Diisopropylethylamine → (S)-benzyl 5-((2-(benzyloxy)-2-oxoethyl)amino)-2-((tert-butoxycarbonyl)amino)-5-oxopentanoate

Participants

Reaction Conditions

Reaction Steps

A solution of benzyl 2-aminoacetate hydrochloride (15.8 mg, 0.0784 mmol) and DIPEA (0.0136 ml, 0.0784 mmol) in DMF (0.0784 ml) was added to a solution of (S)-benzyl 2-((tert-butoxycarbonyl)amino)-5-((4-trifluorophenyl)thio)-5-oxopentanoate (Compound 5f-2) (30.0 mg, 0.0603 mmol) in DMF (0.541 ml) and water (0.200 ml), and the mixture was stirred at 50° C. for 45 minutes. The reaction mixture was then purified by reverse-phase silica gel column chromatography (10 mM aqueous ammonium acetate solution/methanol=70/30→20/80) to afford (S)-benzyl 5-((2-(benzyloxy)-2-oxoethyl)amino)-2-((tert-butoxycarbonyl)amino)-5-oxopentanoate (Compound 5d-2) (26.4 mg, 90%).

Provenance & Evidence