2,3,4-Trimethylpyridine → 2,3,4-Trimethyl-1-oxidopyridin-1-ium
Reaction equation
[CH3:1][C:2]1[C:7]([CH3:8])=[C:6]([CH3:9])[CH:5]=[CH:4][N:3]=1.ClC1C=CC=C(C(OO)=[O:18])C=1>C(Cl)Cl>[CH3:1][C:2]1[C:7]([CH3:8])=[C:6]([CH3:9])[CH:5]=[CH:4][N+:3]=1[O-:18]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
A solution of 14 g of 2,3,4-trimethylpyridine in 140 ml of methylene chloride is treated cautiously while cooling with ice with 21 g of m-chloroperbenzoic acid. The reaction mixture is boiled at reflux for 1 hour, then made basic with a saturated soda solution and subsequently extracted. The organic phase is dried and concentrated. The residue is purified on a silica gel column, the medium pressure flash chromatography method (solvent: methylene chloride/methanol [5:1 ) being used and the pressure being produced with nitrogen gas. The 2,3,4-trimethylpyridine N-oxide obtained is processed directly.