4-{2-[2-(tert-Butoxycarbonyl-methyl-amino)-propionylamino]-2-cyclohexyl-acetyl}-3-phenylcarbamoyl-hexahydro-pyrrolo[3,2-b]pyrrole-1-carboxylic acid benzyl ester → {1-[1-Cyclohexyl-2-oxo-2-(6-phenylcarbamoyl-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl)-ethylcarbamoyl]-ethyl}-methyl-carbamic acid tert-butyl ester

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Reaction Steps

A mixture of 41 (440 mg, 0.64 mmol) and 10% palladium-on-carbon (88 mg) in MeOH (15 mL) was shaken at 48 psi under a H2 atmosphere. After 2 h, the mixture was filtered through a 0.45 μM filtering disc, washed with MeOH and concentrated to afford 42 (352 mg) as a white foam that was used without further purification. Mass spectrum, m/z [556.6] (M+H)+.

Provenance & Evidence