反应详情

The product of Example 123, step 1 (1.59 mmol) in dry dichloromethane (10 ml) was treated with methylamine (5 ml, 10 mmol, 2M solution in THF) and stirred at room temperature for 18 hours. The mixture was reduced in vacuo and the resulting crude material was applied to a SCX ion exchange cartridge (Varian bond-elute, 10 g) and washed with methanol and then a mixture of 0.880 ammonia:methanol (1:9). The basic fractions were then reduced and the crude product purified by column chromatography eluting with a mixture of 0.880 ammonia:ethanol:dichloromethane (0.2:1.8:98 and then 0.4:3.6:96) to afford the title compound (E125). 1H NMR (CDCl3) δ 8.91 (1H, d, 1.3 Hz), 8.26 (1H, d, 1.3 Hz), 7.61 (1H, br quartet, 4.8 Hz), 7.15 (1H, m), 6.92 (2H, m), 3.03 (3H, d, 5.1 Hz), 2.93 (4H, m), 2.79 (1H, m), 2.47 (4H, m), 2.08 (2H, m), 1.91 (2H, m), 1.70-1.62 (2H, m).

1. washwashed with methanol
2. additiona mixture of 0.880 ammonia:methanol (1:9)
3. customthe crude product purified by column chromatography
4. washeluting with a mixture of 0.880 ammonia:ethanol:dichloromethane (0.2:1.8:98