An Experimental and Theoretical Conformational Study of a Series of Substituted 3-cyclohexyl-2-phenyl-1,3-thiazolidin-4-ones
- Kevin Cannon
- Linda Mascavage
- Kurt Kistler
- John Tierney
- Hemant Yennawar
- Anthony Lagalante
Abstract
A series of novel 3-cyclohexyl-2-phenyl-1,3-thiazolidin-4-one derivatives with substituents on the 2-phenyl ring were synthesized, and a study of their solid state and solution conformations was effected. In solution the thiazolidin-4-one ring preferred the C2 phenyl in a pseudo-equatorial orientation and the solid state indicated a preference for the C2 phenyl being in a pseudo-axial orientation. Less robust substituent chemical shift (SCS) correlations utilizing 13C NMR were observed in this instance than in prior studies. Molecular modeling studies using Møller-Plessett second-order perturbation theory (MP2) indicate that the thiazolidinone ring and cyclohexyl ring conformations exhibit a global minimum consistent with the solution studies.- Full Text:
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- DOI:10.5539/ijc.v5n3p46
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