Tag: M.W:100-200

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.14774-37-9,Tetrahydropyran-4-methanol,as a common compound, the synthetic route is as follows.,14774-37-9

I: Toluene-4-sulfonic acid tetrahydropyran-4-ylmethyl ester Intermediate p-Toluenesulfonyl chloride (29.8 g, 157 mmol) was added portionwise to a mixture of tetrahydro-2H-pyran-4-yl-methanol (20.0 g, 172 mmol) and pyridine (25.2 ml, 313 mmol) in dichloromethane (200 ml). The mixture was stirred at room temperature for 17 h, then quenched with aqueous hydrochloric acid (2 M; 100 ml). The layers were separated and the aqueous layer extracted 2 with dichloromethane (2*100 ml). The organic layers were combined and concentrated in vacuo. Recrystallisation from dichloromethane:n-heptane (5:1) afforded toluene-4-sulfonic acid tetrahydro-pyran-4-ylmethyl ester. The mother liquors were further purified by silica gel column chromatography eluding with 50% dichloromethane in n-heptane to yield a further quantity of toluene-4-sulfonic acid tetrahydropyran-4-ylmethyl ester (total yield 41.6 g, 154 mmol).

As the paragraph descriping shows that 14774-37-9 is playing an increasingly important role.

Reference£º
Patent; N.V. Organon; US2008/207598; (2008); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics

7525-64-6, 4-Methyltetrahydro-2H-pyran-4-ol is a Tetrahydropyrans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

7525-64-6, At 0C, pyridine (1.81 mL, 22.5 mmol) was added dropwise to a suspension of 4- methyltetrahydropyran-4-ol (1.74g, 15mmol) and 2-bromo-2,2-difluoro-acetyl chloride (3.3 g, 17 mmol) in ACN (13 mL). The mixture was then warmed to rt, stirred for 30 minutes and concentrated. The residue was triturated with heptane and filtered. The filtrate was concentrated to give (8a) as yellow oil (1.9 g, 7 mmol, 45%).

As the paragraph descriping shows that 7525-64-6 is playing an increasingly important role.

Reference£º
Patent; MUTABILIS; BARBION, Julien; CARAVANO, Audrey; CHASSET, Sophie; CHEVREUIL, Francis; LEDOUSSAL, Benoit; LE STRAT, Frederic; MOREAU, Francois; QUERNIN, Marie-Helene; WAECKEL, Ludovic; SIMON, Christophe; OLIVEIRA, Chrystelle; (91 pag.)WO2018/141991; (2018); 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.116131-44-3,3-(Bromomethyl)tetrahydro-2H-pyran,as a common compound, the synthetic route is as follows.

In a 200 ml-capacity glass flask equipped with a stirring device, a thermometer, a reflux condenser and a dropping funnel, 11.39 g (47.8 mmol) of potassium 3-amino-N-(furan-2-yl)benzenesulfonamide, potassium carbonate 6.93 g (50. lmmol) and 60 ml of hydrazine, N-dimethylformamide were added under a nitrogen atmosphere. While stirring at room temperature, 8.99 g (50.2 mmol) of 3-methylbromo-tetrahydropyran was added, and the mixture was reacted at 70 to 80 C for 3 to 4 hours. After the reaction was completed, the mixture was cooled to room temperature, and then 200 ml of toluene was added. After washing twice with water (180 ml), it was dried over magnesium sulfate. After filtration, it was concentrated under reduced pressure. Then, the obtained yellow oil was purified by silica gel column chromatography (packing material: Wakogel C-200, eluent: hexane / ethyl acetate = 1/2 (volume ratio)). N-(furan-2-yl)-3-(((tetrahydro-2H-pyran-3-yl)methyl)amino)benzenesulfonamide 11.90 g (yield 74%), purity 99% Amino solids by area fraction of high performance liquid chromatography).

116131-44-3, 116131-44-3 3-(Bromomethyl)tetrahydro-2H-pyran 22617257, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; Liu Shuangwei; (6 pag.)CN108003144; (2018); 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.220641-87-2,N-Methyltetrahydro-2H-pyran-4-amine,as a common compound, the synthetic route is as follows.

