Lithium borohydride → Tert-butyl 4-[3-(hydroxymethyl)phenyl]piperazine-1-carboxylate

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Reaction Steps

tert-Butyl-4-(3-(ethoxycarbonyl)phenyl)piperazine-1-carboxylate (0.20 g, 0.60 mmol) was dissolved in THF (1 mL) and lithium borohydride (0.10 g, 7.5 eq) was added in three portions. The reaction mixture stirred at rt for 48 h then quenched with saturated ammonium chloride under ice-cooling. The aqueous phase was extracted with DCM and the combined organic phases dried over sodium sulfate and evaporated to afford tert-butyl 4-(3-(hydroxymethyl)phenyl)piperazine-1-carboxylate (0.16 mg, 0.54 mmol, 90%).

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