Collect. Czech. Chem. Commun. 1995, 60, 1529-1535

Functional Derivatives of Sterically Hindered Amines. Polyalkylpiperidine Diesters

František Vašša and Jozef Lustoňb

a VASACHEM Co., 851 01 Bratislava, Slovak Republic
b Polymer Institute, Slovak Academy of Sciences, 842 36 Bratislava, Slovak Republic


Several diesters of dicarboxylic acids with pendant polyalkylpiperidine structural units were prepared from α-bromo and α,α'-dibromo substituted aliphatic dicarboxylic acid diesters by a nucleophilic replacement reaction with 2,2,6,6-tetramethyl-4-hydroxypiperidine, 1,2,2,6,6-pentamethyl-4-hydroxypiperidine, and 2,2,6,6-tetramethyl-4-aminopiperidine, by a nucleophilic addition of amino derivative to the α,β-unsaturated dicarboxylic acid diester and by an acid catalyzed condensation of 2,2,6,6-tetramethyl-4-oxopiperidine with diethyl bis(hydroxymethyl)malonate.