反应详情

To a suspension of magnesium turnings (0.48 g) in tetrahydrofuran (10 ml) was added dropwise a solution of 4-hexyloxybromobenzene (5 g) in tetrahydrofuran (70 ml) and stirred for 1 hour at ambient temperature. Then to the reaction mixture was added 1-benzyloxycarbonyl-4-piperidone (4.12 g) and stirred for 2 hours under ice-cooling. The reaction was quenched with saturated NH4Cl aq. and extracted with ethyl acetate. The organic layer was taken and dried over magnesium sulfate. The magnesium sulfate was filtered off, and filtrate was evaporated under reduced pressure. The residue was subjected to column chromatography on silica gel and eluted with (hexane/ethyl acetate)=(3/1). The fractions containing the object compound were collected and evaporated under reduced pressure to give 1-benzyloxycarbonyl-4-(4-hexyloxyphenyl)-4-hydroxypiperidine (3.44 g).

1. stirringstirred for 2 hours under ice-
2. temperaturecooling
3. customThe reaction was quenched with saturated NH4Cl aq.
4. extractionextracted with ethyl acetate
5. dry with materialdried over magnesium sulfate
6. filtrationThe magnesium sulfate was filtered off
7. customfiltrate was evaporated under reduced pressure
8. washeluted with (hexane/ethyl acetate)=(3/1)
9. additionThe fractions containing the object compound
10. customwere collected
11. customevaporated under reduced pressure