Water → (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-[(1R)-1-(N-methyl-N-{(1R)-1-[N-methyl-N-(2-(2-pyridinyl)ethyl)carbamoyl]-2-phenylethyl}carbamoyl)-2-(2-naphthyl)ethyl]amide

Participants

Reaction Conditions

Reaction Steps

((3E)-1,1-Dimethyl-4-{N-methyl-N-[(1R)1-(N-methyl-N-{(1R)-1-[N-methyl-N-(2-(pyridin-2-yl)ethyl)carbamoyl]-2-phenylethyl}carbamoyl)-2-(2-naphthyl)ethyl]carbamoyl}but-3-enyl)carbamic acid tert-butyl ester (5.28 g, 7.2 mmol) was dissolved in dichloromethane (50 mL). The solution was cooled to −10° C. Trifluoroacetic acid (50 mL) was added to the stirred solution. The reaction mixture was stirred for 45 min at −10° C. The reaction mixture was added to a solution of ice, sodium hydrogen carbonate and water. The reaction mixture was neutralised with sodium hydrogen carbonate. Dichloromethane (400 mL) was added. The aqueous phase was extracted with dichloromethane (300 mL). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (40 g), using 15% of a solution, 7% ammonium in ethanole, in dichloromethane as eluent, to give 3.2 g of the title compound.

Provenance & Evidence