反应详情

N′-{1-[(1-{[(R)-5-(4-Cyano-benzyl)-7-(3,5-dichloro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-cyclopropanecarbonyl)-amino]-cyclopropanecarbonyl}-hydrazinecarboxylic acid tert-butyl ester (0.30 g, 0.42 mmol) was dissolved in 4 N HCl in dioxane (3 mL) and allowed to stir at room temperature for 40 min. The resulting white suspension was diluted with Et2O and the precipitate was collected by filtration. The solid was washed twice with Et2O to give (R)-5-(4-cyano-benzyl)-7-(3,5-dichloro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo-[1,2-a]imidazole-3-carboxylic acid [1-(1-hydrazinocarbonyl-cyclopropylcarbamoyl)-cyclopropyl]-amide hydrochloride (0.15 g, 52%) as a white powder, m/z 621.7 [M+1]+.

1. filtrationthe precipitate was collected by filtration
2. washThe solid was washed twice with Et2O