HCID 54051372, compound → HCID 53921737, compound

Participants

Reaction Steps

A solution of 278 mg (0.47 mmol) (R)-1-[[3-[2-[(R)-2-tert-butoxycarbonyl-pyrrolidin-1-yl]-2-oxo-ethyl]-1,3-dibutyl-ureido]-acetyl]-pyrrolidine-2-carboxylic acid tert-butyl ester in 2 ml trifluoroacetic acid was stirred for 4 h at room temperature. The solvent was removed in vacuo and the residue was dried to give 167 mg (74%) of the title compound as brown foam.

Provenance & Evidence