反应详情

A mixture of the compound of Example 18(d) (0.1 g, 4.18 mmol), 4-fluorophenylboronic acid (0.118 g, 0.836 mmol), triethylamine (0.116 mL, 0.836 mmol), pyridine (0.068 mL, 0.836 mmol), copper (II) acetate (0.156 g, 0.836 mmol) and powdered 4 Å sieves in dichloromethane (10 mL) was stirred at RT for 7 h. Further quantities of fluorophenylboronic acid (0.06 g), copper (II) acetate (0.075 g) and powdered 4 Å sieves were added and stirring continued for 18 h. The mixture was retreated as above and stirred for a further 5 h then diluted with dichloromethane (20 mL) and filtered through a pad of celite. The filtrate was washed with saturated sodium carbonate and water, dried (Na2SO4) and evaporated in vacuo to give a brown solid. Flash chromatography (silica gel, 1:1 cyclohexane/ethyl acetate) afforded the title compound as a pale brown solid (0.106 g, 76%). MS(EI) m/e 334 [M+H]+. 1H NMR (400 MHz, CDCl3) δ 7.65 (d of d, J=10 and 5 Hz, 1H), 7.5-7.2 (m, 9H), 7.18 (d, J=8 Hz, 1H), 6.73 (d, J=10 Hz, 1H), 6.71 (d, J=10 Hz, 1H).

1. stirringstirring
2. waitcontinued for 18 h
3. stirringstirred for a further 5 h
4. filtrationfiltered through a pad of celite
5. washThe filtrate was washed with saturated sodium carbonate and water
6. dry with materialdried (Na2SO4)
7. customevaporated in vacuo
8. customto give a brown solid