Category: 33821-94-2

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

b) (Z)-Phenyl N’-cyano-N-(3,4-difluorophenyl)-N-(3-(tetrahydro-2H-pyran-2-yloxy)propyl)carbamimidate; To a solution of (Z)-phenyl N’-cyano-N-(3,4-difluorophenyl)carbamimidate (286 mg, 1.05 mmol) and 2-(3-bromopropoxy)tetrahydro-2H-pyran (369 mg, 277 muL, 1.57 mmol) in DMF (10.5 mL) was added at room temperature under an athmosphere of nitrogen potassium carbonate (289 mg, 2.09 mmol). The suspension was heated to 85 C. over night. Additional 2-(3-bromopropoxy)tetrahydro-2H-pyran (140 muL, 0.8 mmol) and potassium carbonate (145 mg, 1.05 mmol) was added and the reaction was heated for 5 hours to 85 C. Water was added and the reaction was extracted twice with diethyl ether. The combined organic layers were washed with water and with saturated aqueous sodium chloride solution, dried over sodium sulfate, filtered and the solvent was evaporated under reduced pressure. The title compound was obtained as a light yellow viscous oil (202 mg, 46%) after column chromatography on silica gel using a gradient of heptane/ethyl acetate 4:1 to 1:1 (v/v) as eluent.MS ISP (m/e): 332.1 (100) [(M-THP+H)+], 416.3 (5) [(M+H)+].1H NMR (DMSO-D6, 300 MHz): delta (ppm)=7.38 (t, 2H), 7.26-7.16 (m, 3H), 7.05 (m, 3H), 4.52 (t, 1H), 3.97 (t, 2H), 3.85 (m, 2H), 3.48 (m, 2H), 2.00 (pent, 2H), 1.79 (m, 1H), 1.68 (m, 1H), 1.55 (m, 4H)).

33821-94-2, The synthetic route of 33821-94-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Baumann, Karlheinz; Goetschi, Erwin; Green, Luke; Jolidon, Synese; Knust, Henner; Limberg, Anja; Luebbers, Thomas; Thomas, Andrew; US2011/190269; (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.33821-94-2,2-(3-Bromopropoxy)tetrahydro-2H-pyran,as a common compound, the synthetic route is as follows.

Cesium carbonate 288 mg (0.884 mmol) and 2-(3-bromopropoxy)tetrahydropyran 0.120 mL (0.708 mmol) were added to a DMF (4 mL) solution of 1-(5-bromopyrimidin-2-yl)piperidin-4-one oxime 120 mg (0.443 mmol) synthesized in the same manner as in Reference Example 66, and the mixture was stirred at 80C for 9 hours. After the completion of the reaction, water was added to the reaction mixture, and followed by extraction with ethyl acetate. The organic layer was washed with water, dried over anhydrous sodium sulfate, and filtered. The filtrate was concentrated under reduced pressure. The concentrated residue was purified by silica gel column chromatography (eluting solvent: hexane:ethyl acetate) to give the title compound 143 mg (0.346 mmol, yield 78%) as a colorless oil. Mass spectrum (CI, m/z):413, 415[M+1]+. 1H-NMR spectrum (400MHz, DMSO-d6) delta:8.48 (s, 2H), 4.59 – 4.49 (m, 1H), 4.08 – 3.98 (m, 2H), 3.88 – 3.60 (m, 6H), 3.48 – 3.36 (m, 2H), 2.58 – 2.50 (m, 2H), 2.38 – 2.30 (m, 2H), 1.93 – 1.77 (m, 2H), 1.75 – 1.32 (m, 6H).

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

Reference£º
Patent; UBE Industries, Ltd.; KOMORI, Ken-ichi; NINOMIYA, Akishi; USHIYAMA, Shigeru; SHINOHARA, Masaru; ITO, Koji; KAWAGUCHI, Tetsuo; TOKUNAGA, Yasunori; KAWADA, Hiroyoshi; YAMADA, Haruka; SHIRAISHI, Yusuke; KOJIMA, Masahiro; ITO, Masaaki; KIMURA, Tomio; (432 pag.)EP3333163; (2018); 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

To a solution of (Z)-phenyl N’-cyano-N-(3,4-difluorophenyl)carbamimidate (286 mg, 1.05 mmol) and 2-(3-bromopropoxy)tetrahydro-2H-pyran (369 mg, 277 mu, 1.57 mmol) in DMF (10.5 mL) was added at room temperature under an atmosphere of nitrogen potassium carbonate (289 mg, 2.09 mmol). The suspension was heated to 85 C over night. Additional 2-(3- bromopropoxy)tetrahydro-2H-pyran (140 mu,, 0.8mmol) and potassium carbonate (145 mg, 1.05 mmol) were added and the reaction was heated for 5 hours to 85 C. Water was added and the reaction was extracted twice with diethyl ether. The combined organic layers were washed with water and with saturated aqueous sodium chloride solution, dried over sodium sulfate, filtered and the solvent was evaporated under reduced pressure. The title compound was obtained as a light yellow viscous oil (202 mg, 46%) after column chromatography on silica gel using a gradient of heptane/ethyl acetate 4: 1 to 1 : 1 (v/v) as eluent.MS ISP (m/e): 332.1 (100) [(M-THP+H)+], 416.3 (5) [(M+H)+].1H NMR (DMSO-D6, 300 MHz): delta (ppm) = 7.38 (t, 2H), 7.26 – 7.16 (m, 3H), 7.05 (m, 3H), 4.52 (t, 1H), 3.97 (t, 2H), 3.85 (m, 2H), 3.48 (m, 2H), 2.00 (pent, 2H), 1.79 (m, 1H), 1.68 (m, 1H), 1.55 (m, 4H)).

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

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; BAUMANN, Karlheinz; FLOHR, Alexander; GOETSCHI, Erwin; GREEN, Luke; JOLIDON, Synese; KNUST, Henner; LIMBERG, Anja; LUEBBERS, Thomas; THOMAS, Andrew; WO2011/101304; (2011); A2;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics