反应详情

Into a 100-mL three neck round-bottom flask, which was purged and maintained with an inert atmosphere of nitrogen, was placed a solution of ethyl 4-methyltetrahydro-2H-pyran-4-carboxylate (compound 188.1, 500 mg, 2.90 mmol) in tetrahydrofuran (12 mL). This was followed by the addition of lithium aluminum hydride (221 mg, 5.82 mmol) in portions at 0° C. The reaction mixture was stirred for 1 h at room temperature, then carefully quenched with 1.2 mL of H2O, 1.2 mL of NaOH (15%), 3.5 mL of H2O. The solids were removed by filtration and the filtrate was concentrated under reduced pressure. This resulted in 300 mg (crude) of the title compound as a yellow oil.

1. customInto a 100-mL three neck round-bottom flask, which was purged
2. temperaturemaintained with an inert atmosphere of nitrogen
3. customcarefully quenched with 1.2 mL of H2O, 1.2 mL of NaOH (15%), 3.5 mL of H2O
4. customThe solids were removed by filtration
5. concentrationthe filtrate was concentrated under reduced pressure