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A Simple and Cost-Effective Synthesis of Sulfated β-Cyclodextrin and Its Application as Chiral Mobile Phase Additive in the Separation of Cloperastine Enantiomers

preprint
submitted on 27.02.2020 and posted on 27.02.2020 by Krishna Deshpande, Pranav Pathak, Vishvas Joshi, Stephen barton, Krishnapriya Mohanraj
A new, simple and cost-effective method for the synthesis of sulfated beta-cyclodextrin (S-β-CD), one of the most widely used chiral mobile phase additive, using sulfamic acid as sulfonating agent has been described. The method was optimized and the acquired product was characterized and compared with a marketed Sigma Aldrich sulfated beta-cyclodextrin (S-β-CD1). Beta cyclodextrin (β-CD), hydroxypropyl beta-cyclodextrin (HP-β-CD), S-β-CD1 and S-β-CD2 were evaluated as chiral mobile phase additives (CMPAs) for the enantiomeric separation of cloperastine, an antitussive agent, using reversed-phase HPLC. Under the optimized conditions, a resolution of 3.14 was achieved within 15 minutes on an achiral Kromasil C8 (150 x 4.6 mm, 5 µ) column with a mobile phase of 5mM monopotassium phosphate containing 10mM S-β-CD3 pH 3 and 45% methanol with a run time of 15 min. The method utilizing S-β-CD3 as CMPA was validated as per ICH guidelines and applied for the quantitative determination of cloperastine enantiomers in active pharmaceutical ingredients and pharmaceutical formulations. The selectivity changes imparted by S-β-CD were proven to be beneficial for chiral separation. The chiral recognition mechanism and elution order of the reported enantiomers were determined by simulation studies. It was observed that inclusion complex formation and hydrogen bonding are the major forces for the chiral resolution.

Funding

University Grants Commission (F.NO.- 41-721/2012, Multicomponent Analysis of Drugs)

History

Email Address of Submitting Author

psp1112@gmail.com

Institution

Bombay College of Pharmacy

Country

India

ORCID For Submitting Author

0000-0002-2576-8265

Declaration of Conflict of Interest

No conflict of interest

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