Diisopropylethylamine → HCID 53924705, compound

Participants

Reaction Conditions

Reaction Steps

(S)-2-[(Azepane-1-carbonyl)-amino]-3-methyl-pentanoic acid (0.300 g, 1.24 mmol) was dissolved in dry DMF (4 mL) under nitrogen atmosphere and cooled to 0° C. in an ice-water bath. To this solution were added, in succession, N,N-diisopropylethylamine (0.647 mL, 3.71 mmol) and solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (0.470 g, 1.24 mmol). The resulting reaction mixture was stirred at that temperature for 30 minutes; solid 4,4-bis-(4-fluoro-phenyl)-butylamine monohydrochloride (0.369 g, 1.24 mmol) was then added. After stirring for, sequentially, 15 minutes at 0° C. and 25 minutes at ambient temperature, reaction mixture was mixed with 60 mL of diethyl ether; the resulting mixture was successively washed with saturated aqueous NaHCO3 solution (2×60 mL), brine (2×60 mL), and was dried over Na2SO4. The solution was concentrated in vacuo affording a viscous oil. The crude product was further purified by flash chromatography (60% EtOAc in hexane) to provide 0.50 g (81%) of the pure titled compound as a white foam; mp 50-60° C. APCI-MS m/z 500.3 (MH+).

Provenance & Evidence