Diisopropylethylamine → N-[5-Chloro-4-(difluoromethyl)-2-nitrophenyl]-1-(tetrahydro-2H-pyran-4-yl)-4-piperidinamine

Participants

Reaction Conditions

Reaction Steps

A stirred solution of 1-chloro-2-(difluoromethyl)-5-fluoro-4-nitrobenzene (D96, 200 mg, 0.89 mmol) in dimethylformamide (4 ml) at room temperature under argon was treated with N,N-diisopropylethylamine (0.47 ml, 2.7 mmol), followed by 1-(tetrahydro-2H-pyran-4-yl)-4-piperidinamine dihydrochloride (D40, 240 mg, 0.94 mmol) and then heated at 70° C. for 1.5 hrs. The reaction mixture was concentrated under vacuum and the residue treated with 10% Na2CO3 solution and extracted with ethyl acetate. The extract was dried and concentrated under vacuum to leave an orange solid. This was purified by chromatography on silica gel eluting with 0-20% methanol/ethyl acetate to afford the title compound as a yellow solid (330 mg, 96%).

Provenance & Evidence