Conformational Preferences of a Polar Biaryl: A Phase- and Enantiomeric Purity-Dependent Molecular Hinge
摘要:
The favored (R-s*,M*) diastereoisomer of 2-aryl-pyridine 1 in the solution state results from intramolecular dipole-dipole interactions. In the crystalline state, intermolecular interactions dominate, and the conformation switches reversibly to (R-s*,P*). Only racemic 1 exhibits this switching property: enantiomerically pure 1 exists as the (R-s*,M*) diastereoisomer in both the solution and crystalline state.
Conformational Preferences of a Polar Biaryl: A Phase- and Enantiomeric Purity-Dependent Molecular Hinge
作者:Jonathan Clayden、Stephen P. Fletcher、S. J. M. Rowbottom、Madeleine Helliwell
DOI:10.1021/ol9006635
日期:2009.6.4
The favored (R-s*,M*) diastereoisomer of 2-aryl-pyridine 1 in the solution state results from intramolecular dipole-dipole interactions. In the crystalline state, intermolecular interactions dominate, and the conformation switches reversibly to (R-s*,P*). Only racemic 1 exhibits this switching property: enantiomerically pure 1 exists as the (R-s*,M*) diastereoisomer in both the solution and crystalline state.
Clayden, Jonathan; Fletcher, Stephen P.; McDouall, Joseph J. W., Journal of the American Chemical Society, 2009, vol. 131, p. 5331 - 5343
作者:Clayden, Jonathan、Fletcher, Stephen P.、McDouall, Joseph J. W.、Rowbottom, Stephen J. M.