With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1768-64-5,4-Chlorotetrahydropyran,as a common compound, the synthetic route is as follows.
Under nitrogen atmosphere, magnesium (6.05 g, 249 mmol) was suspended in THF (30 ml). A catalytic amount of iodine and dibromoethane (0.4 ml) were added. The mixture was heated to 60C and 4-chlorotetrahydro-2H-pyran (5 g, 41.5 mmol) in THF (5 ml) was added dropwise. The mixture was stirred at 60C for 2.5 h. The mixture was cooled to 0C and N-[[5-benzyloxy-l-[2- [tert-butyl(dimethyl)silyl]oxyethyl]-4-oxo-2-pyridyl]methylene]-2-methyl-propane-2- sulfinamide (Intermediate 5, 6.78 g, 13.82 mmol) in THF (20 ml) was added. The resulting mixture was stirred at rt for 45 min. The reaction was quenched with ammonium chloride solution and extracted with EtOAc (2x). The combined organic layers were washed with brine, dried with sodium sulfate and concentrated to afford the title intermediate as an orange gum (8.7 g). Purification by chromatography (Si02, 10% MeOH in DCM) gave the title intermediate as an orange oil (7.3 g, 56 %). MS, ES+ m/z, 577 (M+H)+.
1768-64-5, 1768-64-5 4-Chlorotetrahydropyran 137202, aTetrahydropyrans compound, is more and more widely used in various fields.
Reference£º
Patent; LIEBER INSTITUTE FOR BRAIN DEVELOPMENT; BARROW, James; ERNST, Glen; SWINNEN, Dominique; MONTEL, Florian; DEFAYS, Sabine; (224 pag.)WO2017/91818; (2017); A1;,
Tetrahydropyran – Wikipedia
Tetrahydropyran – an overview | ScienceDirect Topics