Trifluoroacetic acid → 4-[5-Fluoro-2-(3,3,5,5-tetramethylcyclohex-1-enyl)phenyl]piperidine

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Reaction Steps

To a solution of 4-[5-fluoro-2-(3,3,5,5-tetramethylcyclohex-1-enyl)phenyl]piperidine-1-carboxylic acid t-butyl ester (245 mg, 0.59 mmol) produced in Example (106f) in dichloromethane (3 mL) was added trifluoroacetic acid (3 mL), followed by stirring for 30 minutes at room temperature. The reaction mixture was concentrated under reduced pressure, and then saturated aqueous solution of sodium hydrogencarbonate was added to the obtained residue and extraction was performed with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate, and the filtrate was concentrated under reduced pressure to give 220 mg of a crude product of the title compound as a light yellow solid.

Provenance & Evidence