反应详情

A mixture of 4-{2-[({[(4-methylphenyl)sulfonyl]amino}carbonyl)oxy]ethyl}phenylboronic acid (200 mg, 0.55 mmol), 3-methyl-4-phenylpyrazole (87 mg, 0.55 mmol), Copper(II) acetate (120 mg, 0.66 mmol), triethylamine (0.23 mL, 1.65 mmol), molecular sieves 4A (200 mg), and dichloromethane (8 mL) was stirred at room temperature for 3 days. After filtration through a bed of celite, the filtrate was diluted with dichloromethane, and washed with water. The organic fraction was dried over MgSO4. After concentration under reduced pressure, the residue was purified by TLC with dichloromethane/ethylacetate (10:1) to afford 56 mg (21%) of the title compound as white solids: MS (ESI) m/z 476 [M+H]+, 474 [M−H]−, 1H-NMR (CDCl3) δ 7.88 (2H, d, J=8.5 Hz), 7.61-7.19 (11H, m), 4.31 (2H, t, J=6.6 Hz), 2.92 (2H, t, J=6.6 Hz), 2.49 (3H, s), 2.42 (3H, s).

1. filtrationAfter filtration through a bed of celite
2. additionthe filtrate was diluted with dichloromethane
3. washwashed with water
4. dry with materialThe organic fraction was dried over MgSO4
5. concentrationAfter concentration under reduced pressure
6. customthe residue was purified by TLC with dichloromethane/ethylacetate (10:1)