1-Hydroxybenzotriazole → HCID 70049354, compound

Participants

Reaction Steps

To a mixture of glycine benzyl ester p-toluene-sulfonate (66 mg) and 3(RS)-[(4-carboxyphenylcarbonyl)-L-valyl-L-prolyl]amino-1,1,1-trifluoro-4-methyl-2-oxopentane (100 mg) in DMF (6 ml) were added HOBT (26 mg) and WSCD (30 mg) under ice-bath cooling. After being stirred at room temperature for 4 hours, the mixture was concentrated under reduced pressure. The residue was dissolved in ethyl acetate (30 ml) and washed with 5% aqueous citric acid (20 ml), water (20 ml), 5% aqueous sodium bicarbonate (20 ml) and brine (20 ml). The solution was dried over magnesium sulfate and evaporated under reduced pressure to give 3(RS)-[[4-[(benzyloxycarbonyl)methylaminocarbonyl]-phenylcarbonyl]-L-valyl-L-prolyl]amino-1,1,1-trifluoro-4-methyl-2-oxopentane (125 mg).

Provenance & Evidence