Sodium triacetoxyborohydride → 6-Methyl-8-{4-[2-(5-methoxy-1-benzofuran-3-yl)-1-methylethyl)piperazin-1-yl]quinoline

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Reaction Steps

6-methyl-8-{4-[2-(5-methoxy-1-benzofuran-3-yl)-1-methylethyl)piperazin-1-yl]quinoline was prepared by generally following the procedure outlined in example 38, step 2, starting from the 1-(5-methoxy-1-benzofuran-3-yl)acetone (204 mg, 1 mmol) and 6-methyl-8-piperazino quinoline (227.0 mg, 1 mmol) in 1,2-dichloroethane (100 ml) and acetic acid (1 ml), sodium triacetoxyborohydride (422 mg, 2 mmol). The product 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 yellow oil. Yield: 62 mg (14%); (M+H): 416; 1HNMR (400 MHz, CDCl3): δ□8.82˜8.81 (dd, J1=1.8 Hz, J2=1.8 Hz, 1H): 8.02˜8.00 (dd, J1=1.8 Hz, J2=1.8 Hz, 1H); 7.99˜6.58 (m, 7H); 3.87 (s, 3H); 3.46˜2.62(m, 11H); 2.5 (s, 3H); 1.15˜1.13 (d, J=6.0 Hz, 3H).

Provenance & Evidence