Tag: M.W:100-200

25637-16-5, 4-Bromotetrahydropyran is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Magnesium (86.5 mg, 3.60 mmol) was stirred vigorously under nitrogen for 30 min. THF (2 mL) and dibromoethane (2 drops) were added and the reaction mixture was warmed to 50 C. A solution of 4-bromotetrahydropyran (495 mg, 3.00 mmol) in THF (4 mL) was added drop-wise over 5 min and the reaction mixture was heated at reflux for 2 h. A solution of 3-chloro-4-pyridaldehyde (170 mg, 1.20 mmol) in THF (4 mL) was added drop-wise over 5 min and the reaction mixture was heated at reflux for 6 h, stirred at room temperature overnight and heated at reflux for 8 h. The reaction mixture was cooled to 0 C. and quenched with sat aq NH4Cl (10 mL). The reaction mixture was diluted with EtOAc (40 mL) and the aqueous fraction was extracted with EtOAc (3*40 mL). The combined organic fractions were washed with sat aq Na2CO3 (20 mL), dried (MgSO4) and concentrated in vacuo. The residue was purified by normal phase column chromatography to give the crude title compound as a pale yellow gum (69.0 mg, 25%). LCMS (ES+): 228.2 (M+H)+.

25637-16-5, The synthetic route of 25637-16-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PROXIMAGEN LIMITED; Evans, David; Carley, Allison; Stewart, Alison; Higginbottom, Michael; Savory, Edward; Simpson, Iain; Nilsson, Marianne; Haraldsson, Martin; Nordling, Erik; Koolmeister, Tobias; US2013/102587; (2013); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

344329-76-6, Tetrahydro-2H-pyran-4-carboxamide is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 32 A solution of Example B5 (113 mg, 0.871 mmol) in DCE (3 mL) was treated with oxalyl chloride (111 mg, 0.871 mmol), heated at 80¡ã C. for 45 min, cooled to RT, treated with a solution of DIEA (323 mg, 2.497 mmol) and Example A10 (150 mg, 0.581 mmol) in dioxane (4.50 mL) and stirred at RT for 3 h. The mixture was treated with EtOAc, washed successively with satd. NaHCO3, 1N NaOH, then brine, dried over Na2SO4, concentrated to dryness and purified via reverse-phase chromatography (MeCN/H2O with 0.1percent TFA). The organics were removed under reduced pressure and the aqueous residue was treated with satd. NaHCO3, extracted with EtOAc (3*) and the combined organics were washed with brine, dried over Na2SO4 and concentrated to dryness to afford N-((5-((2-propionamidopyridin-4-yl)oxy)pyridin-2-yl)carbamoyl)tetrahydro-2H-pyran-4-carboxamide (35 mg, 13percent). 1H NMR (400 MHz, DMSO-d6): delta 11.06 (s, 1H), 10.88 (s, 1H), 10.50 (s, 1H), 8.25 (d, J=2.9 Hz, 1H), 8.18 (d, J=5.7 Hz, 1H), 8.08 (d, J=9.0 Hz, 1H), 7.73 (dd, J=9.0, 2.9 Hz, 1H), 7.65 (d, J=2.4 Hz, 1H), 6.70 (dd, J=5.7, 2.4 Hz, 1H), 3.88 (d, J=11.3 Hz, 2H), 2.69-2.66 (m, 1H), 2.49 (m, 2H), 2.33 (q, J=7.5 Hz, 2H), 1.72 (d, J=13.1 Hz, 2H), 1.62-1.60 (m, 2H), 0.99 (t, J=7.5 Hz, 3H); MS (ESI) m/z: 414.2 (M+H+).

