Triethylamine → HCID 69246465, compound

Participants

Reaction Steps

To a solution of N-methyl piperazine (80 g, 0.91 mol) and triethylamine (232 g, 2.29 mol) in absolute alcohol (1750 ml) was added dropwise at 0° C. a solution of 4-methoxycarbonyl-benzyl bromide (252 g, 1.1034 mol) in absolute alcohol (250 ml). The mixture was stirred overnight at RT. Then the mixture was concentrated and the residue obtained was taken up in 1.5N HCl (3 L) then washed with diethyl ether (3 times) and ethyl acetate. The solution was neutralized with a 10% aqueous NaOH solution and basified up to pH=8 with a 10% aqueous NaHCO3 solution. The product was extracted with CHCl3, washed with water and brine then dried over Na2SO4. The solvent was removed and the crude was purified by column chromatography CHCl3/MeOH to give N-methyl(4-methoxy carbonyl benzyl)piperazine (150 g, 70%) as a brown liquid.

Provenance & Evidence