反应详情

8-Amino-2-naphthalenesulfonic acid (Aldrich, 1.00 g, 4.48 mmol) and 3,4-dichlorobenzoyl chloride (938 mg, 4.48 mmol) were dissolved in pyridine (10.0 mL), and the resulting reaction mixture was stirred at room temperature for 12 h. The reaction mixture was then concentrated in vacuo, and the residue was dissolved in 1N HCl. The solution was extracted with EtOAc (5×), and the combined organic extracts were dried over Na2SO4, filtered and concentrated in vacuo to afford the title compound (1.70 g, 91%). 1H NMR (DMSO-d6) δ 11.30 (s, 1H), 8.93 (d, J=2.0 Hz, 1H), 8.83 (s, 1H), 8.65 (dd, J=8.0, 1.9 Hz, 1H), 8.58-8.50 (m, 1H), 8.50-8.43 (m, 2H), 8.34 (dd, J=8.6, 1.5 Hz, 1H), 8.19-8.14 (m, 2H), 6.14 (br s, 1H); MS(ESI−) m/z 394.2 (M−H)−.

1. customthe resulting reaction mixture
2. concentrationThe reaction mixture was then concentrated in vacuo
3. dissolutionthe residue was dissolved in 1N HCl
4. extractionThe solution was extracted with EtOAc (5×)
5. dry with materialthe combined organic extracts were dried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo