Methyl p-toluenesulfonate → Pyridinium, 4-acetyl-1-methyl-, 4-methylbenzenesulfonate (1:1)

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Reaction Steps

4-Acetylpyridine (30.0 g, 0.25 mol) and p-toluene sulfonic acid methyl ester (55.8 g, 0.30 mol) in 500 ml ethanol were heated under reflux for 5 hours. The solvent was removed under vacuum in a rotary evaporator and the residue was taken up in ether. After separating off the ether phase, the product slowly crystallized out. The product was dried under vacuum.

Provenance & Evidence