反应详情

To a stirred mixture of 1-(5-methoxy-1-benzofuran-3-yl)acetone (204 mg, 1 mmol) and 8-piperazino quinoline (213.0 mg, 1 mmol) in 1,2-dichloroethane (100 ml) and acetic acid (1 ml), sodium triacetoxyborohydride (422 mg, 2 mmol) was added at room temperature. Reaction mixture was stirred at room temperature for 72 hrs. At the end, reaction mixture was neutralized with 10% NaHCO3 and extracted with chloroform. The organic layer was dried over anhydrous MgSO4, filtered and concentrated. The product obtained was purified by silica-gel column chromatography by eluting it initially with 80% ethyl acetate:hexane and then with 5% methanol:ethyl acetate, yielding a brown semi-solid. Yield: 60 mg (14%); (M+H): 402; 1HNMR (400 MHz, CDCl3): δ 8.90˜8.88 (dd, J1=1.8 Hz, J2=1.8 Hz, 1H); 8.13˜8.10 (dd, J1=1.8 Hz, J2=1.8 Hz, 1H); 7.60˜6.70 (m, 8H); 3.87 (s, 3H); 3.50˜2.50 (m, 11H); 1.15˜1.13 (d, J=6.0 Hz, 3H).

1. additionwas added at room temperature
2. customReaction mixture
3. customAt the end, reaction mixture
4. extractionextracted with chloroform
5. dry with materialThe organic layer was dried over anhydrous MgSO4
6. filtrationfiltered
7. concentrationconcentrated
8. customThe product obtained
9. customwas purified by silica-gel column chromatography
10. washby eluting it initially with 80% ethyl acetate
11. customhexane and then with 5% methanol:ethyl acetate, yielding a brown semi-solid