Acta Cryst. (2009). E65, o2357  [ doi:10.1107/S1600536809035260 ]

Bis(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butyl-2-(3,5-di-tert-butyl-4-hydroxybenzyl)malonate (Tinuvin 144)

T. Zeng and W.-Z. Ren

Abstract: The title compound, C₄₂H₇₂N₂O₅, a hindered amine light stabiliser (HALS) with the trade name Tinuvin 144 was prepared from bis(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butylmalonate and 2,6-di-tert-butyl-4-[(dimethylamino)methyl]phenol using lithium amide as a catalyst. In the molecule, both piperidine rings adopt chair conformations. In the crystal, inversion dimers linked by pairs of O-HO hydrogen bonds occur.

Online 5 September 2009

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