1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 91465240, compound

Participants

Reaction Steps

To a solution of Boc-D-tert-leucine (0.69 g) in methylene chloride (15 ml) were added HOBt (0.61 g), WSC (0.86 g) and triethylamine (0.84 ml) under ice-cooling. The reaction mixture was mixed at 0° C. for 2.5 hours. Then, 5-methyl-2-(2-(4-piperidinyl)ethyl)-1,2-dihydroimidazo[1,5-c]imidazol-3-one (0.74 g) obtained in Example 96b) was added thereto, and further mixed at room temperature for 15 hours. The solvent was distilled off under reduced pressure, and the residue was dissolved in ethyl acetate. The ethyl acetate solution was washed with an aqueous sodium hydrogen carbonate solution and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was purified with silica gel column (ethyl acetate/methanol=20/1) to obtain the title compound as colorless powder (0.95 g, 69%).

Provenance & Evidence