反应详情

A solution of N-Boc-4-cyanophenylalanine (1.92 g, 6.6 mmol) and pentafluorophenol (2.43 g, 13.2 mmol) in CH2Cl2 (30 ml) at 0° C. was treated with 4-methylmorpholine (0.74 g, 7.3 mmol). After stirring the reaction mixture for 3 hours, 8M methylamine in ethanol (15 ml, 19.8 mmol) was added and the reaction mixture left to stir at room temperature for 16 hours. The solvent was removed under pressure, the residue dissolved in CH2Cl2 (50 ml) and washed with saturated sodium bicarbonate (2×50 ml), 1M citric acid (2×50 ml) and brine (50 ml). The CH2Cl2 layer was dried over MgSO4 and the solvent removed under pressure to yield the title compound as a white solid (1.84 g, 92%).

1. waitthe reaction mixture left
2. stirringto stir at room temperature for 16 hours
3. customThe solvent was removed under pressure
4. dissolutionthe residue dissolved in CH2Cl2 (50 ml)
5. washwashed with saturated sodium bicarbonate (2×50 ml), 1M citric acid (2×50 ml) and brine (50 ml)
6. dry with materialThe CH2Cl2 layer was dried over MgSO4
7. customthe solvent removed under pressure