Formaldehyde → HCID 20343477, compound

Participants

Reaction Steps

21.9 g (0.05 mole) of ethylmalonic acid-bis-(1,2,2,6,6-pentamethyl-4-piperidinyl)ester, 20.5 g (0.05 mole) of malonic acid-bis-(1,2,2,6,6-pentamethyl-4-piperidinyl)ester, 1.5 g (0.05 mole) of paraformaldehyde and 0.5 g of NaH are stirred in 120 ml of toluene for half an hour at room temperature and then for 7 hours at reflux temperature. After cooling, there is added 13.2 g (0.05 mole) of N-(3,5-di-tert.butyl-4-hydroxybenzyl)-dimethylamine, and the mixture is heated for 4 hours under reflux. Processing analogously to Example 1 yields 1-(3,5-di-tert.butyl-4-hydroxyphenyl)-2,2,4,4-tetra-(1,2,2,6,6-pentamethyl-4-piperidinyloxycarbonyl)-hexane as an oily residue.

Provenance & Evidence