反应详情

A mixture of 1-[(2S,3R)-2-benzyloxy-5-(1-naphthyl)-3-pentyl]imidazole-4-carboxylic acid (obtained in Example 30)(55 mg), methanesulfonamide (12.7 mg), 4-dimethylaminopyridine (24.3 mg), and 1-ethyl-3-(3′-dimethylaminopropyl)carbodiimide hydrochloride (51.2 mg) in N,N-dimethylformamide (2 ml) was stirred at room temperature for three days. Ethyl acetate and water were added, and the whole was acidified to pH 3 with hydrochloric acid. The organic layer was dried and evaporated. The residue was purified by column chromatography on silica gel, eluting with a mixture of dichloromethane and methanol (20:1) to give a pale yellow gummy oil of N-methylsulfonyl-1-[(2S,3R)-2-benzyloxy-5-(1-naphthyl)-3-pentyl]imidazole-4-carboxamide (18 mg).

1. customThe organic layer was dried
2. customevaporated
3. customThe residue was purified by column chromatography on silica gel
4. washeluting with a mixture of dichloromethane and methanol (20:1)