反应详情

2.40 (5.34 mmol) of tert-butyl 3-(tert-butoxycarbonylphenylmethyl)-5-cyano-2-oxo-2,3-dihydrobenzimidazole-1-carboxylate (VIIc) were dissolved in 200 ml of a 2-percent strength trifluoroacetic acid solution in dichloromethane and stirred at room temperature overnight. The solvent and excess trifluoroacetic acid were removed in vacuo, and the residue was taken up in toluene, concentrated in vacuo and dried.

1. customThe solvent and excess trifluoroacetic acid were removed in vacuo
2. concentrationconcentrated in vacuo
3. customdried