2,2-Bis{4-[2-hydroxy-3-(7,7,8,9,9-pentamethyl-2,4-dioxo-1,3,8-triazaspiro[4.5]dec-3-yl)propoxy]phenyl}propane → 2,2-Bis{4-[2-acetoxy-3-(7,7,8,9,9-pentamethyl-2,4-dioxo-1,3,8-triazaspiro[4.5]dec-3-yl)propoxy]phenyl}propane

Participants

Reaction Steps

A mixture of 4.0 g of 2,2-bis{4-[2-hydroxy-3-(7,7,8,9,9-pentamethyl-2,4-dioxo-1,3,8-triazaspiro[4.5]dec-3-yl)propoxy]phenyl}propane, obtained as described in Example 1, and 100 ml of acetic anhydride was heated at 120°-130° C. for 6 hours. The reaction mixture was then treated substantially as described in Example 13, to give the desired Compound No. 35 in the form of white crystals melting at 229°-237° C.

Provenance & Evidence