Vibrational Circular Dichroism (VCD) Chiral Assignment of Atropisomers: Application to γ-Aminobutyric Acid (GABA) Modulators Designed as Potential Anxiolytic Drugs

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Abstract:

Atropisomers exist when axial chirality is present as a result of conformationally restricted rotation around a single bond. The interconversion rate of the individual atropisomers is critical to the assessment of chiral stability of a drug throughout scale-up, development, production, and storage as well as in vivo pharmacokinetics. We describe the application of vibrational circular dichroism spectroscopy coupled with quantum mechanics simulations to assign the absolute axial chirality and measure the racemization half-life of a series of potential anxiolytic drugs that act as γ-aminobutyric acid modulators.

Keywords: Atropisomer; Computational chemistry; Infrared spectroscopy; Vibrational circular dichroism

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/12-06934

Affiliations: AstraZeneca Pharmaceuticals, 1800 Concord Pike, Wilmington, DE 19803 USA

Publication date: April 1, 2013

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