Benzene, 1-bromo-4-(trifluoromethyl)- → Tert-butyl 1-[4-(trifluoromethyl)phenyl]piperidin-4-ylcarbamate

Participants

Reaction Conditions

Reaction Steps

A 100 mL round bottom flask was mixed with 4-triflouromethylbromobenzene (3.2 g, 15.0 mmol), triisopropylphosphine (10.0 mg, 0.062 mmol), Pd(OAc)2 (3.0 mg, 0.013 mmol) and xylenes (50 mL). The reaction mixture was allowed to heat at 110° C. for a period of 30 min at which it was mixed with tert-butyl piperidin-4-ylcarbamate (1.0 g 5.0 mmol). The reaction mixture stirred at 120° C. for 4.0 hours and then cooled to RT. The reaction mixture was partitioned between EtOAc and saturated NaHCO3. The organics were dried over MgSO4 and concentrated to a crude oil. The oil was purified using silica gel chromatography (90% hexanes/10% EtOAc) to yield a total of 472 mg of mostly pure solid.

Provenance & Evidence