HCID 18668779, compound → HCID 12972793, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 0.63 g of tert-butyl 4-[2-[4-chloro-2-(4-methylthio-phenyl)-1H-imidazo[4,5-c]quinolin-1-yl]ethyl]-1-piperidinecarboxylate in 18 ml of 1,4-dioxane, a solution of 0.38 g of sodium periodate in 6 ml of water was added dropwise, and the mixture was stirred at 50° C. for 13 hours. The reaction solution was concentrated, and the residue was purified by silica gel column chromatography using 1,2-dichloroethane—methanol (10:1) as an eluting solvent to give 0.47 g of a colorless solid. Recrystallization from a mixture of isopropanol and water gave colorless crystals having the melting point of from 183 to 186° C.

Provenance & Evidence