via column chromatography (RediSep Gold 80 g, gradient elution 0-50% EtOAc:Heptane) to afford 4-iodotetrahydro-2H-pyran (2.67 g, 12.59 mmol, 64.3% yield) as a clear light yellow oil.

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

Reference£º
Patent; Amgen Inc.; Weiss, Matthew; Boezio, Alessandro; Boezio, Christiane; Butler, John R.; Chu-Moyer, Margaret Yuhua; Dimauro, Erin F.; Dineen, Thomas; Graceffa, Russell; Guzman-Perez, Angel; Huang, Hongbing; Kreiman, Charles; La, Daniel; Marx, Isaac E.; Milgrim, Benjamin Charles; Nguyen, Hanh Nho; Peterson, Emily; Romero, Karina; Sparling, Brian; US9212182; (2015); B2;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

693287-79-5, tert-Butyl 2-(tetrahydro-2H-pyran-4-yl)hydrazinecarboxylate is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

693287-79-5, Intermediate 12: tetrahydro-2H-pyran-4-ylhydrazine, trifluoroacetate; Tetrahydro-4H-pyran-4-one (Apollo; 924 muL; 10.0 mmol) and te/f-butyl carbazate (1 .39 g; 10.50 mmol) were dissolved in ethanol (10 mL) and stirred at room temperature overnight. The solvent was removed in vacuo and the residue was redissolved in 1 :1 wate?acetic acid (10 mL) and sodium cyanoborohydride (660 mg; 10.50 mmol) added. The mixture was stirred at room temperature for 3 hours and then 2:1 ethyl acetate: 10% aqueous potassium carbonate (50 mL) added. The organic layer was separated, washed with brine, passed through a hydrophobic frit and the solvent removed in vacuo. The residue was redissolved in DCM (10 mL) and trifluoroacetic acid (1 mL) added and the mixture stirred overnight. The solvent was removed in vacuo to yield Intermediate 12 as a semi-solid slurry which was used directly without any purification. 1H NMR: (DMSOd6, 400MHz) delta 4.08-3.76 (2 H, m), 3.41 -3.27 (2 H, m), 3.23-3.14 (1 H, m), 1 .99-1.83 (2 H, m), 1 .59-1.43 (2 H, m). LC/MS: 1 17 (M+H)+.

693287-79-5 tert-Butyl 2-(tetrahydro-2H-pyran-4-yl)hydrazinecarboxylate 45092245, aTetrahydropyrans compound, is more and more widely used in various.

Reference£º
Patent; MERCK SERONO S.A.; QUATTROPANI, Anna; BAKER-GLENN, Charles; BLACKABY, Wesley; KNIGHT, Chris; WO2010/142628; (2010); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

127956-11-0, Methyl 4-oxotetrahydro-2H-pyran-3-carboxylate is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

The methyl 4-oxotetrahydro-2H-pyran-3-carboxylate(564 mg, 3 . 57 mmol), 4-bromobenzimidamide hydrochloride(1.01 g, 4 . 28 mmol) and potassium carbonate (985.3 mg, 7 . 14 mmol) is added to methanol (40 ml) in, under the protection of nitrogen upto 85 C reaction 4 hours, TLC detection reaction is complete, lowering the temperature to 0 C, white solid precipitated, filtered, the filter cake is dried under vacuum to get the title compound (700 mg, yield 63.6%).

127956-11-0, 127956-11-0 Methyl 4-oxotetrahydro-2H-pyran-3-carboxylate 14666555, aTetrahydropyrans compound, is more and more widely used in various.

Reference£º
Patent; Shandong Xuanzhu Pharmaceutical Technology Co., Ltd.; Wu Yongqian; (20 pag.)CN107286169; (2017); A;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics