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Dimethyl 2-butyl-2-(3,5-di-tert-butyl-4-hydroxy-benz-yl)malonate.

ABSTRACT: The title compound, C(25)H(38)O(5), was formed by the reaction of dimethyl 2-butyl-malonate and 2,6-di-tert-butyl-4-[(dimethyl-amino)meth-yl]phenol. In the crystal structure, mol-ecules are linked by inter-molecular O-H?O hydrogen bonds into chains along [010].

SUBMITTER: Zeng T

PROVIDER: S-EPMC2970493 | biostudies-other | 2009

REPOSITORIES: biostudies-other

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Dimethyl 2-butyl-2-(3,5-di-tert-butyl-4-hydroxy-benz-yl)malonate.

Zeng Tao T Ren Wan-Zhong WZ

Acta crystallographica. Section E, Structure reports online 20090912 Pt 10

The title compound, C(25)H(38)O(5), was formed by the reaction of dimethyl 2-butyl-malonate and 2,6-di-tert-butyl-4-[(dimethyl-amino)meth-yl]phenol. In the crystal structure, mol-ecules are linked by inter-molecular O-H⋯O hydrogen bonds into chains along [010]. ...[more]

PMID: 21577885

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Diethyl 2,2-bis-(3,5-di-tert-butyl-4-hy-droxy-benz-yl)malonate.

Project description:The title mol-ecule, C(37)H(56)O(6), possesses twofold symmetry, with the twofold axis passing through the quaternary C atom. In the crystal, neighbouring mol-ecules are linked via O-H?O hydrogen bonds involving the phenol OH group and the carbonyl O atom, forming chains propagating in [101]. Within these chains, rings are formed with an R(2) (2)(20) motif. There are also C-H?O inter-actions present within the rings.

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2-[(3,5-Di-tert-butyl-4-hydroxy-benz-yl)-sulfan-yl]-N'-isopropyl-ideneaceto-hydrazide.

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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).

Project description: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.

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Project description:The title salt, C(8)H(20)N(+)·C(22)H(27)O(3)S(-), is a proton-transfer compound derived from the recently reported parent carb-oxy-lic acid [Alhadi et al. (2010). Acta Cryst. E66, o1787] by the addition of a second equivalent of di-n-butyl-amine, yielding the di-n-butyl-ammonium carboxyl-ate salt. The structure of the carboxyl-ate anion resembles that of the parent carb-oxy-lic acid. The main difference lies in the position of the H atom in the 4-hy-droxy group. In the anion the O-H bond is perpendicular, rather than parallel, to the benzyl ring. This position appears to facilitate hydrogen bonding to an O atom of the carboxyl-ate group of a symmetry-related anion. In addition, there are three N-H⋯O hydrogen bonds. In contrast, the neutral species hydrogen bonds via a carboxylic acid dimer. The dihedral angle between the benzene rings in the anion is 79.19 (7)°.

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2,4-Di-tert-butyl-6-[1-(3,5-di-tert-butyl-2-hydroxy-phen-yl)eth-yl]phenyl 4-methyl-benzene-sulfonate.

Project description:The title compound, C(37)H(52)O(4)S, was obtained by the reaction of 6,6'-(ethane-1,1-di-yl)bis-(2,4-di-tert-butyl-phenol) and 4-methyl-benzene-1-sulfonyl chloride. The mol-ecular conformation is stabilized by an intra-molecular O-H?O hydrogen bond. Two of the tert-butyl groups are disordered over two sets of sites with occupancies 0.530?(15)/0.470?(15) and 0.615?(11)/0.385?(11).

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2-(3,5-Di-tert-butyl-4-hydroxy-benzyl-sulfan-yl)nicotinic acid.

Project description:Two mol-ecules of the title compound, C(21)H(27)NO(3)S, are disposed about a center of inversion, generating an O-H⋯O hydrogen-bonded dimer.

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N'-[(Biphenyl-4-yl)methyl-ene]-2-[(3,5-di-tert-butyl-4-hydroxy-benz-yl)sulfan-yl]acetohydrazide.

Project description:In the title compound, C(30)H(36)N(2)O(2)S, the dihedral angle between the two aromatic rings of the biphenyl residue is 31.2?(1)°. The two methyl-ene C atoms subtend an angle of 99.9?(1)° at the S atom. In the crystal, mol-ecules form inversion dimers linked by pairs of N-H?O hydrogen bonds. The hydroxyl group is shielded by the tert-butyl residues and is therefore not involved in any hydrogen bonding.

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