m-Chloroperbenzoic acid → 8-benzyloxy-2-[2-methoxy(ethoxymethyl)]-1-methyl-5-oxido-1H-imidazo[4,5-c]quinolin

Participants

Reaction Steps

A modification of the general method described in Part B of Example 3 was followed using 8-benzyloxy-2-[2-methoxy(ethoxymethyl)]-1-methyl-1H-imidazo[4,5-c]quinoline (5.4 g, 14 mmol) in lieu of 7-benzyloxy-2-methyl-1-(2-methylpropyl)-1H-imidazo[4,5-c]quinoline. Dichloromethane (100 mL) was used as the solvent, and after three hours an analysis by TLC indicated the reaction was incomplete. Additional mCPBA (0.5 equivalents) was added, and the reaction was terminated after one additional hour. After the work-up the product was purified by column chromatography on silica gel (eluting with 90:10 dichloromethane:methanol to provide 1.5 g of 8-benzyloxy-2-[2-methoxy(ethoxymethyl)]-1-methyl-5-oxido-1H-imidazo[4,5-c]quinoline as an oil.

Provenance & Evidence