Solifenacin — Absolute Configuration

Enantiomeric identification of solifenacin using the Enantios ROA solution, comparing experimental and simulated spectra for the SR and RS forms.

Enantiomers of solifenacin (SR and RS)

Customer question: which enantiomer or diastereomer do I have?

  • Absolute configuration (AC) determination
  • Typical examples — small molecules with more than two chiral centres

Why come to Enantios?

  • Molecule cannot be crystallized or separated with HPLC
  • No or only weak differentiation using CD/VCD (if already tried)
    • ORD not expected to be usable for approval
  • Experimental references not available or not easy to synthesize
Comparison of experimental (bottom) and simulated (top) ROA spectra for solifenacin SR and RS
Correlation of experimental and simulated ROA spectra for solifenacin SR and RS at 24 h and 6 h

Results

Determination of absolute configuration (AC) in DMSO
No crystallization or XRD required
Works with experimental or simulated reference spectra

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