Sodium hydride → HCID 57210728, compound

Participants

Reaction Steps

To 24.6 g (0.06 mole) of ethylmalonic acid-bis(2,2,6,6-tetramethyl-4-piperidinyl)ester in 80 ml of dimethylformamide there are added 2.5 g of NaH dispersion (55-60%) followed by 13.6 g (0.06 mole) of 2,6-di-methyl-4-tert. butyl-3-hydroxybenzyl chloride in 40 ml of DMF. The reaction mixture is stirred for 20 hours at 90°-100° C. and is then poured into ice-water; the aqueous solution is extracted with ether, the ethereal solution is dried over Na2SO4, and after removal of the solvent in vacuo there is obtained ethyl-(2,6-dimethyl-4-tert.butyl-3-hydroxybenzyl)malonic acid-bis (2,2,6,6-tetramethyl-4-piperidinyl)ester in the form of an oily yellowish residue (No. 43).

Provenance & Evidence