1-Chloro-4-(trifluoromethyl)benzene → 1-[4-(Trifluoromethyl)phenyl]piperidine

Participants

Reaction Steps

The general procedure from Example 1A was followed using 4-chloro-benzotrifluoride (650 mg, 3.6 mmol) and piperidine (258 mg, 3.0 mmol) with Pd2(dba)3 (55 mg, 0.081 mmol) and (Me3C)2PH(O) (21.0 mg, 0.126 mmol) and NaOtBu (432 mg, 4.5 mmol) in 6.0 mL of toluene. After 48 h, the reaction mixture was chromatographed with 5% ethyl acetate/hexane to give 161 mg (23% yield) of 4-piperidinobenzotrifluoride. It was >95% pure by 1H NMR and GC/MS. 1H NMR (500 MHz, CDCl3): δ7.36 (d, J=8.78 Hz, 2H), 6.82 (d, J=8.79 Hz, 2H), 3.18 (m, 4H), 1.60 (m, 4H), 1.54 (m, 2H) ppm. 13C NMR (125 MHz, CDCl3): d 153.7, 127.6, 126.3, 114.5, 49.2, 25.4, 24.2 ppm. MS: Calculated for C12H14F3N(M+): 229.1. Found: 230.2 (M++H).

Provenance & Evidence