title: Bis(1,2,2,6,6-penta-methyl-piperidin-4-yl) 2-butyl-2-(3,5-di-tert-butyl-4-hydroxy-benz-yl)malonate (Tinuvin 144).
abstract: The title compound, C(42)H(72)N(2)O(5), a hindered amine light stabiliser (HALS) with the trade name Tinuvin 144 was prepared from bis-(1,2,2,6,6-penta-methyl-piperidin-4-yl) 2-butyl-malonate and 2,6-di-tert-butyl-4-[(dimethyl-amino)meth-yl]phenol using lithium amide as a catalyst. In the mol-ecule, both piperidine rings adopt chair conformations. In the crystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds occur.
authors.affiliation: Chemistry & Biology College, Yantai University, Yantai 264005, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zeng
authors.forename: Wan-Zhong
authors.initials: WZ
authors.lastname: Ren