3,4-dihydro-2H-pyran → 2-Fluoro-6-hydroxy-4-(tetrahydro-2H-pyran-2-yloxy)benzaldehyde

Participants

Reaction Steps

To a mixture of 2-fluoro-4,6-dihydroxybenzaldehyde (3.12 g, 20.0 mmol) and PPTS (0.51 g, 2.0 mmol) in dichloromethane (100 mL) was added dropwise DHP (3.02 g, 36.0 mmol). The mixture was stirred at room temperature overnight and concentrated under reduced pressure. The residue was purified by column chromatography (EtOAc/PE=1/15) on silica gel to give the title compounds as a colorless oil (3.99 g, Yield: 83.2%). MS (ESI) m/z=241 [M+H]+.

Provenance & Evidence