4-Phenylcyclohexanone → Tert-butyl[3-(1-hydroxy-4-phenylcyclohexyl)pyridin-2-yl]carbamate

Participants

Reaction Steps

To a solution of tert-butyl(3-bromopyridin-2-yl)carbamate (4 g) in THF (dry) (20 mL) was added dropwise n-butyllithium (1.6 M in hexane) (20.1 mL) at −78° C. and the mixture was stirred at the same temperature under nitrogen for 1 hr to give a yellow suspension. A solution of 4-phenylcyclohexanone (3.06 g) in THF (dry) (30 mL) was added dropwise at −78° C. and the mixture was stirred at room temperature under nitrogen overnight. The mixture was quenched with water at 0° C. and extracted with EtOAc. The organic layer was separated, washed with brine and dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by column chromatography (silica gel, eluted with EtOAc in hexane) to give the title compound (560 mg) as a pale yellow solid.

Provenance & Evidence