反应详情

650 mg of 10% w/w palladium-on-carbon and 6.1 ml of a 4N solution of hydrogen chloride in dioxane were added to a solution of 6.5 g of dimethyl 1-benzyl-2-methoxymethylimidazole-4,5-dicarboxylate [prepared as described in step (iii) above] in 65 ml of methanol. The mixture was then stirred at room temperature for 1.5 hours under a hydrogen atmosphere. At the end of this time, the catalyst was filtered off and the filtrate was concentrated by evaporation under reduced pressure, to give a crystalline compound. This crystalline compound was washed with ethyl acetate, no give 5.13 g of the hydrochloride of the title compound, melting at 108°-111° C.

1. filtrationAt the end of this time, the catalyst was filtered off
2. concentrationthe filtrate was concentrated by evaporation under reduced pressure
3. customto give a crystalline compound
4. washThis crystalline compound was washed with ethyl acetate