344329-76-6, 344329-76-6 Tetrahydro-2H-pyran-4-carboxamide 13197203, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; Deciphera Pharmaceuticals, LLC; Flynn, Daniel L.; Caldwell, Timothy Malcolm; Samarakoon, Thiwanka; Vogeti, Lakshminarayana; Kaufman, Michael D.; Patt, William C.; Ahn, YuMi; US2014/275016; (2014); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

10521-08-1, 2H-Pyran-2,4,6(3H,5H)-trione is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

acetonedicarboxylic acid anhydride (31.4 kg) was added to methanol (100 L) cooled to 5 C. upon vigorous stirring. The resulting solution was kept at ambient temperature for 45 min to ensure that formation of acetone dicarboxylic acid monomethyl ester was complete.

10521-08-1, As the paragraph descriping shows that 10521-08-1 is playing an increasingly important role.

Reference£º
Patent; Cody Laboratories, Inc.; US7855296; (2010); B1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

5631-96-9, 2-(2-Chloroethoxy)tetrahydro-2H-pyran is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To the above THP ether solution(1 mmol)in methanol (10 mL),5 mol % bismuth trichloridewas added. The reaction mixture was stirred forappropriate time as provided in Table 1 at roomtemperature. The reaction was monitored by TLC.After completion of the reaction water was added tothe reaction mixture and the product was extractedwith ethyl acetate (3×25 mL). Later the combinedorganic layer was washed with brine, dried overanhydrous sodium sulphate and concentrated invacuum to give a crude mass, which was purifedover silica gel column to afford parent alcohol inquantitative yield., 5631-96-9

5631-96-9 2-(2-Chloroethoxy)tetrahydro-2H-pyran 254951, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Article; Vijaya Durga; Balamurali Krishna; Baby Ramana; Santha Kumari; Vijay; Hari Babu; Oriental Journal of Chemistry; vol. 33; 2; (2017); p. 1030 – 1034;,
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

A mixture of 2,2-dimethyltetrahydropyran-4-one 1 (1.3 g, 0.01 mol)[8], furfural (1.0 g, 0.01 mol), ethyl cyanoacetic acid (1.1 g,0.01 mol), and ammonium acetate (6.2 g, 0.08 mol) in 30 mL of absolute ethanol was boiled with stirring for 6 h. After cooling, the crystals were filtered off, washed with water, diethyl ether, dried and recrystallized from ethanol. Yield 1.3 g (49 %), mp 289-290 C. IR spectrum, nu, cm-1: 3300, 3150, 3050 (N-H, C-H), 2240 (C?N), 1650 (C=O). 1H NMR spectrum, delta, ppm: 1.29 s (6H, 2CH3), 2.54 br. s(2H, CH2), 4.55 br. s (2H, OCH2), 6.68 d. d (1H, H4furan,J = 3.6, 1.7 Hz), 7.24 br. d (1H, H3furan, J= 3.6 Hz), 7.80 d.d (1H, H5furan, J = 1.7, 0.6 Hz), 12.46 br. s (1H, NH). 13C NMR spectrum, delta, ppm: 25.8, 37.3, 59.5, 68.8, 103.6, 108.0, 111.8, 115.6, 115.8, 143.7, 144.8, 146.1, 146.4, 159.9. Found, % C 66.59; H 5.31; N 10.32. C15H14N2O3. Calculated, %: C 66.66; H 5.22; N 10.36., 1194-16-7

As the paragraph descriping shows that 1194-16-7 is playing an increasingly important role.

Reference£º
Article; Dabaeva; Baghdasaryan; Paronikyan; Tamazyan; Ayvazyan; Dashyan, Sh. Sh.; Russian Journal of General Chemistry; vol. 89; 12; (2019); p. 2364 – 2368; Zh. Obshch. Khim.; vol. 89; 12; (2019); p. 1842 – 1847,6;,
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,29943-42-8

