HCID 18653543, compound → HCID 18653540, compound

Participants

Reaction Steps

200 mg of 4-(1,3-dihydro-1,3-dioxo-2H-benz[f]isoindol-2-yl)-2-(R)-[[3-methyl-1-(S)-[[(3-nitrobenzyl)amino]carbonyl]butyl]amino]-butanoic acid-1,1-dimethylethyl ester, prepared as in Example 30 where the protecting group Rp, 1,1-dimethylethyl was not removed following the condensation reaction seen in Scheme 1, was added to ethanol:H2O (20:1). 10 mL of ethyl acetate was added and the mixture was stirred with heating until the solid dissolved. The mixture was cooled to RT and 20 mg of 10% palladium over activated carbon was added. The mixture was purged with nitrogen. The mixture was purged with hydrogen, and stirred under hydrogen for 3 h. The mixture was filtered and washed with ethyl acetate. The solvents were removed by evaporation and the residue was purified by reverse phase H.P.L.C. to give a white solid; 83 mg

Provenance & Evidence