Merit of estimations from DSC measurements for the efficiency of optical resolutions |
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| Authors: | J Madarász D Kozma G Pokol M Ács E Fogassy |
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| Institution: | (1) Institute for General and Analytical Chemistry, Technical University of Budapest, Gellért tér 4, H-1521 Budapest, Hungary;(2) Department of Organic Chemical Technology, Technical University of Budapest, Müegyetem rkp. 3, H-1521 Budapest, Hungary |
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| Abstract: | Chiral drugs are generally resolved through formation of diastereoisomeric salts of different solubility. When the diastereoisomer
salts from a eutectic in the solid phase, a good estimate can be made for the efficiency of the resolution (S), through a calculation based on the eutectic composition (x
eu). The eutectic composition can be computed from thermal data of a differential scanning calorimetric (DSC) measurement of
the diastereoisomeric salts 1].
In this work we investigated the influence of uncertainties of thermal data on the estimation of the efficiency of resolution
(S), spreading throughout the calculations involved. Performance of our error-estimating method is demonstrated on 6 diastereoisomer
salt pairs. The obtained deviations are close to the deviations of resolution experiments. Thus, it can be concluded that
the DSC measurements are useful means in predicting the efficiency of resolutions.
Deceased |
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| Keywords: | DSC efficiency of optical resolution error estimation eutectic phase diagram |
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