反应详情

Sodium borohydride (18.92 g, 0.5 mol) was added portionwise to a solution of 4-(allyloxy)-2-methoxy-1-(methylsulfanyl)benzene (26.0 g, 0.124 mol), and tetrakis(triphenylphosphine)palladium (0) (7.14 g, 6.18 mol) in THF (600 ml) at 5° C. The resultant solution was allowed to warm to RT and then heated to 45° C. for 14 h whilst protected under an atmosphere of nitrogen. After cooling in an ice-bath, the reaction mixture was acidified to pH5 with HCl (2M, 200 ml). Water (200 ml) and EtOAc (300 ml) were added, and the aqueous phase separated and extracted with EtOAc (2×200 ml). The combined organics were dried over MgSO4 and concentrated to a black solid (40 g) which was purified by flash column chromatography on silica gel eluting with EtOAc:pentane (1:9 to 3:7) to afford the title compound as a white solid (11.85 g, 0.07 mol).

1. temperatureheated to 45° C. for 14 h
2. temperatureAfter cooling in an ice-bath
3. customthe aqueous phase separated
4. extractionextracted with EtOAc (2×200 ml)
5. dry with materialThe combined organics were dried over MgSO4
6. concentrationconcentrated to a black solid (40 g) which
7. customwas purified by flash column chromatography on silica gel eluting with EtOAc:pentane (1:9 to 3:7)