HCID 1222549, compound → HCID 54034265, compound

Participants

Reaction Steps

A mixture of 20.0 g (42 mmol) of di-(1-oxyl-2,2,6,6-tetramethyl-piperidin-4-yl) phthalate, 100 ml of acetic anhydride, and 500 mg of 5% Pd on C is hydrogenated in a Paar apparatus (50 psi, ambient temperature, 1 hour). Catalyst is filtered and solvent is evaporated. The residue is dissolved in 150 ml of ethyl acetate. The ethyl acetate solution is washed with 5% aqueous ammonia (2×100 ml), water (100 ml), and saturated sodium chloride (100 ml), then dried over magnesium sulfate and concentrated to obtain a crude solid. The crude product is recrystallized from methanol to obtain 14.9 g (64% yield) of a white crystalline solid, m.p. 172-175° C.

Provenance & Evidence