反应详情

To a solution of the product of Example 13, Step B (0.11 g; 0.32 mmol) in anhydrous DMF (0.6 ml) 60% NaH in mineral oil (0.02 g; 0.5 mmol) was added and the mixture was stirred for 1 h at room temperature under N2. To it, a product of Step A (0.13 g; 0.383 mmol) was added and the resulting mixture was stirred for 3 days at ˜55° C. under N2, cooled to room temperature and diluted to 15 ml with Et2O, washed with H2O, brine, dried over anhydrous MgSO4 and filtered. The filtrate was evaporated to dryness under reduced pressure and the residue was purified by FCC (SiO2, CH2Cl2/EtOAc 8:2) to give the title compound (0.07 g; 37%) as a colourless solid. 1H-NMR (CDCl3) 1.23 (s, 9H); 1.46 (s, 3H); 1.53 (s, 3H); 3.71 (d, 2H, J=11.8 Hz); 3.84-3.94 (m, 15H); 4.12 (s, 1H); 4.76 (s, 2H); 6.96 (dd, 1H, J=2.2, 8.8 Hz); 7.06 (s, 2H); 7.16 (d, 1H, J=2.2 Hz); 7.44 (s, 1H); 8.24 (d, 1H, J=8.8 Hz).

1. stirringthe resulting mixture was stirred for 3 days at ˜55° C. under N2
2. temperaturecooled to room temperature
3. washwashed with H2O, brine
4. dry with materialdried over anhydrous MgSO4
5. filtrationfiltered
6. customThe filtrate was evaporated to dryness under reduced pressure
7. customthe residue was purified by FCC (SiO2, CH2Cl2/EtOAc 8:2)