Deng Yi
2008
Citations
0
Influential Citations
0
Citations
Journal
Journal of Molecular Catalysis
Abstract
The synthetic technology of dodecyl 3-(2,2,6,6-tetramethylpiperidin-4-yl-amino) propanoate,a po-lymeric hindered amines light stabilizer,was established in this thesis.Dodecyl 3-(2,2,6,6-tetramethylpiperidin-4-yl-amino) propanoate was prepared from 3-(2,2,6,6-tetramethyl-piperidin-4-yl)-amine and methyl acrylate through Michael addition,then the product of Michael addition and dodecyl alcohol through transesterication.Technology parameters involved in transesterication were optimized.Catalytic activity of tetraisopropyl orthotitanate was the best.Under optimal reaction conditions: n(methyl 3-(2,2,6,6-tetramethylpiperidin-4-yl-amino) propane-ate)∶n(dodecyl alcohol) 1∶1.10,mass fraction of tetraisopropyl orthotitanate to total reactants 0.30%,reaction temperature 180 ℃ and reaction time 8 h,the yield was 90.6%.The total yield was 86.3%.Structures of the title compound and intermediate were confirmed by MS.