Selenium Dioxide → HCID 69550663, compound

Participants

Reaction Steps

The above 1-benzyl-6,7-dimethoxyisoquinoline-4-carboxylic acid ethyl ester (77.1 mg, 0.22 mmol) was dissolved in 5 ml of acetic acid. Then selenium dioxide (36.6 mg, 1.50 eq) was added and the mixture was refluxed for 1 hr until no more starting material was left. The mixture was evaporated to dryness and the residue was extracted with ethyl acetate and sodium bicarbonate solution. The organic layer was dried over sodium sulfate and then concentrated. The residue was dissolved in 5 ml of ethyl acetate and the solution was passed through a layer of silica gel. The solution was concentrated go give a pure 1-benzoyl-6,7-dimethoxyisoquinoline-4-carboxylic acid ethyl ester (70 mg, 87%).

Provenance & Evidence