反应详情

A mixture of 3′ amino-2′-methyl-2-phenyl-2′H-spiro(chroman-4,5′-(1,2,4)oxadiazol)-6-ol (30 mg, 0.096 mmol), (bromomethyl)benzene (21.45 mg, 0.125 mmol) and K2CO3 (16 mg, 0.115 mmol) was dissolved in acetone, then the mixture was stirred at room temperature for 24 hours. The mixture was filtrated and concentrated. The residue was purified by preparative HPLC to give 6-(benzyloxy)-2′-methyl-2-phenyl-2′H-spiro[chroman-4,5′-[1,2,4]oxadiazol]3′-amine (140) (0.95 mg, 3%). 1H-NMR (MeOD): 7.32-7.56 (m, 10H), 6.91-7.23 (m, 3H), 5.12 (d, 2H), 5.23 (t, 2H), 3.31 (s, 3H) 2.73 (m, 1H), 2.32 (m, 1H);

1. filtrationThe mixture was filtrated
2. concentrationconcentrated
3. customThe residue was purified by preparative HPLC