Dimethylformamide → HCID 131726614, compound

Participants

Reaction Conditions

Reaction Steps

Slowly add 0.6 mmol of dicyclohexylcarbodiimide to a solution, at 0° C., of 0.5 mmol of the compound of Example 4 and 0.5 mmol of 2-[(tert-butoxycarbonyl)amino]acetic acid in 10 ml of dimethylformamide. The reaction mixture is maintained at 0° C. for 5 hours and then at ambient temperature for 16 hours. After filtration and evaporation under reduced pressure, the residue is dissolved in 2 ml of anhydrous pyridine; 2 ml of acetic anhydride are added, and the mixture is stirred for 48 hours at ambient temperature and in the dark. After concentrating the reaction mixture under reduced pressure, chromatography of the residue over silica gel (dichloromethane) allows the expected product to be isolated.

Provenance & Evidence