反应详情

A solution of 1.3 g of 4-acetyl-1-[(2'-t-butoxycarbonylbiphenyl-4-yl)methyl]-2-butyl-5-cyanoimidazole [prepared as described in step (a) above] in 30 ml of a 4N solution of hydrogen chloride in dioxane was allowed to stand overnight at room temperature, after which it was concentrated by evaporation under reduced pressure. The concentrate was purified by column chromatography through silica gel, using a 10:1 by volume mixture of methylene chloride and methanol as the eluent, to give a colorless amorphous solid. The solid was triturated in hexane, collected by filtration and dried, to give 1.1 g of the title compound, melting at above 55° C. (with softening).

1. concentrationafter which it was concentrated by evaporation under reduced pressure
2. customThe concentrate was purified by column chromatography through silica gel
3. additionby volume mixture of methylene chloride and methanol as the eluent
4. customto give a colorless amorphous solid
5. customThe solid was triturated in hexane
6. filtrationcollected by filtration
7. customdried