Step 1 Methylmagnesium bromide (3.66 mL, 10.99 mmol) was added dropwise via syringe to a solution of dihydro-2H-pyran-4(3H)-one (1 g, 9.99 mmol) in Diethyl ether (50 mL) at 0 C. and stirred at this temp for 1 hr before warming up to RT. The reaction was quenched with sat. ammonium chloride and extracted with ether. The organic layer was washed with brine, collected, dried over MgSO4, filtered and evaporated to give the crude product 4-methyltetrahydro-2H-pyran-4-ol (1 g, 86% yield) as an oil. 1H NMR (400 MHz, CHLOROFORM-d) delta 3.82-3.73 (m, 2H), 3.73-3.66 (m, 2H), 1.74-1.64 (m, 3H), 1.54 (ddt, J=13.7, 4.6, 2.1 Hz, 2H), 1.41 (br. s, 1H), 1.28 (s, 3H).

29943-42-8 Dihydro-2H-pyran-4(3H)-one 121599, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; Bristol-Myers Squibb Company; Hiebert, Sheldon; Rajamani, Ramkumar; Sun, Li-Qiang; Mull, Eric; Gillis, Eric P.; Bowsher, Michael S.; Zhao, Qian; Meanwell, Nicholas A.; Renduchintala, Kishore V.; Sarkunam, Kandhasamy; Nagalakshmi, Pulicharla; Babu, P. V. K. Suresh; Scola, Paul Michael; US2013/115190; (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.2081-44-9,Tetrahydro-2H-pyran-4-ol,as a common compound, the synthetic route is as follows.

A flask was charged with 4-hydroxytetrahydropyran (3.00 g, 29.4 mmol), Methanesulfonyl chloride (2.39mL, 30.9 mmol), triethylamine (8.20 mL, 58.8 mmol), and CH2Cl2. The resulting mixture was stirred overnight at room temperature. The reaction mixture was then washed with saturated aqueous NaHCO3 (100 mL) and water (100 mL), dried over Na2SO4, filtered and concentrated under reducedpressure. The crude product thus obtained was used without further purification.

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; ChemoCentryx, Inc.; Fan, Junfa; Krasinski, Antoni; Lange, Christopher W.; Lui, Rebecca M.; McMahon, Jeffrey P.; Powers, Jay P.; Zeng, Yibin; Zhang, Penglie; US2014/154179; (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.4295-99-2,4-Cyanotetrahydro-4H-pyran,as a common compound, the synthetic route is as follows.

Example 43 (Synthesis of 4-aminomethyltetrahydropyran) In an autoclave made of stainless equipped with a stirring device, a thermometer and a pressure gauge and having an inner volume of 200 ml were charged 10.0 g (90.0 mmol) of 4-cyanotetrahydropyran, 50.0 g of 22% by weight ammonia-methanol solution and 2.0 g (17.0 mmol in terms of a nickel atom) of developed Raney nickel (available from Nikki Chemical Co., Ltd.; sponge nickel N154D), and the mixture was reacted under hydrogen atmosphere (0.51 to 0.61MPa) at 45 to 55C for 17 hours under stirring. After completion of the reaction, insoluble materials were filtered, and the filtrated material was washed with 30 ml of methanol. The filtrate and the washed solution were combined and concentrated under reduced pressure, and then, the concentrate was distilled under reduced pressure (73 to 74C, 2.67 kPa) to tive 7.94 g (Isolation yield; 76.6%) of 4-aminomethyltetrahydropyran as colorless liquid. Physical properties of the 4-aminomethyltetrahydropyran are as follows. 1H-NMR (DMSO-d6, delta (ppm)); 1.02 to 1.16 (2H, m), 1.10 to 1.50 (2H, brs), 1.34 to 1.45 (1H, m), 1.56 to 1.61 (2H, m), 2.39 (2H, d, J=6.3Hz), 3.20 to 3.29 (2H, m), 3.81 to 3.86 (2H, m) CI-MS (m/e); 116 (M+1), 99 Example 45 (Synthesis of 4-aminomethyltetrahydropyran) In an autoclave made of stainless equipped with a stirring device, a thermometer and a pressure gauge and having an inner volume of 200 ml were charged 10.0 g (90.0 mmol) of 4-cyanotetrahydropyran, 100 ml of 22% by weight ammonia methanol solution and 2.0 g (17.0 mmol in terms of a nickel atom) of developed Raney nickel (available from Nikki Chemical Co., Ltd.; sponge nickel N154D), and the mixture was reacted under hydrogen atmosphere (0.51 to 0.61MPa) at 50 to 60C for 5 hours under stirring. After completion of the reaction, insoluble materials were filtered, the filtered material was washed with 30 ml of methanol, and the filtrate and the washed solution were combined. When this solution was analyzed by gas chromatography (Internal standard method), 8.84 g (Reaction yield: 85.3%) of 4-aminomethyltetrahydropyran was found to be formed. Incidentally, bis(4-tetrahydropyranylmethyl)amine which is a by-product was not formed., 4295-99-2

