Methyl iodide → 1-Ethyl-1-methyl-4-oxopiperidin-1-ium iodide

Participants

Reaction Steps

To a solution of 1-ethyl-4-oxopiperidine (25 g, 0.197 mol) in acetone (250 ml) at RT in a water bath was added methyl iodide (15.5 ml, 0.25 mol) at such a rate to keep the temperature below 30° C. The mixture was filtered and the precipitate washed with acetone and dried to yield 1-ethyl-1-methyl-4-oxopiperidinium iodide (45 g) (LC/MS: Rt 0.38, [M+H]+ 143).

Provenance & Evidence