Methyl iodide → HCID 22479032, compound

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Reaction Steps

A mixture of 4-methylphenylacetone (3.01 g), paraformaldehyde (0.489 g) and dimethylamine hydrochloride (1.49 g) in MeOH (2 ml) is stirred under reflux for 3 h. The reaction mixture is diluted with 20 ml of water and the product is extracted with two portions of ether. After addition of 1 M aqueous NaOH solution, the aqueous layer is extracted with two more portions of ether. The combined organic layers are dried (Na2SO4) and the solvent is evaporated to obtain 4-dimethylamino-3-p-tolyl-butan-2-one (compound of formula VI) as a yellowish liquid, MS (ISP) 206.2 (M+H)+. 4-Dimethylamino-3-p-tolyl-butan-2-one is dissolved in AcOEt (17 ml) and iodomethane (1.46) is added. After 1 h the formed solid is collected by filtration, washed with AcOEt and dried on the vacuum. 2.61 g of trimethyl-(3-oxo-2-p-tolyl-butyl)-ammonium iodide are obtained as an off-white solid, MS (ISP) 220.3 M+.

Provenance & Evidence