Hydrochloric Acid → HCID 15547268, compound

Participants

Reaction Steps

N-[N-[N-(4-(N-BOC-piperidin-4-yl)butanoyl)-N-ethylglycyl]aspartyl(b-benzyl ester)]-b-cyclohexylalanine, methyl ester (1.79 g) is dissolved in methanol (40 ml) and 10% palladium/carbon (0.25 g) is added. The mixture is shaken under hydrogen at 50 psi for about 18 hours. The mixture is filtered through a Celite pad and the filtrate evaporated in vacuo to give N-[N-[N-(4-(N-BOC-piperidin-4-yl)butanoyl)-N-ethylglycyl]aspartyl]-b-cyclohexylalanine, methyl ester. The ester is dissolved in methanol (20 ml) and 1N aqueous sodium hydroxide solution (10 ml) is added. The mixture is stirred at room temperature for about 4 hours, diluted with water (25 ml), and acidified to pH 2 with 1N HCl. The mixture is extracted with ethyl acetate (3×100 ml) and the ethyl acetate solution dried over magnesium sulfate, filtered and evaporated in vacuo to give N-[N-[N-(4-(N-BOC-piperidin-4-yl)butanoyl)-N-ethylglycyl]aspartyl]-b-cyclohexylalanine.

Provenance & Evidence