Pyridine → 3-Chloro-2-formyl-5-(tetrahydro-2H-pyran-2-yloxy)phenyl trifluoromethanesulfonate

Participants

Reaction Conditions

Reaction Steps

To a mixture of 6-chloro-2-hydroxy-4-(tetrahydro-pyran-2-yloxy)benzaldehyde (10.5 g, 40.9 mmol) and pyridine (14.6 mL, 0.20 mol) in DCM (150 mL) cooled at −10˜0° C. was added Tf2O (10.3 mL, 61.2 mmol) dropwise. The reaction mixture was stirred at 0° C. for an additional 2 h and quenched with cold brine (40 mL). The resulting mixture was extracted with EtOAc (2×50 mL). The combined organic layers were dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography on silica gel (EtOAc: PE=1:200) to give the title compound as a yellow oil (10.5 g. Yield: 66%).

Provenance & Evidence