反应详情

1.20 g (6.62 mmol) 2-methoxy-4-propoxyaniline (Example XXXI) in 8.5 mL EtOH and 1.8 mL water are stirred under reflux. During 30 min 2.19 g (6.62 mmol) N-methyl-N-benzyl-4-oxopiperidinium iodide (Org. Lett. 1999, 1, 1261-1262) are added by several portions. Stirring under reflux is continued for 1 h. Then the reaction mixture is cooled down to rt before water and DCM are added. The layers are separated and the org. layer is dried with MgSO4, filtered and the solvent is removed in vacuo. The resulting residue is purified by column chromatography (silica gel, PE/EtOAc 8/2).

1. temperatureunder reflux
2. temperatureunder reflux
3. additionare added
4. customThe layers are separated
5. dry with materiallayer is dried with MgSO4
6. filtrationfiltered
7. customthe solvent is removed in vacuo
8. customThe resulting residue is purified by column chromatography (silica gel, PE/EtOAc 8/2)