反应详情

Piperidine (0.40 mL) was added to a solution of (S)-1-(9H-fluoren-9-yl)-14,14-dimethyl-10-((1-methyl-1H-imidazol-2-yl)methyl)-3,12-dioxo-2,13-dioxa-4,10-diazapentadecane-5-carboxylic acid (190 mg, 0.33 mmol) in DMF (2.0 mL). The mixture was stirred at room temperature for 2 hrs. The solvent was evaporated under reduce pressure to afford a residue, which was purified by Amberchrom to afford (S)-2-amino-6-((2-tert-butoxy-2-oxoethyl)((1-methyl-1H-imidazol-2-yl)methyl)amino)hexanoic acid (115 mg, 100%). 1H NMR (400 MHz, DMSO) 7.27 (brs, 1H), 7.04 (s, 1H), 6.72 (s, 1H), 3.73 (s, 2H), 3.64 (s, 3H), 3.15 (s, 2H), 3.04 (dd, J=6.8, 5.2 Hz, 1H), 2.47 (t, J=7.2 Hz, 2H), 1.65-1.46 (m, 2H), 1.39 (s, 9H), 1.30-1.21 (m, 4H); MS (ESI), 355 (M+H)+.

1. customThe solvent was evaporated
2. customto afford a residue, which
3. customwas purified by Amberchrom