N-Methyltetrahydro-2H-pyran-4-amine (19 mg,(bromomethyl)phenyl)boronic acid (23.60 mg, 0.111 mmol) were suspended in15 acetonitrile (2 mL). K2C03 (37.9 mg, 0.275 mmol) was added, then the reaction mixture was stirred at room temperature for lOh. The reaction mixture was concentrated, dioxane (1 mL) and water (0.5 mL), phosphoric acid, potassium salt (46.6 mg, 0.22 mmol) and 7- bromo-5 -(1 -(tetrahydro-2H-pyran-4-yl)- 1 H- 1,2,3 -triazol-5 -yl)pyrrolo[2, 1 -f] [1 ,2,4]triazin- 4-amine (20 mg, 0.055 mmol) (Intermediate Ri) were added to the residue. The reaction20 vessel was evacuated, backfilled with N2 and then degassed by bubbling N2 while being sonicated. Tetrakis triphenylphosphine (7 mg, 5.49 .imol) was added and the degassing process was repeated. The reaction mixture was heated at 140 C in a microwave for 45 mm. The reaction complex was filtered, washed with water and extracted with ethyl acetate (10 mL x 3). The organic layers were combined, dried and concentrated. The25 crude mixture was purified by preparative LC method C to provide 7-(3-((methyl (tetrahydro-2H-pyran-4-yl)amino)methyl)phenyl)-5 -(1 -(tetrahydro-2H-pyran-4-yl)- 1 H- 1 ,2,3-triazol-5-yl)pyrrolo[2, 1 -f] [1 ,2,4]triazin-4-amine (8.2 mg, 41% yield). LC/MS(M+H) = 489.30. ?HNMR(500 MHz, MeOD) 5 1.72 (m, 2H), 1.85 (m, 2H), 2.01 (m,2H), 2.29 (s, 3H), 2.42 (m, 2H), 2.75 (m, 1H), 3.42 (m, 2H), 3.47 (m, 2H), 3.73 (s, 2H),4.06 (m, 4H), 4.56 (m, 1H), 6.97 (s, 1H), 7.37 (d, 2H), 7.47 (t, 1H), 7.84 (s, 1H), 7.95 (m,2H), 8.01 (s, 1H).

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

Reference£º
Patent; BRISTOL-MYERS SQUIBB COMPANY; BHIDE, Rajeev S.; BATT, Douglas G.; CHERNEY, Robert J.; CORNELIUS, Lyndon A.M.; LIU, Qingjie; MARCOUX, David; NEELS, James; POSS, Michael A.; QIN, Lan-ying; RUAN, Zheming; SHI, Qing; SRIVASTAVA, Anurag S.; TINO, Joseph A.; WATTERSON, Scott Hunter; (532 pag.)WO2016/64957; (2016); 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.110238-91-0,Methyl tetrahydro-2H-pyran-4-carboxylate,as a common compound, the synthetic route is as follows.

Ammonium hydroxide (1 L) was added to a solution of methyl tetrahydropyranyl acetate (20 mL, 150 mmol) in methanol (500 mL), and the reaction was stirred overnight at ambient temperature. Additional ammonium hydroxide (500 mL) was added, and the reaction was stirred for four additional days. The methanol was removed under reduced pressure. Solid sodium chloride was added to the aqueous layer, which was extracted with chloroform (3 x 150 mL). The combined extracts were dried over sodium sulfate, filtered, and concentrated under reduced pressure to provide 11.4 g of tetrahydropyran-4- carboxamide as a white solid., 110238-91-0

The synthetic route of 110238-91-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; 3M INNOVATIVE PROPERTIES COMPANY; WO2004/58759; (2004); 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

Example 1D 5-amino-2H-pyran-3(6H)-one The crude product from Example 1C (33 g) was treated with ethanol (800 mL) and concentrated sulfuric acid (0.2 mL), heated to reflux for 2 hours, cooled to 0 C., treated with methanol saturated with ammonia (200 mL), stirred at ambient temperature for 4 hours and concentrated. The residue was purified by flash chromatography over silica gel (2% and then 5% and then 10% methanol/methylene chloride) to provide the title compound (5 g). MS (DCI/NH3)m/z 114 (M+H)+, 131 (M+NH4)+; 1H NMR (DMSO-d6) delta3.80 (s, 2H), 4.19 (s, 2H), 5.01 (s, 1H), 7.01 (bs, 2H)., 61363-56-2

61363-56-2 2H-Pyran-3,5(4H,6H)-dione 325287, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; Altenbach, Robert J.; Rotert, Gary A.; Carroll, William A.; Gopalakrishnan, Murali; Molinari, Eduardo Jose Vicente; Davis-Taber, Rachel A.; Scott, Victoria Eleanor Sarah; US2003/65182; (2003); 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.14774-36-8,(Tetrahydropyran-3-yl)methanol,as a common compound, the synthetic route is as follows.

