反应详情

Piperidine (1.8 ml, 18.2 mmol) was added to a solution of (R)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-(tert-butyldisulfanyl)propanoic acid (Compound 2c-B) (2.70 g, 6.06 mmol) in tetrahydrofuran (20 ml), and the mixture was stirred at room temperature for 30 minutes. The reaction mixture was then concentrated under reduced pressure, and the residue was purified by reverse-phase silica gel column chromatography (10 mM aqueous ammonium acetate solution/methanol=100/0→60/40) to afford (R)-3-(tert-butyldisulfanyl)-2-(methylamino)propanoic acid (Compound 2f-G) (610 mg, 45%).

1. concentrationThe reaction mixture was then concentrated under reduced pressure
2. customthe residue was purified by reverse-phase silica gel column chromatography (10 mM aqueous ammonium acetate solution/methanol=100/0→60/40)