Anthraquinone substituted by 2-methyl-1-naphthyl groups in positions 1,8 yields syn (meso) and anti (racemic) isomers (red and yellow colored, respectively) that interconvert with a barrier of 35.4 kcal mol-1 in solution. Their structures were identified by NOE experiment in solution and X-ray diffraction in the solids. The racemic anti form (C2 point group) entails two atropisomers that were separated by enantioselective HPLC: the absolute configuration was assigned by TD-DFT simulation of the ECD spectrum. Two atropisomers were also separated and assigned in the case of anthraquinone bearing a single 2-methyl-1-naphthyl substituent in position 1.

L. Lunazzi, M. Mancinelli, A. Mazzanti (2009). Structure, Stereodynamics and Absolute Configuration of the Atropisomers of Hindered Arylanthraquinones. JOURNAL OF ORGANIC CHEMISTRY, 74, 1345-1348 [10.1021/jo802383s].

Structure, Stereodynamics and Absolute Configuration of the Atropisomers of Hindered Arylanthraquinones

LUNAZZI, LODOVICO;MANCINELLI, MICHELE;MAZZANTI, ANDREA
2009

Abstract

Anthraquinone substituted by 2-methyl-1-naphthyl groups in positions 1,8 yields syn (meso) and anti (racemic) isomers (red and yellow colored, respectively) that interconvert with a barrier of 35.4 kcal mol-1 in solution. Their structures were identified by NOE experiment in solution and X-ray diffraction in the solids. The racemic anti form (C2 point group) entails two atropisomers that were separated by enantioselective HPLC: the absolute configuration was assigned by TD-DFT simulation of the ECD spectrum. Two atropisomers were also separated and assigned in the case of anthraquinone bearing a single 2-methyl-1-naphthyl substituent in position 1.
2009
L. Lunazzi, M. Mancinelli, A. Mazzanti (2009). Structure, Stereodynamics and Absolute Configuration of the Atropisomers of Hindered Arylanthraquinones. JOURNAL OF ORGANIC CHEMISTRY, 74, 1345-1348 [10.1021/jo802383s].
L. Lunazzi; M. Mancinelli; A. Mazzanti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/82954
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