Hydrochloric Acid → [1-(4-Fluoro-phenyl)-4-hydroxy-cyclohexyl]-carbamic acid benzyl ester

Participants

Reaction Steps

1.5 g of [1-(4-Fluoro-phenyl)-4-oxo-cyclohexyl]-carbamic acid benzyl ester (77) were dissolved in 30 mL of dry THF and 182 mg of sodium borohydride were added. When conversion was complete, the mixture was poured into 15 mL of water. pH was adjusted to 2 by addition of 2N HCl and the aqueous layer was extracted with ethyl acetate. The combined organic layer was extracted with brine, dried over magnesium sulfate and evaporated to dryness to give 1.38 g of the desired product as a mixture of cis and trans isomers, the cis isomer (referring to the position of alcohol and Z-amine) being the major one. Rt=2.20 min (Method E). Detected mass: 344.2 (M+H+).

Provenance & Evidence