反应详情

6-(7-Hydroxy-6,7-dihydro-5H-pyrrolo[1,2-c]imidazole-7-yl)-2-naphthoic acid (449 mg), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide•hydrochloride (321 mg) and 1-hydroxy-1H-benzotriazole•monohydrate (301 mg) were dissolved in DMF (7.6 ml), and diisopropylethylamine (216 mg) was added with stirring under ice cooling. The mixture was allowed to warm to room temperature and stirred for 18 hr. Silica gel (3 g) was added to the reaction mixture and the mixture was concentrated under reduced pressure to dryness. The obtained residue was purified by silica gel column chromatography (developing solution: chloroform/7% aqueous ammonia-containing methanol:19/1). The eluate was concentrated to dryness, and the residue was recrystallized from ethanol to give the title compound (53 mg).

1. stirringstirred for 18 hr
2. additionSilica gel (3 g) was added to the reaction mixture
3. concentrationthe mixture was concentrated under reduced pressure to dryness
4. customThe obtained residue was purified by silica gel column chromatography (developing solution: chloroform/7% aqueous ammonia-containing methanol:19/1)
5. concentrationThe eluate was concentrated to dryness
6. customthe residue was recrystallized from ethanol