Hydrochloric Acid → HCID 23070781, compound

Participants

Reaction Steps

30 ml of 5N hydrochloric acid was added to a 100 ml tetrahydrofuran solution of 5.05 g of t-butyl 4-[4-(t-butyl diphenylsilanyloxymethyl)-1-(2-butynyl)-5-methylsulfanylcarbonimidoyl-1H-imidazol-2-yl]piperazine-1-carboxylate, and the mixture was stirred at room temperature for 22 hours. The solvent was concentrated under reduced pressure. The residue was dissolved in 100 ml of dichloromethane, and 2.05 g of di-t-butyl dicarbonate was added thereto. The solution was made alkaline with 5N sodium hydroxide, and stirred for 2 hours. The organic layer was dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography. Thus, 2.24 g of the title compound was obtained from the fraction eluted with ethyl acetate-hexane (2:3).

Provenance & Evidence