Benzyloxycarbonylglycine → HCID 86757303, compound

Participants

Reaction Steps

A mixture of 0.257 g of 2(R)-[1(S)-(tert-butoxycarbonyl)-4-phenylbutyl]-4-methyl-N-[2,4-dioxo-1,3,8-triazaspiro[4.5]decan-3-yl]valeramide and 0.209 g of N-(benzyloxycarbonyl)glycine in 5 ml of dry dimethylformamide was stirred and cooled to ice temperature. The mixture was treated with 0.225 g of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and was then stirred at room temperature for 2 days. The solvent was evaporated and the residue partitioned between water and ethyl acetate. The ethyl acetate layer was washed successively with water, 5% aqueous sodium bicarbonate solution, saturated sodium chloride solution and dried over anhydrous magnesium sulphate. The solvent was evaporated and the residue triturated with ether and there was obtained 0.261 g of N-[8-{N-(benzyloxycarbonyl)aminoacetyl]-2(R)-[1(S)-(tert-butoxycarbonyl)-4-phenylbutyl]-4-methyl-N-[2,4-dioxo-1,3,8-triazaspiro[4.5]decan-3-yl]valeramide in the form of a white solid.

Provenance & Evidence