Intermediate 13: 3-(Bromomethyl)tetrahvdro-2H-pyranTo tetrahydro-2H-pyran-3-ylmethanol (1g) in dry dichloromethane (28 ml) at 0C and under nitrogen, was added triethylamine (2.7 ml) in one go, followed by methanesulphonyl chloride (0.87 ml) dropwise over 1 minute. The reaction was allowed to warm to room temperature and left at this temperature overnight. The reaction mixture was diluted with dichloromethane (20 ml) and washed with saturated aqueous sodium bicarbonate (20 ml). The organic layer was passed through a hydrophobic frit to dry and concentrated in vacuo to yield a yellow oil., 14774-36-8

14774-36-8 (Tetrahydropyran-3-yl)methanol 85769, aTetrahydropyrans compound, is more and more widely used in various fields.

Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2008/101867; (2008); 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.14774-37-9,Tetrahydropyran-4-methanol,as a common compound, the synthetic route is as follows.

Step 2: Synthesis of compound B3Prepared as described by adaptation of the following literature reference: Radziszewski, J.G. et al. J. Am. Chem. Soc. 1993, 115, 8401.To a solution of 97 g (810 mmol) of compound B2 in 2-methyltetrahydrofuran (190 mL) are added 165 mL of 50% aqueous NaOH solution. To this stirred suspension is added dropwise with cooling a solution of p-toluene-sulfonylchloride (283 g, 1.46 mol) in 2-methyltetrahydrofuran (280 mL). The reaction is stirred at 30-35 C for 18 h. The suspension is poured into a mixture of ice- water (280 mL) and aqueous HC1 solution (37%, 203 mL). After addition of methylcyclohexane (1.4 L) and further ice-water (0.2 L), the reaction mixture is stirred for 2 h in an ice-bath. The resulting crystalline precipitate is isolated by filtration and washed with methylcyclohexane (0.5 L) and water (0.5 L). Drying under reduced pressure at 40 C gave 216 g of compound B3 as white crystalline solid. Yield: 99%, ES-MS: m/z 271 [M+H]; ]H NMR (400 MHz, CHLOROFORM-d) delta ppm 1.19 – 1.35 (2 H, m), 1.54 – 1.63 (2 H, m), 1.85 – 2.02 (1 H, m), 2.45 (3 H, s), 3.28 – 3.39 (2 H, m), 3.86 (2H, d, J=6.60 Hz), 3.93 (2 H, dd, J=11.37, 4.52 Hz), 7.35 (2 H, d, J=9.29 Hz), 7.78 (2 H, d, J=8.31 Hz), 14774-37-9

The synthetic route of 14774-37-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; RIETHER, Doris; ZINDELL, Renee, M.; ERMANN, Monika; WO2011/109324; (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.103260-44-2,Ethyl 2-(tetrahydro-2H-pyran-4-yl)acetate,as a common compound, the synthetic route is as follows.

Preparatory Example 33 4-Tetrahydropyranylacetic acid STR234 20 ml of methanol, 10 ml of water and 1 g of sodium hydroxide were added to 0.9 g of ethyl 4-tetrahydropyranylacetate and agitated at 80¡ã C. for 1 hour. The solvent was removed by distillation, to which water was added. After washing with ethyl acetate, a hydrochloric acid aqueous solution was added to the resultant aqueous phase to an extent of pH of 3, followed by extraction with chloroform under salting-out conditions and drying with anhydrous magnesium sulfate. This was removed by filtration and the solvent was distilled off, thereby obtaining 0.87 g of a crude intended compound. 1 H-NMR(CDCl3) delta:1.0-2.4(m,5H), 2.28(bd,J=6.5 Hz,2H), 3.37(td,J=11.5 Hz,2.9 Hz,2H), 3.7-4.1(m,2H), 7.85(bs,1H), 103260-44-2

As the paragraph descriping shows that 103260-44-2 is playing an increasingly important role.

Reference£º
Patent; Eisai Co., Ltd.; US5221671; (1993); A;,
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

To a solution of tetrahydro-2H-pyran-4-ol (20 g ) in tetrahydrofuran (150 mL) and triethylamine (28.5 mL) is slowly added methanesulfonyl chloride (15.5 mL), while keeping the temperature below 30C. The mixture is stirred for 1 2 hours at room temperature. The precipitate is filtered off and washed twice with tetrahydrofuran. The combined organic phases are concentrated and partitioned between ethyl acetate and water. The organic phase is dried (Na2SO4) and concentrated to give the title compound. Yield: 29.4 g; TLC: rf = 0.36 (silicagel, petrole ether/ethyl acetate 1 :1 ); Mass spectrum (ESI+): m/z = 198 [M+NH4]+., 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; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; ECKHARDT, Matthias; FRATTINI, Sara; HAMPRECHT, Dieter; HIMMELSBACH, Frank; LANGKOPF, Elke; LINGARD, Iain; PETERS, Stefan; WAGNER, Holger; WO2013/144097; (2013); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics