反应详情

A mixture of chloride 6 (5.23 g, 21.3 mmol), 10% Pd/C (2.7 g), Et3N (3.6 mL, 25.8 mmol) in THF:MeOH=5:1 (180 mL) was stirred under H2 overnight. More 10% Pd/C (1.3 g) was added and stirring was continued for 3 h. Catalyst was removed by filtration and the solution was concentrated to dryness in vacuum. The residue was purified by SGC with CH2Cl2:AcOEt as eluent in gradient (up to 20% AcOEt) to afford 7 (5.23 g, 88%), greenish powder. 1H NMR (400 MHz, CDCl3) δ 6.59 (dd, J=3.5, 2.0 Hz, 1H), 7.04-7.10 (m, 1H), 7.33-7.37 (m, 1H), 7.40-7.48 (m, 3H), 8.14 (d, J=2.1 Hz, 1H), 8.57 (d, J=2.1 Hz, 1H), 9.91 (bs, 1H).

1. customCatalyst was removed by filtration
2. concentrationthe solution was concentrated to dryness in vacuum
3. customThe residue was purified by SGC with CH2Cl2