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0 °C

To a solution of methyl 3-cyano-4-cyclohexylbenzoate (299.0 mg, 1.229 mmol) in 1,4-dioxane (30 mL) was added 2 M lithium borohydride solution in tetrahydrofuran (1.23 mL, 2.46 mmol). The mixture was heated under reflux for 2.5 h. The mixture was cooled to 0° C. and quenched with 1 N aqueous HCl solution slowly to pH 5. After the addition of brine solution, the mixture was extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, concentrated under reduced pressure and purified by silica gel column chromatography to provide the title compound as a white solid (190.5 mg). LCMS m/z=216.5 [M+H]+; NMR (400 MHz, CDCl3) δ ppm 1.23-1.33 (m, 1H), 1.41-1.52 (m, 4H), 1.76-1.83 (m, 1H), 1.84-1.92 (m, 4H), 2.90-3.05 (m, 1H), 4.70 (d, J=5.81 Hz, 2H), 7.36 (d, J=8.21 Hz, 1H), 7.53 (dd, J=8.27, 1.71 Hz, 1H), 7.61 (d, J=1.39 Hz, 1H).

1. temperatureThe mixture was heated
2. temperatureunder reflux for 2.5 h
3. customquenched with 1 N aqueous HCl solution slowly to pH 5
4. additionAfter the addition of brine solution
5. extractionthe mixture was extracted with ethyl acetate
6. dry with materialThe organic layer was dried over anhydrous sodium sulfate
7. concentrationconcentrated under reduced pressure
8. custompurified by silica gel column chromatography