反应详情

To a flask containing boronic acid (0.175 g, 0.76 mmol), amine (6q) (0.22 g, 0.915 mmol), Cu(OAc)2 (0.135 g, 0.76 mmol) and 4 Å sieves (0.2 g) in DCM, Et3N (0.52 mL, 3.7 mmol) was slowly added. The mixture was stirred at room temperature for 3 days. DCM was added to the reaction mixture and filtered. The filtrate was washed with H2O (2×), brine and dried over Na2SO4. After concentration, the residue was purified by chromatography (Sep-Pak; 10 g) with hexane/Et2O (3:1). The fractions containing the product were combined to afford (7q-2) (0.12 g, 37% yield). 1HNMR (400 MHz, CDCl3) δ 7.82 (s, 1H), 7.34 (d, J=8.6 Hz, 1H), 7.24 (br s, 1H), 7.13 (d, J=8.6 Hz, 1H), 6.94-6.84 (m, 3H), 5.02 (br s, NH), 4.35 (d, J=7.8 Hz, 2H), 4.29 (d, J=6.2 Hz, 2H), 2.98-2.85 (m, 1H), 2.10-1.98 (m, 2H), 1.95-1.79 (m, 4H), 1.44 (s, 9H); MS (APCI+) m/z 425 (M+H) was detected.

1. filtrationfiltered
2. washThe filtrate was washed with H2O (2×), brine
3. dry with materialdried over Na2SO4
4. concentrationAfter concentration
5. customthe residue was purified by chromatography (Sep-Pak; 10 g) with hexane/Et2O (3:1)
6. additionThe fractions containing the product