HCID 59875793, compound → HCID 57224616, compound

Participants

Reaction Steps

A mixture of tert-butyl (3R,5E)-6-[3-chloro-(4-phenyl)phenyl]-3-({[(1S)-2,2-dimethyl-1-({[(1R)-1-phenylethyl]amino}carbonyl)propyl]amino}carbonyl)hex-5-enoate (936 mg, 1.52 mmol) and p-toluenesulphonyl hydrazide (1.41 gm, 7.60 mmol) in toluene (15 mL) was stirred under nitrogen at reflux for 4 h. After being cooled, the mixture was diluted with ether (150 mL), and washed with water (50 mL), 0.5M hydrochloric acid (50 mL) and saturated aqueous sodium chloride (50 mL), dried (MgSO4), and concentrated under reduced pressure. The residue was purified by flash chromatography (gradient elution with hexane/ethyl acetate) to give tert-butyl (3R)-6-[3-chloro-(4-phenyl)phenyl]-3-({[(1S)-2,2-dimethyl-1-({[(1R)-1-phenylethyl]amino}carbonyl)propyl]amino)carbonyl)hexanoate (701 mg, 74%), as a colourless foam.

Provenance & Evidence