Pyridine, 2-(trimethylsilyl)- → Methyl 1-{[4-(pyridin-2-yl)phenyl]sulfonyl}piperidine-4-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a stirred suspension of methyl 1-[(4-iodophenyl)sulfonyl]piperidine-4-carboxylate (1.97 g, 4.81 mmol) and 2-(trimethylsilyl)pyridine (2.0 mL), 14.5 mmol) in anhydrous N,N-dimethyl formamide (50 mL) is added silver (I) oxide (1.12 g, 4.82 mmol), tetrakis(triphenylphosphine)palladium (0.28 g, 5 mol %) and tetrabutyl ammonium fluoride (1M in THF, 0.48 mL). The reaction is heated at 90° C. for 18 h. The reaction mixture is filtered and washed with EtOAc. The filtrate is concentrated under reduced pressure. Purification by column chromatography (silica, eluent: heptane, 5-75% EtOAc) gives 0.87 g (50%) of methyl 1-{[4-(pyridin-2-yl)phenyl]sulfonyl}piperidine-4-carboxylate. m/z=361 [M++H].

Provenance & Evidence