As the paragraph descriping shows that 4295-99-2 is playing an increasingly important role.

Reference£º
Patent; Ube Industries, Ltd.; EP1671937; (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.2081-44-9,Tetrahydro-2H-pyran-4-ol,as a common compound, the synthetic route is as follows.

To a solution of tetrahydro-2H-pyran-4-ol (4 mL, 41.11 mmol) in DCM (60 mL) was added TEA (9 mL, 63.9 mmol) at 0. After stirring 5 min, methanesulfonyl chloride (3.5 mL, 45 mmol) was added slowly to the mixture. The resulting mixture was stirred for 1 h and warmed to rt, and then further stirred overnight. The reaction mixture was diluted with water (50 mL) . The resulting mixture was extracted with DCM (100 mL ¡Á 3) . The combined organic layers were dried over anhydrous Na2SO4and concentrated in vacuo to give a light yellow solid product (7 g, 94.5) .[1586]MS (ESI, pos. ion) m/z: no response.

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; SUNSHINE LAKE PHARMA CO., LTD.; LIU, Bing; ZHANG, Yingjun; CHENG, Changchung; HUANG, Jiuzhong; BAI, Shun; REN, Xingye; LI, Zhi; ZHOU, Youbai; (368 pag.)WO2016/615; (2016); 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 three-necked flask equipped with an addition funnel, thermometer pocket, drying tube and a mechanical stirrer, was charged with toluene (400 ml), (S)-(-)-phenylethylamine(142.35 g,1.1764 mole), and 4-dimethylaminopyridine (0.7176 g, 0.0059 mole). The mixture was cooled to a temperature of -10C to -15C, followed by addition of a solution of 3-isobutyl glutaric anhydride (100 g, 0.59 mole) [e.g. obtained in accordance with the process disclosed Drugs of the Future, 24 (8), 862-870 (1999) or according to Example 1 step (A) above] in toluene (100 ml), over a period of 45-60 minutes, and stirring for additional 1.5-2 hours, at a temperature of -10C to -15C. The mixture was then extracted with 10% aqueous solution of NaOH (500 ml), and the aqueous phase was washed with toluene (1×250 ml). The pH of the aqueous phase was adjusted to 2-2.5 by adding a solution of hydrochloric acid (1-12N). The aqueous phase was further extracted with toluene (1x 800 ml) at a temperature of 70-80C. The toluene layer was washed with 10% sodium chloride solution {700ml) at a temperature of 70-80C followed by crystallization to get 125 g (73.0% yield) of a white solid of (3S)-5-methyl-3-(2-oxo-2-{[(1S)-1-phenylethyljamino}ethyl) hexanoic acid with an optical purity of 99.75 %, as measured by chiral HPLC., 185815-59-2

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

Reference£º
Patent; TEVA PHARMACEUTICALS INTERNATIONAL GMBH; JANAGANI, Satyanarayana; (38 pag.)WO2017/19791; (2017); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics