Cesium carbonate → (4-Methoxy-3-nitro-phenyl)-methyl-(tetrahydro-pyran-4-yl)-amine

Participants

Reaction Steps

To a stirred solution of 7.50 g (32.0(mmol) 4-bromo-2-nitro-anisole in 200 ml dioxane were added 6.86 g (45.0 mmol) methyl-(tetrahydro-pyran-4-yl)-amine hydrochloride (1:1), 1.13 g (3.0 mmol) 2-(dicyclohexylphosphino)biphenyl, 14.75 g (45.0 mmol) cesium carbonate, and 360 mg (2.0 mmol) palladium (II) acetate. The mixture was heated at reflux for 72 h and then poured onto water and extracted three times with ethyl acetate. The combined organic phases were dried over sodium sulfate and concentrated in vacuo. Flash chromatography (1/2 hexane/ethyl acetate) afforded 1.59 g (18.5%) (4-methoxy-3-nitro-phenyl)-methyl-(tetrahydro-pyran-4-yl)-amine as a red solid. ES-MS m/e (%): 267 (M+H+, 100).

Provenance & Evidence