Pentafluorophenol → HCID 59211996, compound

Participants

Reaction Steps

To a solution of [[2-((S)-3-tert-butoxycarbonylaminopyrrolidin-1-yl)-2-oxo-ethyl]-(3-phenoxyphenyl)amino]acetic acid 27 (4.36 g, 9.39 mmol) in DMF (30 mL) were added pentafluorophenol (1.88 g, 10.21 mmol) and 1-ethyl-3-(3′-dimethylaminopropyl)-carbodiimide (1.96 g, 10.22 mmol). The reaction mixture was stirred overnight at room temperature. It was then diluted with ethyl acetate, washed with 10% hydrochloric acid (×2), brine (×2), dried (Na2SO4) and concentrated in vacuo. The resultant solid was evaporated twice from diethyl ether to give the title compound as a colourless, glassy solid (3.4 g, 57%) which was used directly in the next step.

Provenance & Evidence