反应详情

A solution of methyl 3-[(4-methoxy)-tetrahydropyran-4-yl]phenylmethoxy-acetate (Step 1) (0.5 g, 1.7 mmol) and LiOH (0.18 g, 4.25 mmol) in 10% water and methanol (5 mL) was stirred for 6 h at room temperature. The solvents were removed at reduced pressure, and the concentrated residue was partitioned between ethyl acetate (100 mL) and 1 N HCl (30 mL). The organic layer was separated and washed with saturated brine (1×100 mL), dried over magnesium sulfate, filtered and concentrated. The concentrated residue was vacuum dried to give 0.46 g (97%) of 3-[(4-methoxy)-tetrahydropyran-4-yl]phenyl-methoxyacetic acid as a yellow solid: HRMS calcd for C15H20O5 280.1311. Found 280.1304.

1. customThe solvents were removed at reduced pressure
2. customthe concentrated residue was partitioned between ethyl acetate (100 mL) and 1 N HCl (30 mL)
3. customThe organic layer was separated
4. washwashed with saturated brine (1×100 mL)
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customdried