反应详情

To a solution of the Product of Example 1K (0.092 g, 0.11 mmol) in tetrahydrofuran (1 mL) was added 4 M HCl in dioxane (1 mL, 4.2 mol) at ambient temperature. After stirred for four hours, the solid HCl salt of the product was filtered off and taken up in a small amount of methanol and added to a NaHCO3 solution. The free amine was extracted into ethyl acetate, concentrated and purified by combi-flash 12 g column, eluting with 0-10% Methanol in dichloromethane to give a yellow solid (0.035 g, 43%). 1H NMR (400 MHz, Solvent) d ppm 1.36 (d, J=7.02 Hz, 6H) 1.89-2.36 (m, 4H) 3.24 (dd, J=13.89, 6.87 Hz, 1H) 3.50-3.81 (m, 4H) 5.09-5.20 (m, 1H) 6.66 (d, J=8.54 Hz, 2H) 6.98-7.10 (m, 2H) 7.12-7.35 (m, 7H) 7.55 (d, J=8.54 Hz, 1H) 7.66-7.79 (m, 5H) 7.96 (s, 1H) 8.49 (s, 1H) 8.76 (d, J=8.24 Hz, 1H)

1. filtrationthe solid HCl salt of the product was filtered off
2. additionadded to a NaHCO3 solution
3. extractionThe free amine was extracted into ethyl acetate
4. concentrationconcentrated
5. custompurified by combi-flash 12 g column
6. washeluting with 0-10% Methanol in dichloromethane