Ammonium Chloride → tert-butyl (3S,4S)-4-(4-amino-2-chlorophenoxy)-3-fluoropiperidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of tert-butyl (3S,4S)-4-(2-chloro-4-nitrophenoxy)-3-fluoropiperidine-1-carboxylate (0.8 g, 1.0 eq, 2.2 mmol), Fe (0.6 g, 5.0 eq, 10.8 mmol) and NH4Cl (0.6 g, 5.0 eq, 10.8 mmol) in EtOH/H2O (1:1, 50 mL) was stirred at 90° C. for 1 hour. The mixture was cooled to room temperature and concentrated under reduced pressure to leave a crude solid. The crude mixture was dissolved in EtOAc (50 mL) and partitioned with H2O (50 mL). Organic layers were separated and the aqueous layer was washed with EtOAc (50 mL). The combined organic layers were dried over Na2SO4 and concentrated under vacuum to give the desired product in 45% yield. This product was taken to next step with out further purification.

Provenance & Evidence