Acetic Anhydride → HCID 23338188, compound

Participants

Reaction Steps

A solution of 2,2,6,6-tetramethyl-4-piperidinyl 2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)-acetoacetate (Example 1, 10.0 g; 0.015 mol) in 100 ml of acetic anhydride is stirred for 20 hours at 100°. The mixture is concentrated in vacuo. After recrystallisation from hexane/toluene, the product is filtered off and 8.41 g of 1-acetyl-2,2,6,6-tetramethyl-4-piperidinyl 2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)-acetoacetate, melting point 165°-166° C. (compound 22), are obtained.

Provenance & Evidence