Acetic Acid → Butyl-(3,5-di-tert.butyl-4-hydroxybenzyl)malonic acid-bis(2,3,6-trimethyl-2,6-diethyl-4-piperidinyl) ester

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Reaction Steps

26.2 g (0.05 mole) of butylmalonic acid-bis(2,3,6-trimethyl-2,6-diethyl-4-piperidinyl)ester and 13.2 g (0.05 mole) of N-(3,5-di-tert.butyl-4-hydroxybenzyl) dimethylamine are dissolved in 200 ml of toluene. After the addition of 0.25 g of lithium amide, the mixture is refluxed for 4 hours. After cooling, the mixture is neutralised with 1.5 ml of 1% acetic acid, and the organic phase is repeatedly washed with water. After drying over Na2SO4, the solution is concentrated in vacuo. As residue there is obtained butyl-(3,5-di-tert.butyl-4-hydroxybenzyl)malonic acid-bis(2,3,6-trimethyl-2,6-diethyl-4-piperidinyl) ester in the form of viscous oil (Compound No. 32).

Provenance & Evidence