Ethanol → HCID 20449614, compound

Participants

Reaction Steps

8.5 g (0.02 mol) of ethyl 4,4-bis-(3-tert.-butyl-4-hydroxyphenyl)-valerate and 3.1 g (0.02 mol) of 4-hydroxy-2,2,6,6-tetramethylpiperidine are dissolved in 200 ml of xylene. 0.1 g of dibutyltin oxide is added, and the mixture is heated at the boil under nitrogen for about 6 hours, during which the resulting ethanol is distilled off continuously. When no more ethanol distils off, the reaction solution is cooled down to room temperature, is admixed with 200 ml of water and is efficiently mixed. The organic phase is separated off, is dried over magnesium sulfate and is evaporated. The resulting oil is purified by column chromatography to give 2,2,6,6-tetramethylpiperidin-4-yl 4,4-bis-(3-tert.-butyl-4-hydroxyphenyl)-valerate in the form of a colourless solid having a melting point of 100°.

Provenance & Evidence