反应详情

To a solution of Ethyl 3-(2,6-dimethylbenzyloxy)-2-methylbenzoate (Step B, 5.94 g, 19.93 mmol) in dry THF (35 ml) was added drop wise LiAlH4 (1M in THF, 0.832 g, 21.92 mmol) at 0° C. under argon. The reaction mixture was stirred for 4 hours or until all the starting material is consumed, then quenched slowly with 0.1N HCl at 0° C., and EtOAc (20 ml) was added to the reaction mixture. The reaction mixture was filtered and precipitate was washed with EtOAc (25 ml×2). The combined organic layer was washed with 0.1N HCl, brine, dried over Na2SO4, filtered, concentrated, and purified by flash chromatography on a silica gel column (hex: ethyl acetate 2:1) to give the title compound.

1. customis consumed
2. customquenched slowly with 0.1N HCl at 0° C.
3. additionEtOAc (20 ml) was added to the reaction mixture
4. filtrationThe reaction mixture was filtered
5. washprecipitate was washed with EtOAc (25 ml×2)
6. washThe combined organic layer was washed with 0.1N HCl, brine
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated
10. custompurified by flash chromatography on a silica gel column (hex: ethyl acetate 2:1)