Lithium borohydride → tert-Butyl N-[(1R,2S)-rel-2-(4-hydroxyphenyl)cyclopropyl]carbamate

Participants

Reaction Steps

LiBH4 (0.34 g, 15.54 mmol) was added to a solution of Pd(PPh3)4 (0.15 g, 0.13 mmol) and tert-butyl(trans)-2-[4-(allyloxy)phenyl]cyclopropylcarbamate (Intermediate I, 0.75 g, 2.59 mmol) in dry THF (20 mL) and stirred at room temperature for 1 h. After removal of the solvent, the residue was dissolved in EtOAc (25 mL), acidified with HCl (10% aqueous solution, 2 mL), and washed with water (25 mL) and brine (25 mL). The organic layer was dried over anhydrous Na2SO4 and filtered. After removal of the solvent, the residue was purified by column chromatography on silica gel (10%-20% EtOAc/Hexanes), affording 0.58 g of tert-butyl(trans)-2-(4-hydroxyphenyl)cyclopropylcarbamate [Rf=0.3 (30% EtOAc/Hexanes), pale yellow foam, 90% yield].

Provenance & Evidence