Selenium Dioxide → 6-(3-Acetoxy-propoxy)-7-methoxy-1-(3-methoxy-benzoyl)-isoquinoline-4-carbaldehyde

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 6-(3-acetoxy-propoxy)-7-methoxy-1-(3-methoxy-benzyl)-isoquinoline-4-carbaldehyde (20 mg, 0.047 mmol) in acetic acid (1 mL) was added selenium dioxide (16 mg, 1.44 mmol). The reaction mixture was heated at 120° C. for 1 h. The solvent was evaporated and the residue was diluted with dichloromethane (30 mL). The organic layer was washed with saturated sodium bicarbonate solution (20 mL), saturated sodium chloride solution (20 mL), dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo to afford a crude oil. Flash chromatography (Merck Silica gel 60, 70–230 mesh, 40% ethyl acetate/hexane) afforded 6-(3-acetoxy-propoxy)-7-methoxy-1-(3-methoxy-benzoyl)-isoquinoline-4-carbaldehyde as a yellow solid (20 mg, 97% yield).

Provenance & Evidence