1-Hydroxybenzotriazole → Phenylmethyl({4-[(bis{[1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazol-2-yl]methyl}amino)carbonyl]phenyl}methyl)[4-({[(1,1-dimethylethyl)oxy]carbonyl}amino)butyl]carbamate

Participants

Reaction Steps

To a solution of the compound 5 (137 mg) in dichloromethane (3 mL), the compound 2 (131 mg), 1-hydroxybenzotriazole (69 mg), 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide hydrochloride (86 mg) and diisopropylethylamine (105 μl) were added. The reaction mixture was stirred at room temperature for 5 hours. The reaction mixture was added by water and then extracted with dichloromethane. The extract was washed with saturated brine, dried over anhydrous sodium sulfate and then concentrated. The obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=100:0→0:100→dichloromethane:methanol=10:1) to obtain the title compound (225 mg) having the following physical properties.

Provenance & Evidence