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- W4248216748 abstract "Abstract An efficient deracemization method for conversion of the racemate to the desirable ( R )‐enantiomer of Praziquantel has been developed by coupling incompatible racemization and crystallization processes. By a library approach, a derivative that crystallizes as a conglomerate has been identified. Racemization occurs via reversible hydrogenation over a palladium on carbon (Pd/C) packed column at 130 °C, whereas deracemization is achieved by alternating crystal growth/dissolution steps with temperature cycling between 5–15 °C. These incompatible processes are combined by means of a flow system resulting in complete deracemization of the solid phase to the desired ( R )‐enantiomer (98 % ee ). Such an unprecedented deracemization by a decoupled crystallization/racemization approach can readily be turned into a practical process and opens new opportunities for the development of essential enantiomerically pure building blocks that require harsh methods for racemization." @default.
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- W4248216748 date "2021-01-19" @default.
- W4248216748 modified "2023-10-17" @default.
- W4248216748 title "Combining Incompatible Processes for Deracemization of a Praziquantel Derivative under Flow Conditions" @default.
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- W4248216748 doi "https://doi.org/10.1002/ange.202013502" @default.
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