O-Xylene → Tris-(1-benzyl-2,2,6,6-tetramethyl-4-piperidinyl)hexane-1,2,2-tricarboxylate

Beteiligte Stoffe

Reaktionsschritte

30.2 g (0.1 mol) of triethyl hexane-1,2,2-tricarboxylate, 74.2 g (0.3 mol) of 1-benzyl-2,2,6,6-tetramethyl-4-hydroxypiperidine and 50 ml of xylene are warmed to 130° and mixed with 0.8 g of LiNH2. The ethanol formed is distilled off continuously. The solution is kept at the above temperature for 3 hours, so that it can then be kept at 150° for a further 2 hours. After cooling, the residue is taken up in toluene, a little glacial acetic acid is added to the solution and the latter is washed with H2O. After drying over Na2SO4, the solvent is distilled off in vacuo. Tris-(1-benzyl-2,2,6,6-tetramethyl-4-piperidinyl)hexane-1,2,2-tricarboxylate is obtained as a powdery residue. (Compound No. 1).

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